News and press releases 2013

  • <p>Stripe order of charge carriers in Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+x</sub> [2]. The figure shows the structure with a period of approximately one nanometer (front) and the related diffraction pattern (back) obtained by a so-called Fourier transformation (Yazdani Lab, Princeton University).</p>19.12.2013

    Charge Order competes with superconductivity

    Today in Science Express: Charge carriers in cuprate high-Tc superconductors form nanostripes that suppress superconductivity, as shown by guest researchers from Princeton and Vancouver using synchrotron radiation at BESSY II

    Superconductors are materials that can conduct electricity without any loss of energy. In order to exhibit this property, however, classical superconductors need to be cooled almost to absolute zero (minus 273 degrees centigrade). Even the so-called high-Tc superconductors still require very low temperatures of minus 200 degrees centigrade. While cooling down to these temperatures involves substantial effort, superconductors are already employed in many areas, e.g., for magnetic resonance tomography in medical applications. Despite extensive research, materials providing lossless conduction of electricity at room temperature are missing up to now. [...].

  • Lise Meitner, Willy Brandt und Otto Hahn bei der Gründung des Hahn-Meitner-Instituts am 14. März 1959. Bild: Archiv18.12.2013

    75 Jahre Kernspaltung


    Am 17. Dezember 1938, also vor 75 Jahren, haben Otto Hahn und Fritz Straßmann die Kernspaltung entdeckt. Ihre Kollegin Lise Meitner, von den Nationalsozialisten ins Exil gezwungen, steuerte aus Schweden die entscheidende Interpretation bei: Die Experimente zeigten, so Meitner, dass Atome spaltbar sein können. Zum Jubiläum hat die Freie Universität Berlin gestern eine Gedenkveranstaltung abgehalten, mit Vorträgen und einem Nachbau des Experimentiertisches, den das Helmholtz-Zentrum Berlin für diesen Zweck an die FU ausgeliehen hat.

    Das Original des Tisches steht im Deutschen Museum in München, er wurde nun in Hahn-Meitner-Strassmann-Tisch umbenannt. [...].

  • A chalcopyrite thin film solar cell is normally made up of five layers (left). HZB-scientists have managed to reduce the number of steps of production and uniting the functionalities of two layers into one single layer which does not contain cadmium. Grafic: R. Klenk/HZB18.12.2013

    HZB team develops chalcopyrite solar cells without cadmium-based buffer layer

    A single layer takes on the job of what used to be two layers, doing away with the wet chemical process. Despite a much simplified production method, efficiencies of greater than 18 percent are well within reach.

    A chalcopyrite thin film solar cell is normally made up of five layers, each of which performs a unique job. Every single one of these layers has been optimized over many years to ensure chalcopyrite solar cells now reach very high efficiencies of greater than 20 percent. At the same time, from an economic perspective, reducing the number of steps of production and uniting the functionalities of separate layers into one single layer is of great interest. “One layer we could happily do without is the cadmium sulfide based buffer layer,” explains Dr. Reiner Klenk of the HZB Institute for Heterogeneous Material Systems. The reason being that a wet chemical bath deposition  is used to produce this layer, involving chemicals that are considered problematic and because the process is difficult to integrate in the chain of otherwise dry physical methods of deposition.

    The HZB researchers have now managed to modify the i- zinc oxide layer, which sits on top of the buffer layer, in such a way as to have it take on the job of buffer. [...].

  • In einem iterativen Prozess werden die ARPES-Messungen mit einem Algortihmus zu Wellenfunktionen verrechnet und erneut interpretiert. 17.12.2013

    Die Vermessung von Molekülen: Physiker der Uni Graz spüren Elektronenzustände auf


    Seit der Formulierung der Quantenphysik vor gut hundert Jahren träumen Wissenschaftlerinnen und Wissenschaftler davon, die quantenmechanischen Orbitale von Elektronen in Atomen, Molekülen und Festkörpern zu messen. Denn diese Orbitale bestimmen die chemischen und physikalischen Eigenschaften des Materials. Zwei Arbeitsgruppen um Ass.-Prof. Dr. Peter Puschnig und Ao.Univ.-Prof. Dr. Michael Ramsey am Institut für Physik an der Karl-Franzens-Universität Graz ist es nun gelungen, Elektronenorbitale von Kohlenwasserstoff-Molekülen auf einem Silbersubstrat sichtbar zu machen, indem sie Messungen an BESSY II  mit ab inititio-Berechnungen  kombiniert haben. Auch KollegInnen des deutschen „Forschungszentrums Jülich“ sind an der Arbeit beteiligt, die nun in der aktuellen Ausgabe der „Proceedings of the National Academy of Sciences (PNAS)“ publiziert worden ist. [...].

  • <p>Prize winners Dr. Karine dos Santos (left) and Dr. Katharina Diller together with Prof. Mathias Richter of the Friends of HZB. Picture: M. Setzpfand/HZB</p>16.12.2013

    Research at HZB facilities - packed in three days

    500 scientists gathered and shared information at the HZB User Meeting from 4 to 6 December 2013

    At this year’s User Meeting, around 500 researchers from Helmholtz-Zentrum Berlin got together to report on their latest results. At the fifth joint meeting at the beginning of December, thirty-three speakers gave lectures, representing an impressive range of topics that the researchers at the two large facilities BER II and BESSY II have explored over the past year. [...].

  • <p>Participants of the HERCULES kickoff meeting on 21-22 November 2013 at Institut National d&rsquo;Energie Solaire (INES) in Le Bourget du Lac near Chamb&eacute;ry, France.</p>10.12.2013

    HERCULES has started: European collaboration will pave the way to the next generation of c-Si based solar cell devices with efficiencies of 25 %

    Sixteen leading European research institutes, universities and partners from industry have joined forces in order to collaborate closely on the development of next generation of crystalline silicon based solar cells and modules. Together they proposed a concept of “High Efficiency Rear Contact solar cells and Ultra powerful moduLES” with the acronym HERCULES and received a 7 million Euro grant from the European Commission within the 7th Research Framework Programme. The project has started the 1st  of November 2013 and will finish end 2016.HZB physicists will contribute expertise in high efficiency back-contact silicon heterojunction solar cells, novel thin film materials as well as advanced materials and device characterization.

    HZB physicists will contribute expertise in high efficiency back-contact silicon heterojunction solar cells, novel thin film materials as well as advanced materials and device characterization. [...].

  • 09.12.2013

    Today: "HZB Distinguished Lectures": Prof. Joachim Stöhr will give a talk

    we would like to draw your attention to the "HZB Distinguished Lectures" and invite you to this. Prof. Joachim Stöhr from SLAC National Accelerator Laboratory and Stanford University will present on 9th December 2013 his thoughts on "The Light Fantastic: Birth of the X-Ray Laser and a New Era of Science". The presentation will be given at the lecture hall of the Wilhem-Conrad-Röntgen-Campus of HZB at 2 pm. After Prof. Stöhr’s presentation we have a get-together and time for informal discussion with "Glühwein" in the BESSY foyer. [...].

  • 09.12.2013

    Producing high performance solar cells at lower cost

    Dr. Sebastian Brückner graduates “summa cum laude” on solar cells made from III-V semiconductors

    Solar cells made from III-V semiconductors achieve the highest efficiency of all solar cells. Researchers recently celebrated a new world record in which HZB was involved: They successfully developed a solar cell that reaches 44.7 percent efficiency. And this technology holds even greater potential if the production subprocesses for these high performance cells could be more precisely controlled. Sebastian Brückner of Helmholtz Zentrum Berlin found the solution to an important challenge while completing his doctorate. He was studying the atomic surface structure of silicon and germanium, which are candidate substrate materials for such solar cells. Brückner gave compelling arguments as to how silicon and germanium substrates must be optimally prepared in the process gas environment in order to avoid defects in the subsequent III-V layers. For his thesis, which he submitted to Prof. Dr. Recardo Manzke of the Physics Institute at Humboldt-Universität zu Berlin, he received the highest academic distinction – a summa cum laude. [...].

  • 04.12.2013

    Recognition for Research on Smart Microgel Particles: Chemist Dr. Sebastian Seiffert Recipient of Reimund Stadler Award

    The chemist Dr. Sebastian Seiffert has been chosen to receive the prestigious Reimund Stadler Award for his work in polymer science. Seiffert does research at Freie Universität and the Helmholtz-Zentrum Berlin on “smart” microgel particles. The selection board on behalf of the German Chemical Society (Gesellschaft Deutscher Chemiker, GDCh) recognized Seiffert’s achievements in this field of research and also praised the interdisciplinary synergy between the university and the Helmholtz Center. The award has a monetary value of 2500 euros and will be presented in the fall of 2014. The recipient is expected to write trend reports for the GDCh on developments in the field of macromolecular chemistry for two years. [...].

  • 04.12.2013

    Martina Schmid is Junior Professor at Freie Universität Berlin

    The head of the Helmholtz junior group “Nano-Optical Concepts for Photovoltaics” (NanooptiX) at HZB, Dr. Martina Schmid, was appointed as junior professor at Freie Universität Berlin (FU) on 2 December 2013. Alongside her research at HZB, she will be teaching physics at FU. [...].

  • Successful during Helmholtz-Postdoc-Programme: Dr. Daniel Schick und Dr. Katja Höflich. Pictures: private04.12.2013

    Two new postdocs at HZB receive Helmholtz funding

    Dr. Daniel Schick and Dr. Katja Höflich have achieved success in the Helmholtz postdoctoral programme. They will each be receiving “starting capital” of 300,000 EUR for the next three years in order to further establish themselves in their research field. [...].

  • <p>Steve Cramer is looking forward to collaborate with the Berlin Team at HZB and FU.</p>03.12.2013

    Humboldt Research Award brings Stephen P. Cramer to Berlin

    The renowned synchrotron spectroscopy expert Professor Stephen P. Cramer has received a Humboldt Research Award and may now spend up to one year cooperating closely with a team at Helmholtz-Zentrum Berlin (HZB) and Freie Universität Berlin. Cramer was nominated by Professor Emad Aziz, who heads a Joint Lab for “Ultrafast Dynamics in Solution and at Interfaces” at HZB and Freie Universität. Cramer is Advanced Light Source Professor at University of California, Davis, and at the Lawrence Berkeley National Laboratory. [...].

  • This photo shows to the right Markus Scholz with the president of the examination committee, Prof. Matias Bargheer, after the successful defense. (credit: Oliver Rader)02.12.2013

    Markus Scholz received Ph. D. with "summa cum laude"

    Markus R. Scholz of the Department M-AMD received his Ph. D. degree from Potsdam University with the distinction "summa cum laude". He studied in the group of Oliver Rader so-called topological insulators using photoelectron spectroscopy. [...].

  • 27.11.2013

    HZB part of new metal oxide/water systems CRC

    A team of HZB researchers is part of the new collaborative research center, "Molecular insights into metal oxide/water systems" funded by the German Research Association. As part of this CRC, Dr. Bernd Winter of Prof. Dr. Emad Aziz's junior research group will be studying metal ions and metal oxide complexes in aqueous solution at BESSY II.

    Spokesman of the CRC is Prof. Dr. Christian Limberg of the Humboldt University Berlin. Other partners include the Freie Universität Berlin, the Technical University of Berlin, Potsdam University, the Federal Institute for Materials Research and Testing Berlin, and the Fritz Haber Institute of  the Max Planck Society Berlin. [...].

  • High-Tech-Bau neben High-Tech-Bau: Das „Energy Materials In-Situ Laboratory Berlin“ (EMIL) entsteht als Anbau neben der Synchrotronlichtquelle BESSY II des HZB. Foto: HZB26.11.2013

    Anbau an BESSY II im Rekordtempo: EMIL hat jetzt ein Dach über dem Kopf


    Das Forschungsgebäude für das neue Labor EMIL an BESSY II nimmt Form an: Am Mittwoch, 4. Dezember 2013, ab 13 Uhr feiert das „Energy Materials In-Situ Laboratory Berlin“ Richtfest. Die Zeremonie findet auf dem Wilhelm Conrad Röntgen Campus des Helmholtz-Zentrum Berlin, Albert-Einsteinstraße 15, 12489 Berlin, statt. Vertreter der Medien sind herzlich eingeladen.

    „Nur vier Monate nach dem ersten Spatenstich hat EMIL jetzt ein Dach über dem Kopf“, sagt Projektleiter Prof. Dr. Klaus Lips: „Das macht uns zuversichtlich, dass wir die Forschungsarbeiten in dem neuen, hochmodernen Präparations- und Analyselabor für die Solarenergie- und Katalyseforschung termingerecht 2015 aufnehmen können.“ [...].

  • <p>Der kaufm&auml;nnische Gesch&auml;ftsf&uuml;hrer Thomas Frederking gratulierte Karsten Harbauer zu seinem Patent.</p>22.11.2013

    Geschäftsführung übergab Patenturkunden an Erfinderinnen und Erfinder aus dem HZB


    Um ein Problem zu lösen, müssen Menschen in der Forschung oft unbeschrittene Wege gehen. Ist die Lösung dann tatsächlich neu und nicht aus dem vorhandenen Stand der Technik abzuleiten, kann aus der Erfindung noch mehr entstehen: ein Patent. Jedes Erfinderteam des HZB erhält bei der ersten Erteilung eines Patents für seine Erfindung 1.000 Euro. Thomas Frederking, kaufmännischer GF am HZB, überreichte im August bei einer feierlichen Runde Patenturkunden an Erfinderinnen und Erfinder aus dem HZB, deren Patente zwischen Juli 2012 und Juli 2013 erstmalig erteilt wurden. Wir geben Ihnen hier einen Überblick über die Patente der HZB-Mitarbeiterinnen und Mitarbeiter und stellen die Patentschriften zum Nachlesen zur Verfügung. [...].

  • 13.11.2013

    HZB-Zeitung "lichtblick" erschienen


    In der aktuellen Ausgabe der Lichtblick stellen wir Mitarbeiterinnen und Mitarbeiter aus dem HZB vor. Jessica Neumann leitet das Rechnungs- und Finanzwesen und stellt sicher, dass das HZB immer genug Geld auf dem Konto hat - eine herausfordernde Aufgabe, die Fingerspitzengefühl und Kommunikationsstärke erfordert. Außerdem geben wir Ihnen Einblicke in die Perspektiven der Energieforschung und die Weiterentwicklung von BESSY II. Die Zeitung können Sie  hier downloaden. [...].

  • Prof. Hans-Werner Schock (3.f.l.) receives the honorary doctorate at University of Tallinn.08.11.2013

    Honorary doctorate for Prof. Hans-Werner Schock

    Tallinn University of Technology (TTU) has named Prof. Hans-Werner Schock recipient of an honorary doctorate in recognition of Schock’s achievements during TTU’s integration into the Western research community after the 1990 fall of the Iron Curtain. [...].

  • A key feature of the active site of the trypanosomal thiolase is the HDCF-loop (HIS-ASP-CYS-PHE), visualised in light blue. Image: University of Oulu07.11.2013

    Blocking the active site of thiolase

    Scientists at the University of Oulu, Finland, and at the HZB break new ground for drug discovery research in the fight against sleeping sickness

    Scientists at the University of Oulu, Finland, and at the Helmholtz Center Berlin (HZB) have shown the way to new directions in drug development against African sleeping sickness and other tropical parasitic infections. This was based on the structural analysis of the enzyme thiolase, which plays a central role in lipid metabolism in the parasite that causes sleeping sickness. The researchers examined the biomolecule’s structure at the MX beamline of electron storage ring, BESSY II, at the HZB. (Biochemical J. 2013, DOI: 10.1042/BJ20130669) [...].

  • The new cavities during their installation. Picture: C. Jung/ HZB25.10.2013

    New cavities successfully installed

    At the heart of BESSY II are four cavities, hollow resonators, providing the energy that electrons in the storage ring re-absorb after they have released it as light packets. The old cavities were still from the 1970s and were employed at DESY in Hamburg, then at BESSY I, and finally at BESSY II beginning in 1998. “However, the limit of their operating life has been reached”, says Dr. Wolfgang Anders from the HZB Institute of SRF – Science and Technology. Anders, an expert in the field, was responsible for replacing two of the four old cavities with new units during the summer shutdown. [...].

  • <p>W&auml;hrend der Einf&uuml;hrungswoche f&uuml;r das Helmholtz Virtuelle Institut "Microstructure Control for Thin-Film Solar Cells" (MiCo) konnte sich der wissenschaftliche Nachwuchs mit den Materialsystemen, Charakterisierungstechniken und Modellierungsmethoden der D&uuml;nnschicht-Photovoltaik vertraut machen. Foto: D. Abou-Ras</p>24.10.2013

    Gut vorbereitet in die Forschung im Verbund


    Helmholtz Virtuelles Institut "Microstructure Control for Thin-Film Solar Cells" (MiCo) organisiert Einführungswoche für alle Partner

    Vor herbstlicher Kulisse fand vom 14. bis 18. Oktober die Einführungswoche des Helmholtz Virtuellen Instituts MiCo in Berlin statt, welches zum Ziel hat, durch vertieftes Verständnis der Mikrostrukturentwicklung während des Wachstums von Si- und Cu(In,Ga)Se2-Dünnschichten verbesserte Wirkungsgrade der entsprechenden Solarzellen zu erreichen. [...].

  • Prof. Susann Schorr with participants of Graduate School MatSEC22.10.2013

    New Materials for Photovoltaics: HZB starting its first own Graduate School

    Well-structured Ph.D. program

    New HZB Graduate School: Ph.D. candidates to study materials for energy conversion

    Yesterday’s workshop was the official starting signal for the opening of the Helmholtz Center Berlin’s new Materials for Solar Energy Conversion (MatSEC) Graduate School. MatSEC is the first HZB graduate training program for the Center’s doctoral students. The school is located at the Dahlem Research School (DRS) of the Freie Universität Berlin (FU Berlin). Up to ten Ph.D. students will be able to take advantage of MatSEC’s course offerings while working towards their degree. [...].

  • the 7-Tesla Multipole Wiggler: after one year working on it, the wiggler came back from Novosibirsk as planned but had to be removed from the storage ring again. The reason for highly elevated operating temperatures are investigated.21.10.2013

    Resumption of full scientific operation at BESSY II delayed

    While the lengthy summer shutdown with its comprehensive updating and maintenance work has been completed as planned, there have been some unforeseeable disruptions that will delay the resumption of regular Top-Up operations at present. The scientific operating time for users which was unavailable in October will be made up at the beginning of 2014. [...].

  • Participants and mentors of this year’s Neutron Summer School.20.10.2013

    Neutron Summer School for the study of hydrogen storage materials

    An international group of students and scientists recently completed Margarita Russina’s second ever Neutron Summer School program. Just like last year, the Summer School took place in mid-September on the HZB’s Wannsee campus, offering participants a week filled with a broad spectrum of classes and activities, all on the topic of neutron scattering methods in the study of hydrogen storage materials. [...].

  • <p>Dr. Manuela Klaus and Prof. Dr. Christoph Genzel won the Technolgy-Transfer-Prize for developing a new cutting tool. Image: Ingo Kniest/HZB</p>18.10.2013

    Technology Transfer Prize for development of an optimised cutting tool

    Dr. Manuela Klaus and Prof. Dr. Christoph Genzel have won the HZB Technology Transfer Prize awarded 17 October 2013. In collaboration with the Walter Company, they developed a new method for analysing and establishing the relationship between the structure and the properties of cutting tools having complicated coatings. They used synchrotron radiation for this purpose created in the electron storage ring of BESSY II. As a result of the insight gained, a production series of cutting tools having outstanding wear properties far superior to competing products was able to be patented and successfully introduced into the market. [...].

  • Zwei der vier alten Kavitäten wurden durch neue Kavitäten ausgetauscht. Foto: C.Jung/HZB18.10.2013

    Wiederaufnahme des Messbetriebs nach Sommershutdown:


    Seit Anfang der Woche läuft der Messbetrieb am Berliner Elektronenspeicherring BESSY II wieder. Damit ist der planmäßige neunwöchige Sommer-Shutdown 2013 beendet. Er stand in diesem Jahr unter besonderer Aufmerksamkeit, denn an BESSY II wird das große EMIL-Labor für die Solar- und Katalyseforschung angedockt. [...].

  • <p>Julia-Marie Vogt receives the prize for the best presentation at the 16th International Conference on Radio Frequency Superconductivity in Paris.</p>17.10.2013

    Slow, even cooling reduces losses in superconducting cavities

    Julia-Marie Vogt receives award for the best conference lecture by a junior scientist at the 16th International Conference on Radio Frequency Superconductivity.

    The demands researchers place on particle and linear accelerators are rising: interesting experiments require ever higher intensities and beam brilliance. These demands can best be met with the help of superconducting cavities. Dr. Oliver Kugeler and Julia-Marie Vogt from the Helmholtz-Zentrum Berlin have found a mechanism through which these cavities can be significantly improved. By controlled cooling of the superconductor, its losses can be minimised and the investment and operating costs of the required cooling system significantly reduced. Julia-Marie Vogt held a lecture at the 16th SRF Conference (2013) on how this thus-far unexplained effect arises. She received the conference prize for the best lecture given by a junior scientist. [...].

  • 11.10.2013

    Festsymposium zur 1000. Proteinstruktur an BESSY II


    Im Juli 2013 wurde die 1000. Proteinstruktur veröffentlicht, die auf bei BESSY II gemessenen Daten beruht. Aus diesem Anlass lädt das HZB am Mittwoch, den 16.10.2013, zu einem Festsymposium ein. Die Veranstaltung findet von 13.30 bis 17.00 Uhr im BESSY-Hörsaal auf dem WCRC in Adlershof statt.

    Vertreter der Medien sind herzlich eingeladen. Bitte melden Sie sich vorab an unter [...].

  • 10.10.2013

    High field magnet for neutron scattering has made its way to Italy

    After five years of manufacture, the superconducting spool for the new high field magnet for neutron scattering finally took off from Atlanta, USA, inside the belly of an MD-11F Lufthansa cargo plane on October 9, 2013, at 3:00 am EST. The plane landed in the cargo area at Frankfurt Airport promptly at 6:21 pm that same day. Following German customs clearance, the magnet was subsequently transferred to Italy by truck where, on Friday, October 11, it arrived in Chivasso/Turin. [...].

  • Graphene was deposited onto a glass substrate. The ultrathin layer is but one atomic layer thick (0.3 Angström, or 0.03 nanometers), although charge carriers are able to move about freely within this layer. This property is retained even if the graphene layer is covered with amorphous or polycrystalline silicon. Figure: Marc A. Gluba/HZB 08.10.2013

    Major leap towards graphene for solar cells

    Surprising result: Graphen retains its properties even when coated with silicon

    Graphene has extreme conductivity and is completely transparent while being inexpensive and nontoxic. This makes it a perfect candidate material for transparent contact layers for use in solar cells to conduct electricity without reducing the amount of incoming light - at least in theory. Whether or not this holds true in a real world setting is questionable as there is no such thing as "ideal" graphene - a free floating, flat honeycomb structure consisting of a single layer of carbon atoms: interactions with adjacent layers can change graphene's properties dramatically. Now, Dr. Marc Gluba and Prof. Dr. Norbert Nickel of the HZB Institute for Silicon Photovoltaics have shown that graphene retains its impressive set of properties when it is coated with a thin silicon film. These findings have paved the way for entirely new possibilities to use in thin-film photovoltaics. [...].

  • Scientists from all over the world discussed the challanges of messuring the dynamic processes in different materials with X-rays.08.10.2013

    At an international conference in Berlin, researchers were discussing options for using X-rays to take time-resolved measurements

    The Helmholtz Virtual Institute “Dynamic pathways in multidimensional landscapes” is striving for a holistic view of material properties

    In the heart of Berlin, 85 scientists came together on the occasion of an international conference in order to network as part of the Helmholtz Virtual Institute “Dynamic pathways in multidimensional landscapes” and gain new impulses for future research. The focus was on examining ultrafast dynamics within a broad material spectrum from molecules to nanostructures to strongly correlated solids. The conference took place from September 16 through 20 at the German Physical Society’s Magnus House in Berlin. [...].

  • <p>Scientists will discuss the novel approach "BESSY VSR" to create long and short photon pulses simultaneously for all beam lines in the Storage Ring BESSY II.</p>08.10.2013

    Workshop BESSY VSR

    On October 14-15, 2013 the BESSY VSR - Workshop "The Variable pulse length Synchrotron Radiation source" will be held at the Wilhelm-Conrad Röntgen Campus of the HZB in the lecture hall of BESSY II. We would kindly like to invite you to take part and discuss the unique science possibilities that BESSY VSR can provide. [...].

  • 02.10.2013

    Sommeruniversität für Erneuerbare Energien


    52 junge Leute aus aller Welt haben sich vom 25. August bis 6. September mit den vielseitigen Aspekten Erneuerbarer Energien beschäftigt

    Vor 3000 Jahren soll der Bergort Falera eine „Sonnenkultstätte“ gewesen sein, heute dagegen findet dort jedes Jahr eine Sommeruniversität zu Erneuerbaren Energien statt.  Das Besondere: Die rund 50 Studierenden kommen nicht nur aus verschiedenen Ländern, sondern auch aus unterschiedlichen Disziplinen: angehende Architekten sind darunter, Physikerinnen, Sozialforscher, Ingenieure und Wirtschaftswissenschaftlerinnen. „Ich bin davon überzeugt, dass wir all diese Perspektiven mit einbeziehen müssen, um wirklich gute Lösungen für die Nutzung Erneuerbarer Energiequellen zu entwickeln“, sagt Professor Dr. Martha Lux-Steiner, die die vom HZB unterstützte Sommerschule ins Leben gerufen hat. [...].

  • <p>Die Sommerstudenten vom HZB auf Erkundungstour durch Berlin</p>25.09.2013

    24 Sommerstudenten aus aller Welt zu Gast am HZB


    HZB bietet seit 25 Jahren Sommerstudentenprogramm für Nachwuchswissenschaftler an

    24 Studenten aus 13 Ländern nutzten die Semesterferien, um am Helmholtz-Zentrum einem eigenen Projekt nachzugehen und erste Erfahrungen in der Forschung zu sammeln. Mit dem internationalen Sommerstudentenprogramm bietet das HZB seit 25 Jahren jungen Menschen aus aller Welt Einblicke in die Energie- und Materialforschung. Bei dem achtwöchigen Praktikum werden sie von erfahrenden Forschern betreut.

  • 25.09.2013

    Türen auf für Kinder am 3. Oktober: Maustag an BESSY II


    Am Donnerstag, den 3.10.2013 findet in Deutschland wieder der große „Maus-Tag“ statt, an dem speziell solche Einrichtungen ihre Türen öffnen, die normalerweise für Kinder nicht zugänglich sind. Auch das HZB macht mit und lädt Kinder ab 4 Jahren in die große Experimentierhalle des Berliner Elektronen-Speicherrings BESSY II ein.


  • World record solar cell with 44.7% efficiency, made up of four solar subcells based on III-V compound semiconductors for use in concentrator photovoltaics. ©Fraunhofer ISE24.09.2013

    World Record Solar Cell with 44.7% Efficiency

    With a solar cell efficiency of 44.7%, scientists around Dr. Frank Dimroth at the Fraunhofer Institute for Solar Energy Systems ISE achieved a new world record for the conversion of sunlight into electricity. They used a new solar cell structure with four solar subcells, a new procedure called wafer bonding and optical components which concentrate the sunlight (Concentrated Photovoltaics CPV). Part of the cell structure was developed at the Helmholtz Zentrum Berlin in the research group of Prof. Thomas Hannappel, (now with Technical University Ilmenau). They developed methods to prepare critical interfaces and to avoid undesirable defects. SOITEC and CEA-Leti have as well contributed to this world record. [...].

  • Structure of the sugar molecule bound by the enzyme transketolase immediately prior to its being split12.09.2013

    Göttingen scientists use BESSY II to decode basic mechanism underlying biochemical reactions

    Enzymes are life’s molecular catalysts and figure prominently in cellular metabolism. It has been speculated that in the course of a biochemical reaction enzymes physically bend their substrates to split them. Now for the first time ever, scientists at the Göttingen Center for Molecular Biosciences (GZMB) have successfully used BESSY II's MX beamline to unequivocally confirm this hypothesis. The results from this study have been published in the renowned scientific journal Nature Chemistry. [...].

  • A scanning electron micrograph of a w=500&#8201;nm wide and 30&#8201;nm thick permalloy ring with radius r=2&#8201;&#956;m overlayed with a scanning transmission X-ray microscopy (STXM) image showing the in-plane magnetic contrast. Image: André Bisig/ Johannes Gutenberg Universität Mainz11.09.2013

    Domain walls as new information storage

    Domain wall motion imaging: at high speeds, material defects no longer play a role

    Physicists at the Johannes Gutenberg University Mainz have directly observed how magnetic domains behave within ultrasmall, curved nanowires. Their work involved using the MAXYMUS x-ray microscope of Max Planck Institute for Intelligent Systems  at Berlin-based electron storage ring BESSY II, which is operated by the HZB. In doing so, they succeeded at capturing these processes in the form of image sequences. In this way, they were able to not only experimentally confirm theoretically predicted effects but also to observe and understand  new properties that promise interesting potential applications in the area of information technology, including as information storage devices or as position sensors. Applications based on the principle of magnetic domain walls are already being used in sensor technology. [...].

  • 11.09.2013

    Wettbewerbsbeiträge für den HZB-Technologietransfer-Preis zu besichtigen: Am 12. September 2013 wird die Ausstellung in Wannsee eröffnet


    Für herausragende Leistungen auf dem Gebiet des Technologietransfers verleiht das HZB am 17. Oktober 2013 zum sechsten Mal den HZB-Technologietransfer-Preis. Er ist mit einem Preisgeld von 5.000 Euro dotiert. Im Vorfeld der Preisverleihung werden die eingereichten Projekte an beiden HZB-Standorten präsentiert. Thomas Frederking, kaufmännischer Geschäftsführer des HZB, wird am 12. September um 10 Uhr die Ausstellung im Hörsaalfoyer in Wannsee eröffnen. Sie sind herzlich eingeladen, einen Einblick in die Wettbewerbsbeiträge zu nehmen. Im Anschluss wird es einen Imbiss mit Getränken geben. [...].

  • 06.09.2013

    Now available: Highlights 2012 - the annual report with reseach highlights at HZB

    The Annual Report with research highlights is now available und could be downloaded.

    Within the report you could find a wide range of topics our scientists and users achieved by using our light source BESSY II, our neutron source BER II and in matter of energy reserach in 2012. Beyond that the annual reports focuses on the strategic goal to strengthen the efforts in energy science and introduces for example the new insitu-laboratory EMIL that will be built at BESSY II. Further aspects are the upgrade of BESSY II, collaborations and the appointments of new scientific leaders at HZB. [...].

  • 03.09.2013

    Voting für HZB-Videos


    Beim Video-Wettbewerb Fast Forward Science 2013 sind zwei HZB-Videos im Rennen - Bitte voten oder kommentieren

    Ob mit Camcorder oder Handykamera aufgenommen, ob Erklärvideo, Portrait oder filmisches Tagebuch: Im Wettbewerb Fast Forward Science sind maximal fünfminütige Web-Videos gesucht, die verständlich und unterhaltsam Wissenschaft präsentieren. Die Organisation "Wissenschaft im Dialog" und der Stifterverband für die Deutsche Wissenschaft haben zum Web-Video-Wettbewerb aufgerufen, und das HZB hat zwei Videos eingereicht. [...].

  • <p>Prof. Dr. Harry Tuller, MIT, was a guest-scientist at the institute for solar fuels.</p>29.08.2013

    Interview with MIT-Expert Harry Tuller

    When can we hope to store solar energy in form of hydrogen with an efficient and cheap solution? What is motivating young people to get involved into science these days? And how does is come that many scientists really love to work, even after the official retirement age? Prof. Dr. Harry Tuller ist answering these questions in an interview, which you can listen here. And if you prefer to read his answers, you could download the transcript.

    The Interview: [...].

  • 23.08.2013

    Neue "lichtblick" erschienen


    Großes Interview mit der Geschäftsführung zur Zukunft des HZB

    Die neue Ausgabe der HZB-Zeitung "lichtblick" ist erschienen. Sie finden darin Berichte über Menschen am HZB, über die Bauarbeiten an BESSY II, Preise und Forschungsergebnisse sowie eine kurze Reportage über die jungen Kraftwerksbauer, die in der Schüler-AG am HZB-Schülerlabor in Adlershof vier Modelle konstruiert haben, in denen sie Wasser, Sonne, Wind und Erdwärme nutzen.
    Im Mittelteil der Zeitung geben Anke Kaysser-Pyzalla, wissenschaftliche Geschäftsführerin des HZB und Thomas Frederking, kaufmännischer Geschäftsführer des HZB, ausführlich Auskunft über die Zukunftspläne für das HZB.

    Hier können Sie die "lichtblick" als epaper lesen oder als pdf herunterladen.


  • <p>Researchers have documented how inelastic scattering can intelligently intensified so that a shift of frequency is observed.<br />&copy;HZB/E. Strickert</p>21.08.2013

    Researchers from HZB open a door for solid state physics

    Laser processes observed with X-rays on a solid

    Without the currently available plethora of X-ray methods, basic research in the physical sciences would be unthinkable. The methods are used in solid state physics, in the analysis of biological structures, and even art historians have X-rays to thank for many new insights. Now, scientists at the Helmholtz Center Berlin (HZB) have identified yet another area of application. The team around Dr. Martin Beye and Prof. Alexander Föhlisch was able to show that solids lend themselves to X-ray analysis based on nonlinear physical effects. Until now, this could only be done using laser analysis. The work is being published in the e-pub-ahead-of-print-issue of the journal Nature (DOI: 10.1038/nature12449). Their results could potentially redefine what future X-ray sources ought to look like. [...].

  • This sketch demonstrates the principle of measurement which enables to address atom-specific and state-dependent emission of photons. With the help of first principles theory the spectral features can be associated with molecular orbitals. Figure: Uni Rostock21.08.2013

    Better insight into molecular interactions

    How exactly atoms and molecules in biochemical solutions or at solid-liquid interfaces do interact, is a question of great importance. Answers will provide insights at processes in catalysts, smart functional materials and even physiological processes in the body, which are essential for health. Until now, scientists could have a look at these interactions by methods of spectroscopy, but it was hard to distinguish the many different interactions, which take place simultaneously.
    A groundbreaking work by HZB-scientists could now change the game. Emad Flear Aziz and his team provides a new tool, which enables scientists to get a “fingerprint” of the interactions on the atomic scale. In collaboration with the group of theoretical physicist Oliver Kühn from the University of Rostock these fingerprints can be interpreted and linked to specific chemical interactions, thus allowing direct insight in what happens in the former “black box”. The results are now published in Physical Review Letters. [...].

  • Prof. Dr. Jürgen Mlynek, Katja Hessel, Dr. Wolfgang Heubisch, Joachim Herrmann, Prof. Dr. Johanna Wanka, Prof. Dr. Karl-Dieter Grüske, Prof. Dr. Harald Bolt, Prof. Dr. Achim Bachem, und Thomas Frederking20.08.2013

    Kooperationsvertrag für Helmholtz-Institut Erlangen-Nürnberg unterzeichnet


    Die Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), das Forschungszentrum Jülich und das Helmholtz-Zentrum Berlin (HZB) gründen gemeinsam das Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien (HI ERN). In Anwesenheit von Bundesforschungsministerin Prof. Dr. Johanna Wanka ist heute in Nürnberg der Kooperationsvertrag zwischen den drei Partnern unterzeichnet worden. Die Helmholtz-Gemeinschaft fördert das neue Institut mit jährlich 5,5 Millionen Euro. [...].

  • <p>Prof. Dr. Alan Tennant.</p>16.08.2013

    Prof. Dr. Alan Tennant has accepted a new position

    Prof. Dr. Alan Tennant has been selected as the new Chief Scientist for the Neutron Sciences Directorate, at Oak Ridge National Laboratory. He will start in his new capacity there in November 2013. “We are proud to have had Alan Tennant working with us for these last nine years”, says Professor Anke Kaysser-Pyzalla, scientific director of the Helmholtz-Zentrum Berlin (HZB). [...].

  • <p>Polymer chain incorporation during formation of ideal PE-nanocrystals by catalytic insertion polymerization with a water-soluble Ni(II) catalyst. The amorphous layers covering both platelets act as the wheels of a pulley just changing the direction of the chains. A moderate raise of the temperature induces sufficient mobility that allows the chains to move within the crystal.</p>14.08.2013

    Ideal nanocrystal produced from bulk plastics

    Polyethylene is an inexpensive commodity plastic found in many household objects. Now, a consortium of researchers from Constance, Bayreuth, and Berlin has successfully used this plastic to synthesize the ideal polymer nanocrystal. The prerequisite was a new type of catalyst produced by Constance University researchers as well as a combination of unique analytic tools like those found at the Helmholtz Zentrum Berlin (HZB). The crystalline nanostructure, which gives the polymer its new properties, could prove of interest to production of new kinds of coatings. The scientists’ findings are being published in the Journal of the American Chemical Society’s current issue (DOI: 10.1021/ja4052334). [...].

  • Dr. Anup Kumar Bera from the department of Quantum Phenomena in Novel Materials convinced the committee with his poster about ‘Haldane chains’. 14.08.2013

    International Conference in Neutron Scattering: HZB-contributions awarded

    More than 800 participants had gathered for the International Conference in Neutron Scattering, held during 8-12 July 2013 in Edinburgh, to discuss advances in neutron research and the advancement of the neutron scattering instruments and techniques. A committee selected sixteen outstanding posters from the 650 poster presentations, two of these from HZB scientists. [...].

  • 09.08.2013

    HZB-Forscher stellen Zukunftsprojekte für BESSY II vor


    „Synchrotron Radiation News“ zu Neuen Trends in der Beschleunigertechnologie enthält Beiträge zu BESSYVSR und BERLinPro

    In der Mai/Juni-Ausgabe der „Synchrotron Radiation News“ haben HZB-Experten die Zukunftsprojekte BESSYVSR und BERLinPro vorgestellt. Dr. Godehard Wüstefeld und Prof. Dr. Andreas Jankowiak berichten über den Low-α Operationsmodus an BESSY II und über das geplante Zukunftsprojekt BESSYVSR. [...].

  • As part of her doctoral work, Dr. Melanie Timpel was able to show just how strontium is able to refine modern-day lightweight alloys. 07.08.2013

    Melanie Timpel receives Acta Student Award

    Dr. Melanie Timpel's submission to the journal Acta Materialia made her one of this year's recipients of the 2,000 dollar 2012 Acta Materialia Student Award. The award is considered a high distinction conferred upon up-and-coming scientists. The award ceremony is scheduled for October 28, 2013, as part of the Materials Science & Technology Conference (MS&T) in Montreal, Canada. [...].

  • The inhibitor Ex-527 attaches to the enzyme Sirt-3 (shown here in light grey) and to acetylated ADP ribose; this substance is a product which results from Sirt-3 mediated deacetylation. This blocks the sirtuin’s active center to prevent further deacetylation. This way, the sirtuin has effectively set a permanent trap for itself the first time around. Image: C. Steegborn06.08.2013

    1000th protein structure decoded at BESSY II

    In July of this year, the 1000th protein structure based on measurements obtained at BESSY II was published. The molecule in question belongs to a class of proteins called sirtuins, which are involved in aging, stress, and metabolic processes within the human organism. Bayreuth University’s Prof. Clemens Steegborn and his team uncovered a clever mechanism used by active substances to inhibit sirtuin activity. The results have been published in the renowned scientific journal Proceedings of the National Academy of Sciences, USA, and could potentially point the way to new cancer therapies. [...].

  • Burial of the time capsule was part of the groundbreaking ceremony. Seen here are Klaus Lips, Anke Kaysser-Pyzalla, Birgit Schröder-Smeibidl, Markus Hammes, Bernd Rech, Axel Knop-Gericke (CAT project leader of the MPG's Fritz Haber Institute) and Thomas Frederking. Photo: Andreas Kubatzki/HZB 06.08.2013

    Groundbreaking for EMIL

    On Monday, August 5, 2013, a festive groundbreaking ceremony was the official signal for the start of construction of the new BESSY II research lab EMIL. The new cutting-edge solar energy and catalysis research preparation and analysis lab "Energy Materials In-Situ Laboratory Berlin" will be a direct BESSY II add-on. The joint project by the HZB and the Max Planck Society provides a one-of-a-kind infrastructure for the interdisciplinary and industry compatible development of new materials and technologies to facilitate the energy transition. This includes new material systems for solar modules as well as storage solutions for which new kinds of catalysts are warranted. [...].

  • 02.08.2013

    Die Bauarbeiten beginnen: BESSY II erhält Anbau für neuen Laborkomplex


    Mit einem feierlichen Spatenstich beginnen am Montag, dem 5. August 2013 um 16:00 die Bauarbeiten für das neue Forschungslabor EMIL an BESSY II: Das „Energy Materials In-Situ Laboratory Berlin“, kurz EMIL, wird als hochmodernes  Präparations- und Analyselabor für die Solarenergie- und Katalyseforschung aufgebaut. Das Gemeinschaftsprojekt vom HZB und der Max-Planck-Gesellschaft soll eine einzigartige Infrastruktur bieten, um interdisziplinär und industriekompatibel neue Materialien und Technologien zu entwickeln, die die Energiewende ermöglichen. Dazu zählen neue Materialsysteme für Solarmodule und Speicherlösungen, für die neuartige Katalysatoren entwickelt werden müssen.

    Ort: BESSY II, Albert-Einstein-Straße 15, 12489 Berlin (vor BESSY II in Richtung Magnusstraße)
    Zeit: Montag, 5. August 2013, 16:00


  • <p>When light hits the system, an electrical potential builds up. The metal oxide layer acts as a photo anode and is the site of oxygen formation. It is connected to the solar cell by way of a conducting bridge made of graphite (black). Since only the metal oxide layer is in contact with the electrolyte, the silicon solar cell remains safe from corrosion. A platinum spiral serves as the cathode where hydrogen is formed. Image: TU Delf</p>29.07.2013

    The best of two worlds: Solar hydrogen production breakthrough

    Using a simple solar cell and a photo anode made of a metal oxide, HZB and TU Delft scientists have successfully stored nearly five percent of solar energy chemically in the form of hydrogen. This is a major feat as the design of the solar cell is much simpler than that of the high-efficiency triple-junction cells based on amorphous silicon or expensive III-V semiconductors that are traditionally used for this purpose. The photo anode, which is made from the metal oxide bismuth vanadate (BiVO4) to which a small amount of tungsten atoms was added, was sprayed onto a piece of conducting glass and coated with an inexpensive cobalt phosphate catalyst. “Basically, we combined the best of both worlds,” explains Prof. Dr. Roel van de Krol, head of the HZB Institute for Solar Fuels: “We start with a chemically stable, low cost metal oxide, add a really good but simple silicon-based thin film solar cell, and – voilà – we’ve just created a cost-effective, highly stable, and highly efficient solar fuel device.” [...].

  •  Optical laser flash (red) destroys the electronic order (blue) in magnetite and, within one trillionth of a second, switches the state of the material from insulating to conducting. Image: Greg Stewart, SLAC National Accelerator Laboratory29.07.2013

    Picosecond accurate slow-motion confirms oxide materials exhibit considerably faster switching properties than do semi-conductors

    As part of an international team of researchers, scientists at the Helmholtz Center Berlin (HZB) have observed the switching mechanism from a non-conducting to a conducting state in iron oxide (specifically, magnetite) with previously unrealized precision. This switching mechanism - which, in oxides, proceeds in two consecutive steps and which is thousands of times faster than it is in current transistors - is described in the current epub-ahead-of-print issue of the scientific journal Nature Materials (DOI: 10.1038/NMAT3718).  

    Materials that have the ability to switch between being good conductors and being good insula-tors are considered good potential candidates for electronic building blocks – for use in transis-tors, for example. The iron oxide magnetite is the best known representative of this class of ma-terials. At low temperatures, magnetite has insulating properties; at high temperatures, the oxide is a good conductor. This switching mechanism however happens so quickly that it’s been im-possible until now to fully grasp it on an atomic level. [...].

  • <p>Fundamental processes: Charge donation/backdonation in the [Fe(CO)5] model catalyst in solution was studiedby resonant inelastic X-ray scattering. This method can be used to selectively probe the electronic structure at each atom in the iron-carbonyl bond. Image: HZB/Edlira Suljoti</p>25.07.2013

    Watching catalysts at work – at the atomic scale

    Innovative combination of methods at HZB leads to fundamental insights in catalyst research

    Developing materials with novel catalytic properties is one of the most important tasks in energy research. It is especially important to understand the dynamic processes involved in catalysis at the atomic scale, such as the formation and breaking of chemical bonds as well as ligand exchange mechanism. Scientists of Helmholtz-Zentrum Berlin (HZB) and collaborators have now combined the spectroscopic method “RIXS” with so-called ab initio theory in order to describe these processes in detail for a model organometallic catalyst of great interest to catalysis research – the iron carbonyl complex. The team publishes its results today in the prestigious scientific journal “Angewandte Chemie International Edition”. [...].

  • 24.07.2013

    Spektakulärer Einbau


    Industrienahe Anlage zur Herstellung von Dünnschichtsolarmodulen aus Kupfer-Indium-Gallium-Sulfid/Selenid am PVcomB komplett

    Der letzte, dem Kompetenzzentrum für Photovoltaik Berlin (PVcomB) noch fehlende Prozessofen musste mithilfe eines Krans durch ein Fenster im zweiten Stock gehievt werden. Dies gelang am Morgen des 9. Juli. Nun können in einem Prozess, der mit Industrieabläufen vergleichbar ist, CIGS-Dünnschichtsolarmodule in einer Größe von 30 mal 30 Quadratzentimeter hergestellt werden.  [...].

  • <p>The measurement (left) is impressively well reproduced in a simulation utilizing the HZB-code WAVE. Picture: J. Bahrdt/HZB</p>16.07.2013

    First Observation of Undulator Photon Beams Carrying Orbital Angular Momentum

    For the first time researchers of HZB observed 99eV photons carrying Orbital Angular Momentum (OAM). The photons were detected in the 2nd harmonic off-axis radiation of a helical undulator. The measurements confirm a theoretical prediction from five years ago. In the visible regime these singular photon beams or OAM-photons can be generated from laser light utilizing phase modulating techniques. The proof-of-principle experiment at BESSY II demonstrates the availability of OAM-photons up to the X-ray regime in low emittance machines, with helical undulators being used for the generation of circularly polarized radiation similar to today’s 3rd generation light sources. [...].

  • <p>HZB manufactured sawtooth grating. Photo: HZB</p>15.07.2013

    Grating manufacture at Helmholtz-Zentrum Berlin scores breakthrough - Sawtooth gratings for photon sources are once again available

    The Technology Center for Optical Precision Gratings at the Helmholtz-Zentrum Berlin (HZB) has scored a breakthrough in the manufacture of these optical building elements. Gratings are used in photon sources to diffract light and filter out those wavelengths that are needed for a given experiment. Now, after two and a half years of work, for the first time ever, the developers have created high precision sawtooth gratings that meet the demands of scientific experimentation. These sawtooth (or blazed) gratings recently underwent testing at BESSY II, the HZB’s own electron storage ring. The result: The gratings’ behavior conformed to the researchers’ theoretical predictions. The HZB Technology Center is the World’s sole manufacturer of high efficiency precision gratings for use in photon sources. The project has received EU funding in the form of an EFRE grant. [...].

  • Scanning electron microscopy image of the sample corresponding to a top view on the nanopillar structure. Credit: Uni Duisburg03.07.2013

    Shedding light on magnetoelectric coupling

    Effect opens up new possibilities for digital data storage

    It is possible to control the electric properties of solids by magnetic fields by means of the so-called magnetoelectric coupling. This has been investigated by scientists from the University of Duisburg-Essen and the Institute for Complex Magnetic Materials of the HZB at the electron storage ring BESSY II. The effect can be used to develop new data storage media which are faster and more energy saving than today. The scientists published their results in the current issue of the journal “Nature Communications”.


  • <p>Polycrystalline film growth during coevaporation in real time using in situ X-ray diffraction and fluorescence analysis. Figure: R. Mainz/C.Kaufmann/HZB</p>27.06.2013

    Watching solar cells grow

    For the first time, a team of researchers at the HZB led by Dr. Roland Mainz and Dr. Christian Kaufmann has managed to observe growth of high-efficiency chalcopyrite thin film solar cells in real time and to study the formation and degradation of defects that compromise efficiency. To this end, the scientists set up a novel measuring chamber at the Berlin electron storage ring BESSY II, which allows them to combine several different kinds of measuring techniques. Their results show during which process stages the growth can be accelerated and when additional time is required to reduce defects. Their work has now been published online in Advanced Energy Materials. [...].

  • 25.06.2013

    Helmholtz Center Berlin sets future course

    After some 60 years of successful neutron research in Berlin, research at the BER II reactor will officially cease by 2020

    At its June 25 meeting, the Helmholtz Center Berlin (HZB) board of directors made the decision to discontinue scientific operations at its BER II neutron source research reactor after January 1, 2020. “By giving everyone an early heads-up as to the projected date for the shut-down, we want to give BER II’s scientific users and the HZB directors the necessary reassurance to help them plan for a successful new focus of their research,” says Prof. Joachim Treusch, a member of the HZB board of directors. Treusch added that up until that point the BER II equipment, which was recently ranked exceptional in terms of quality, will continue to be fully available to its users. [...].

  • 18.06.2013

    Festkolloquium zu Ehren von Prof. K. Heinz Lindenberger


    Mit einem Ehrenkolloquium möchten die Geschäftsführer des HZB an das Wirken von Prof. Karl Heinz Lindenberger, ehemaliger Geschäftsführer des HMI, erinnern, der im Oktober des vergangenen Jahres verstorben ist. Das Kolloquium findet am 18. Juni um 16:00 Uhr im Hörsaal des Lise-Meitner-Campus Wannsee statt. Wir möchten Sie sehr herzlich zu der Veranstaltung einladen. [...].

  • 18.06.2013

    Masdar PV and Helmholtz-Zentrum Berlin partner to accelerate development of next generation thin film crystalline silicon PV technology

    • HZB’s first milestone achieved by succeeding in depositing a thin, crystalline 10μm layer of silicon on glass utilizing laser-crystallization
    • Demonstration of a world record value for the open-circuit voltage of 582 mV for c-Si on glass by HZB researchers
    • The next generation technology of thin film silicon on glass could enable better competition with existing crystalline PV producers

    MASDAR PV and HELMHOLTZ-ZENTRUM Berlin have strengthened their R&D partnership, focusing resources on development of next generation thin film Si technology. After successful cooperation in the development of Masdar PV´s first and second generation thin film silicon based solar cells, Masdar and HZB/PVcomB are now moving ahead to accelerate deployment of a new generation of thin film crystalline silicon based PV. [...].

  • <p>This complex solar cell is coated with two different catalysts and works like an "artificial leaf", using sunlight to split water and yield hydrogen gas.</p>17.06.2013

    Polymer-coated catalyst protects "artificial leaf"

    Storage solutions for irregular bursts of solar energy are desperately warranted. One option is to use the electrical energy generated inside solar cells to split water by means of electrolysis, in the process yielding hydrogen that can be used for fuel. Researchers at the HZB Institute for Solar Fuels have modified these superstrate solar cells with their highly efficient architecture in order to obtain hydrogen from water with the help of suitable catalysts. This type of cell works something like an "artificial leaf." But the solar cell rapidly corrodes when placed in the aqueous electrolyte solution. Now, Ph.D. student Diana Stellmach has found a way to prevent corrosion by embedding the catalysts in a conducting plastic and then mounting them onto the solar cell's two contact surfaces, making her the first scientist in all of Europe to have come up with a solution to this conundrum. As a result, the cell's sensitive contacts are sealed to prevent corrosion with a stable yield of approx. 3.7 percent sunlight.


  • <p>Gut besucht: Die F&uuml;hrungen um den Forschungsreaktor BER II in Wannsee stie&szlig;en bei den Besuchern auf gro&szlig;es Interesse.</p>11.06.2013

    3.700 Menschen besuchten das Helmholtz-Zentrum Berlin zur Langen Nacht der Wissenschaften


    Viele Wissenschaftsinteressierte in Berlin hatten sich den 8. Juni 2013 lange im Voraus freigehalten. An diesem Samstag strömten 29.000 Menschen zur Langen Nacht der Wissenschaften, um sich mit Forschern zu unterhalten, Vorträge zu hören und Eindrücke von den Laboren in der Stadt zu bekommen. Eine beliebte Adresse war in diesem Jahr wieder das Helmholtz-Zentrum Berlin, das an beiden Standorten, in Wannsee und Adlershof, seine Besucher herzlich empfing. [...].

  • Die Lange Nacht der Wissenschaften erreicht die Internetgemeinde: Die #ScienceTweetup Teilnehmer schauten sich in Forschungszentren um und twitterten. Foto: @klugestenacht <a href="" class="extern"></a> 11.06.2013

    Das Helmholtz-Zentrum Berlin beim ScienceTweetup: Aktive Blogger besuchen Forschungseinrichtungen und berichten


    Zum ersten Mal fand parallel zur Langen Nacht der Wissenschaften ein ScienceTweetup statt. 20 Twitterer nutzten die Gelegenheit, Labore verschiedener Forschungseinrichtungen zu besichtigen, die sonst der Öffentlichkeit selten zugänglich sind. Exklusive Führungen fanden im Helmholtz-Zentrum Berlin, im Deutschen Zentrum für Luft- und Raumfahrt, im Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik sowie im Institut für Physik der Humboldt-Universität zu Berlin statt. Bei einem Rundgang durch den Berliner Elektronenspeicherring BESSY II ließen sich die Teilnehmer von der Größe der Anlage begeistern. Anschließend berichten die Twitterer und Blogger in ihren Social-Media-Foren. [...].

  • 06.06.2013

    Helmholtz-Zentrum Berlin stärkt Aktivitäten zur Forschung an solaren Brennstoffen in Zusammenarbeit mit der Universität Erlangen-Nürnberg


    Gestern hat der Senat der Helmholtz-Gemeinschaft seine Zustimmung gegeben für die Ansiedlung eines neuen Helmholtz-Instituts zur Erforschung Erneuerbarer Energien in Erlangen und Nürnberg, kurz HI ERN. Das Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) ist neben dem Forschungszentrum Jülich und der Universität Erlangen und Nürnberg einer der Kooperationspartner und wird seine Expertise auf dem Gebiet der Dünnschicht-Photovoltaik in das neue Institut einbringen. [...].

  • Julian Petrasch lässt seine Sonden an Ballons in den Himmel steigen, wo sie in großer Höhe (ca. 30 Kilometer) zerplatzen. An einem Fallschirm segelt die Kapsel zu Boden. Die innen liegenden Handykameras nehmen dabei spektakuläre Ansichten auf. Foto: HZB/Kubatzki04.06.2013

    Berliner gewinnt beim Jugend-Forscht-Bundeswettbewerb. Er entwickelte eine kostengünstige Alternative zu Satellitenaufnahmen


    Bereits zum zweiten Mal ist der 21jährige Informatikstudent Bundessieger beim Jugend-forscht-Wettbewerb in Leverkusen geworden. Er gewann in der Kategorie Geo- und Raumwissenschaften. Petrasch entwickelte eine Alternative zu kostspieligen Satelittenaufnahmen. Er konstruierte innovative Stratosphärenballons und stattet sie mit Handykameras aus. Bei mehreren Testflügen bewies er, dass dieses System hervorragend funktionierte und die Luftaufnahmen eine erstaunlich hohe Auflösung hatten. Mit dieser Technologie können nicht nur aktuelle Luftbilder aufgenommen werden. Sie eignet sich auch, um thematische Karten, zum Beispiel zur Vegetation, zu erstellen. Das Schülerlabor des Helmholtz-Zentrum Berlin hat Julian Petrasch bei seinem Vorhaben unterstützt. [...].

  • Structure of Brr2-protein belongs to a family of enzymes that are called “RNA helicases”.31.05.2013

    Discovery of how a key enzyme of the spliceosome exerts its controlling function

    To sustain life, processes in biological cells have to be strictly controlled both in time and in space. By using the MX-Beamline of synchrotron radiation source BESSY II research workers at the Max Planck Institute for Biophysical Chemistry in Göttingen and the Free University of Berlin have elucidated a previously unknown mechanism that regulates one of the essential processes accompanying gene expression in higher organisms. In humans, errors in this control mechanism can lead to blindness. This discovery has been published in the renowned scientific journal Science (23th may 2013). [...].

  • Dr. Tristan Petit joins the Aziz-Team. Foto: T.Petit30.05.2013

    Humboldt Fellow new addition to Aziz team

    Starting June 1st, Dr. Tristan Petit will be joining Prof. Dr. Emad Flear Aziz’ team for a two-year postdoc. His Humboldt Foundation Fellowship for Postdoctoral Researchers gave Petit the option to choose his German scientific host. Ultimately, he decided on the Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) that was set up by Aziz. Says Petit: “I really wanted to be on Aziz’ team as they have a lot of collective expertise with spectroscopy in water.”

    26-year-old Tristan Petit earned his Ph.D. degree at the Ecole Normale Supérieure de Cachan, France, back in March of this year. His doctoral work at the Diamond Sensors Laboratory (CEA), Gif-sur-Yvette, focused on nanodiamond surface modifications to evaluate their biomedical potential. Nanodiamonds could make good “drug cabs” as they have low toxicity and their surfaces can be easily functionalized for the transport of other molecules. [...].

  • 29.05.2013

    Lange Nacht der Wissenschaften am HZB: Wir öffnen für Sie am 8. Juni von 16 bis 24 Uhr


    Am 8. Juni öffnen wir für Sie zur Langen Nacht der Wissenschaften unsere Türen – in Wannsee und Adlershof. 250 HZB-Mitarbeiter, darunter viele Wissenschaftlerinnen und Wissenschaftler, werden mit am Start sein: Sie freuen sich darauf, Ihnen hautnah einen lebendigen Einblick in ihre Forschung zu geben. Besucher haben die Möglichkeiten, unsere großen Forschungsanlagen an beiden Standorten zu besichtigen. Jedes Jahr machen sich mehr als 2500 Spitzenforscher aus aller Welt auf dem Weg zu unseren Laboren und Anlagen. Wir zeigen Ihnen, wie am HZB Solarzellen der Zukunft entstehen und wie Forscher unermüdlich daran arbeiten, damit die Photovoltaik im nächsten Jahrzehnt noch leistungsfähiger und kostengünstiger wird. Für Kinder und Schüler bietet das HZB viele spannende Mitmach-Experimente an beiden Standorten – genau das richtige, um „kleine Forscher “ und ihre Begleiter zum Staunen zu bringen. Stöbern Sie einfach durch das Programm: Adlershof und Wannsee [...].

  • Familie und Forschung: Die Teilnehmerinnen und Teilnehmer des Workshops diskutierten über Maßnahmen zur besseren Vereinbarkeit von Beruf und Familie speziell für den Forschungsbereich. Foto: Rebecca Richter29.05.2013

    Wie Forschungseinrichtungen bei der Suche nach qualifiziertem Personal punkten können


    HZB war Gastgeber des Workshops „Vereinbarkeit von Beruf und Familie in Forschungseinrichtungen“ der Hertie-Stiftung

    Wie gelingt es, die besten Köpfe aus der Wissenschaft an das eigene Forschungsinstitut oder die Hochschule zu holen? Neben den harten Faktoren, wie zum Beispiel dem Gehalt, geben gerade auch familienfreundliche Rahmenbedingungen den Ausschlag, wenn sich Fachkräfte für eine Stelle entscheiden. So müsse eine erfolgreiche Personalpolitk die persönlichen Belange der Mitarbeiter mit einbeziehen. Dieses Fazit zogen 30 Personalverantwortliche aus dem Forschungsbereich, die sich am 23. Mai 2013 am Helmholtz-Zentrum Berlin zum Workshop „Führung und Vereinbarkeit von Beruf und Familie in Forschungseinrichtungen“ trafen. [...].

  • The colloids that were used for the model: particles, each with a diameter of approximately 150 nanometers, suspended in water. The solid nucleus consists of the plastic polystyrene, the surrounding shell of a thermosensitive poly(N-isopropyl-acrylamide) network. By lowering the temperature, each individual particle's volume - and, by definition, its packing density - can be increased. Photo: HZB/M. Siebenbürger 28.05.2013

    Crystal-clear method for distinguishing between glass and fluids

    Many solids are produced from melting. Depending on how quickly they cool off, invariably, internal tensile stresses begin to build up. One example are Prince Rupert's Drops, or Dutch tears: you can hit their thick end with a hammer without breaking them while a slight pressure applied to their thin end is enough to shatter the entire tear. The properties of safety or even gorilla glass are determined to a large extent by their internal tensile stresses. However, until now, our understanding of the unique characteristics exhibited by the condition of the glass as compared with a tough molten mass was spotty at best. Now, a collaboration of several German and Cretian research teams has offered a surprisingly simple model to explain the difference between glass and molten materials. [...].

  • Foto: Für das Forschungsinstitut IRESEN werden neue Gebäude errichtet. Foto: IRESEN23.05.2013

    HZB-Forscher Ahmed Ennaoui in den Vorsitz von IRESEN gewählt


    Marokko liegt im Sonnengürtel der Erde, nutzt bislang aber noch hauptsächlich importierte fossile Brennstoffe, um den Strombedarf zu decken. Doch das Land will die Forschung zu Solarenergie verstärken. Eine wichtige Rolle dabei wird das Institut IRESEN (Institut de Recherche en Energie Solaire et Energies Nouvelles) spielen, das als staatlicher Projektträger eine Forschungslandschaft in Marokko aufbauen und Industrie- und Grundlagenforschung miteinander verknüpfen soll. Nun wurde der erfahrene HZB-Solarexperte Prof. Dr. Ahmed Ennaoui in den Vorsitz des wissenschaftlichen Rats der Forschungseinrichtung IRESEN gewählt.


  • 21.05.2013

    Posterpreis auf Internationaler Teilchenbeschleunigerkonferenz an Julia Vogt


    Vom 12. bis 17. Mai tagte in Shanghai, China, die 4. Internationale Konferenz für Teilchenbeschleuniger (International Particle Accelerator Conference, IPAC13). Rund 1.200 Teilnehmerinnen und Teilnehmern aus aller Welt hatten sich versammelt, um sich über Fortschritte bei Lichtquellen und Teilchenbeschleunigern auszutauschen. Besonderes Gewicht legten die Organisatoren auf die Postersession, auf der Nachwuchswissenschaftler ihre Arbeiten vorstellen konnten. Dabei erhielt die HZB-Doktorandin Julia Vogt aus dem Institut SRF Wissenschaft und Technologie (G-ISRF) einen Preis für das beste Poster.

    HZB-Experten waren auch im Vortragsprogramm sehr gut vertreten.  „Unsere Kollegen halten auf der IPAC13 drei Vorträge“, sagt Prof. Dr. Andreas Jankowiak, der das Institut Beschleunigerphysik des HZB leitet. „Damit sind wir das deutsche Labor mit den meisten Vorträgen. Und aus Europa ist nur das CERN stärker vertreten als wir. Wir liegen gleichauf mit den anderen großen internationalen Laboren." [...].

  • Magnet islands: Scanning electron micrograph from a regularly arranged square lattice of magnetic islands. The researchers created the islands using electron beam lithography © modifiziert nach / modified from Physical Review Letters16.05.2013

    RUB physicists let magnetic dipoles interact on the nanoscale for the first time

    “Of great technical interest for future hard disk drives”

    Physicists at the Ruhr-Universität Bochum (RUB) have found out how tiny islands of magnetic material align themselves when sorted on a regular lattice - by measurements at BESSY II. Contrary to expectations, the north and south poles of the magnetic islands did not arrange themselves in a zigzag pattern, but in chains. “The understanding of the driving interactions is of great technological interest for future hard disk drives, which are composed of small magnetic islands”, says Prof. Dr. Hartmut Zabel of the Chair of Experimental Physics / Solid State Physics at the RUB. Together with Dr. Akin Ünal, Dr. Sergio Valencia and Dr. Florian Kronast from the Helmholtz-Zentrum in Berlin, Bochum’s researchers report in the journal “Physical Review Letters”.


    Read the full text in the press release of RUB:


  • A German-US-collaboration explores photosynthesis with the help of light sources as SLAC or BESSY II by taking snapshots of catalytic reactions. Illustration: Greg Stewart, SLAC National Accelerator Laboratory15.05.2013

    Snap shots of one of life's central processes

    Human Frontier Science Program provides funding of 900,000 US Dollars in support of international collaboration on photosynthesis.

    Photosynthetic water-oxidation is one of the central processes of life on Earth but remains incompletely understood. Now, a German-American team of scientists has set out to observe the intermediate stages of this complex catalytic reaction using ultrashort snap shots taken at light sources including BESSY II in Berlin and the Linac Coherent Light Source at Stanford. To support their efforts, the Human Frontier Science Program has now pledged funding of approximately 900,000 US Dollars for a total three-year period. The team includes HZB physicist Dr. Philippe Wernet, chemist Prof. Dr. Athina Zouni of Humboldt University of Berlin, Dr. Uwe Bergmann of the SLAC National Accelerator Laboratory and Dr. Junko Yano of the Lawrence Berkeley National Laboratory, who is in charge of the project. [...].

  • 15.05.2013

    Zwei Humboldt-Stipendiaten forschen am HZB: In der neuen Lichtblick stellen wir Jan Heyda und Stefano Angioletti-Uberti vor


    Die Qualität des Alexander-von-Humboldt-Stipendiums ist weltweit anerkannt. Die Nachwuchswissenschaftler Stefano Angioletti-Uberti und Jan Heyda haben sich für dieses Stipendium entschieden, obwohl sie gleich mehrere Angebote für einen Forschungsaufenthalt im Ausland bekommen hatten. Beide forschen am HZB-Institut für Weiche und Funktionale Materialien bei Joachim Dzubiella. Sie interessieren sich für stimuli-responsive Polymaterialien. Wir stellen sie in der neuen Ausgabe der Lichtblick vor. [...].

  • Im Labor für Elektrochemie ziehen die Mädchen alle weiße Kittel an. Dann können sie einen Anhänger aussuchen, den sie vergolden möchten. Foto: Rebecca Richter/HZB 25.04.2013

    Girls‘ Day 2013: 95 Mädchen stürmen das Helmholtz-Zentrum Berlin


    95 junge Mädchen zwischen 10 und 15 Jahren sind am Girls‘ Day, den 25. April 2013,  zum Helmholtz-Zentrum Berlin gekommen. Sowohl am Standort Wannsee als auch am Standort Adlershof hatte das HZB-Schülerlabor viele Wissenschaftlerinnen und Mitarbeiter dafür gewinnen können, die Mädchen in kleinen Gruppen zu betreuen und ihnen einen Eindruck von ihrer Arbeit zu vermitteln. [...].

  • <p>Participants - Kick-off-Workshop Helmholtz Virtual Institute &bdquo;New states of matter and their excitations&ldquo;</p>23.04.2013

    Quantum computer research

    Monday, April 22, saw the start of the Helmholtz Virtual Institute’s three-day kick-off workshop entitled “New states of matter and their excitations” at the Free University Berlin. The Institute, which is coordinated by the HZB, has as its focus the collective behavior and new phases of matter. At the opening event, Prof. Dr. Brigitta Schütt, the Free University’s VP, said she was thrilled that Dahlem was the workshop location for this important collaboration – which also includes the Dresden-based Max Planck Institute for the Physics of Complex Systems, Dresden Technical University, Göttingen University, and Dortmund Technical University. Schütt stressed that the particular strength of Berlin as a research hub was fed by the performance of the region’s scientific institutions and their openness to collaborations. [...].

  • 12.04.2013

    Materialforschung mit ultrahochempfindlicher Spektroskopie


    Neues Labor zur Erforschung biologischer Zellen und Solarzellen des Helmholtz-Zentrums Berlin und der Freien Universität Berlin in Adlershof eröffnet

    Das Helmholtz-Zentrum Berlin (HZB) und die Freie Universität haben am Donnerstag ein neues Labor zur Erforschung von Materialien mithilfe der Elektronenspinresonanz (Electron Paramagentic Resonance, kurz EPR) eröffnet. Ziel des in Kooperation beider Institutionen betriebenen „Berlin Joint EPR Laboratory“ (BeJEL) ist es, EPR-basierte Methoden zu entwickeln, mit denen beispielsweise neue Materialien für Dünnschichtsolarzellen oder andere Anwendungen in der Photovoltaik sowie biologische Systeme untersucht werden können. [...].

  • <p>D&uuml;nnschicht-Solarzellen - hier so genannte CIGS-Zellen - haben ein gro&szlig;es Entwicklungspotenzial. In den letzten Jahren erzielen Forscher immer wieder neue Wirkungsgradrekorde.</p>05.04.2013

    In der Dünnschicht-Photovoltaik liegt enormes Potenzial - Experten für Dünnschichtsolarzellen treffen sich vom 16. bis 18. April auf der „Photovoltaics Thin-Film Week“ in Berlin


    Die Krise in der Solarbranche ist noch nicht durchgestanden. Chinesische Unternehmen dominieren mit Billigpreisen den Markt für Solarmodule, aber auch in Asien können viele Unternehmen dem Wettbewerbsdruck nicht standhalten. Einen Wettbewerbsvorteil können hiesige Solarfirmen nur durch Technologievorsprung und konsequente Innovationen erreichen. Die Dünnschicht-Photovoltaik bietet ein großes, längst noch nicht ausgeschöpftes Potenzial für kostengünstige und leistungsfähige Solarmodule. Vom 16. bis 18. April treffen sich in Berlin Experten aus aller Welt bei der „Photovotaics Thinfilm-Week“. Forscher und Fachleute aus der Industrie tauschen sich über neuste Ergebnisse aus Forschung und Entwicklung der Dünnschichtphotovoltaik aus und beraten über notwendige politische Rahmenbedingungen. [...].

  • An ultrafast spin current triggers the emission of Terahertz-Radiation. Graphics: H. D. Wöhrle/Universität Göttingen01.04.2013

    Ultrafast Spin Manipulation at THz frequencies

    The demands for ever increasing speed of information storage and data processing have triggered an intense search for finding the ultimately fast ways to manipulate spins in a magnetic medium. In this context, the use of femtosecond light pulses – the fastest man-made event with photon energies ranging from X-rays (as used for instance at the HZB femto-slicing facility) to THz spectral range proved to be an indispensable tool in ultrafast spin and magnetization dynamics studies. [...].

  • 27.03.2013

    Konferenz für Dünnschicht-Photovoltaik vom 16. bis 18. April 2013 in Berlin


    Zum nunmehr fünften Mal findet in Berlin die " Photovoltaics Thinfilm Week" statt. Im Zentrum steht ein wissenschaftlicher Workshop, in dem renommierte Experten über neueste Ergebnisse aus der Erforschung von CIGS-Solarzellen und deren Anwendungsmöglichkeiten berichten. Welchen Beitrag die Dünnschicht-Photovoltaik zur Energiewende leisten kann, wird im Industrieforum diskutiert. Die Thinfilm-Week hat sich in der Solarbranche als unerlässliches Forum zum Austausch und Technologietransfer etabliert. Organisiert wird die Veranstaltung von Solarpraxis, dem Berliner Kompetenzzentrum für Photovoltaik - PVcomB - und dem Helmholtz-Zentrum Berlin. Weitere Informationen und Registrierung. [...].

  • <p>Picture: HZB / University Paderborn</p>27.03.2013

    Magnetic fingerprints of interface defects in silicon solar cells detected

    Using a highly sensitive method of measurement, HZB physicists have managed to localize defects in amorphous/crystalline silicon heterojunction solar cells. Now, for the first time ever, using computer simulations at Paderborn University, the scientists were able to determine the defects' exact locations and assign them to certain structures within the interface between the amorphous and crystalline phases. [...].

  • 26.03.2013

    Mit Mathematik die Sonne besser nutzen - das Virtuelle Institut „Mikrostruktur-Kontrolle für Solarzellen“ am HZB schafft breites Expertennetzwerk


    Das Helmholtz-Zentrum Berlin (HZB) koordiniert seit kurzem ein Virtuelles Institut, das sich intensiv und mit einem breit angelegten Forschungsansatz modernen Solarzellen widmet. Es ist ein Schulterschluss von Forschern aus verschiedenen Forschungsdisziplinen, um die Grundlage für noch leistungsfähigere Solarzellen zu legen. Die Wissenschaftler wollen die komplexe Mikrostruktur polykristalliner Absorberschichten in Dünnschichtsolarzellen untersuchen und verstehen lernen. Wichtiger Partner im Netzwerk ist auch das DFG-Forschungszentrum „MATHEON“, in dem die Professoren Barbara Wagner (TU Berlin) und Ralf Kornhuber (FU Berlin) arbeiten. Ihre Aufgabe im Virtuellen Institut ist es, das Wachstum von Mikrostrukturen theoretisch zu modellieren und zu simulieren. [...].

  • <p>Julian Petrasch, 21 Jahre, bei der Pr&auml;sentation seiner Ergebnisse.</p>26.03.2013

    Über den Wolken: Messdaten aus der Stratosphäre mit Wetterballons gewinnen


    Julian Petrasch bekommt ersten Preis beim Berliner Jugend-forscht-Landeswettbewerb.
    Der Informatik-Student Julian Petrasch siegte beim Berliner Landeswettbewerb „Jugend forscht“ in der Kategorie Geo- und Raumwissenschaften – und hat damit auch gleich den Fahrschein für den bundesweiten Ausscheid im Mai in Leverkusen in der Tasche. Das Schülerlabor des HZB hat Julian Petrasch, 21 Jahre, unter anderem bei der Materialbeschaffung und Präsentation seiner Arbeit unterstützt. Der Jungforscher stellte beim Wettbewerb eine alternative Methode vor, um Daten aus der Stratosphäre zu gewinnen. [...].

  • Figure: Gregory Stewart at SLAC National Accelerator Laboratory15.03.2013

    Real time observation of chemical reaction at catalyst

    Scientists at the U.S. Department of Energy's (DOE) SLAC National Accelerator Laboratory used LCLS, together with computerized simulations, to reveal surprising details of a short-lived early state in a chemical reaction occurring at the surface of a catalyst sample. The study offers important clues about how catalysts work and launches a new era in probing surface chemistry as it happens. [...].

  • 13.03.2013

    Schwache Dotierung verbessert polymerbasierte Feldeffekttransistoren


    In der organischen Elektronik haben sich Mischsysteme, in denen halbleitende Makromoleküle in einer isolierenden Polymermatrix eingebettet sind, als besonders geeignet für die Herstellung von  Transistoren erwiesen. Bislang waren die Gründe dafür nicht genau bekannt. Nun konnten Wissenschaftler aus mehreren Forschungseinrichtungen die komplexe Morphologie dieser Mischsysteme aufklären und damit die elektronischen Eigenschaften erklären. [...].

  • 09.03.2013

    Kathrin Lange erhält Wilhelm-Ostwald-Nachwuchspreis 2012


    Dr. Kathrin Maria Lange erhält für ihre am HZB angefertigte Dissertation den Wilhelm-Ostwald-Nachwuchspreis 2012. Der mit 2500,- Euro dotierte Preis wird von der Wilhelm-Ostwald-Gesellschaft zu Großbothen e.V., der Deutschen Bunsen-Gesellschaft für Physikalische Chemie und der Gesellschaft Deutscher Chemiker verliehen. Die Preisverleihung findet am 9. März in Großbothen bei Leipzig statt, dem Arbeitsort des Nobelpreisträgers für Chemie 1909, Wilhelm Ostwald. [...].

  • 28.02.2013

    International summer school Quantsol conveys basics of photovoltaics and solar energy conversion

    For the sixth year in a row, future solar researchers are invited to attend the HZB’s International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion – Quantsol. The summer school program is scheduled for September 8th through the 15th in Hirschegg, Austria, and has been organized jointly by the Helmholtz Centre Berlin and Ilmenau Technical University. All interested parties are welcome to apply before May 26, 2013. [...].

  • <p>Uwe M&uuml;ller und Thomas Frederking ( durchtrennen das Band. Der neue Detektor ist nun einsatzbereit.</p>27.02.2013

    Proteinstrukturen besser erforschen


    Feierlich eingeweiht: Der neue Pilatus-Detektor für die Kristallographie ist nun einsatzbereit

    Am Montag, dem 25. Februar wurde der neue Pilatus 6M-Detektor am HZB eingeweiht, der an der MX-Beamline BL14.1 für noch bessere Ergebnisse sorgen wird. Thomas Frederking, kaufmännischer Geschäftsführer am HZB, und Dr. Uwe Müller, Leiter der HZB-Arbeitsgruppe Kristallographie“, zerschnitten gemeinsam das rote Band und übergaben damit den neuen Detektor in den Dienst der Wissenschaft. Entwickelt und gefertigt wurde das neue Gerät von der Schweizer Firma Dectris. Das HZB investierte 1, 2 Millionen Euro in dieses Projekt. [...].

  • 25.02.2013

    HZB-Zeitung "lichtblick" erschienen


    Forscherinnen und Forscher aus dem HZB versuchen, die Herausforderungen der Energieversorgung zu meistern. Sie entwicklen Solarzellen der nächsten Generation und neuartige Materialien für solare Brennstoffe. Verstärkung bekommen sie nun durch ein neu gegründetes HZB-Institut, das von Dr. Silke Christiansen geleitet wird. Im Gespräch verrät sie, wie sie an Naturwissenschaften gekommen ist. Nanopartikel gewinnen bei der Energieforschung zunehmend an Bedeutung. Mit einer besonderen Methode, der Kleinwinkelstreuung mit Röntgenstrahlung, erhalten Forscher besonders aufschlussreiche Einblicke in Materialien. Wie das geht, stellen wir Ihnen vor. Weitere Themen sind unter anderem, wie sich Graphen auf Nickelschichten verhält und welche Ideen Forscher für die Weiterentwicklung des Elektronenspeicherrings BESSY II haben. Hier finden Sie die elektronische Ausgabe: pdf [...].

  • The titanium dioxide nanoparticles crystallize in a polymer network at room temperature. 21.02.2013

    Titanium dioxide nanoreactor

    Successful synthesis of polymeric nanoreactors at room temperature - Experiments at BESSY II reveal even distribution and crystalline structure of the nanoparticles

    Tiny particles of titanium dioxide are found as key ingredients in wall paints, sunscreens, and toothpaste; they act as reflectors of light or as abrasives. However with decreasing particle size and a corresponding change in their surface-to-volume ratio, their properties change so that crystalline TiO2 nanoparticles acquire catalytic ability: Activated by the UV component in sunlight, they break down toxins or catalyze other relevant reactions.

    Now, Dr. Katja Henzler and a team of chemists at the Helmholtz Centre Berlin have developed a synthesis to produce nanoparticles at room temperature in a polymer network. Their analysis, conducted at BESSY II, Berlin's synchrotron radiation source, has revealed the crystalline structure of the nanoparticles. This represents a major step forward in the usage of polymeric nanoreactors since, until recently, the nanoparticles had to be thoroughly heated to get them to crystallize. The last synthesis step can be spared due to the special environment inside the PNIPAM network.


  • Upon contact between the oxygen atoms protruding from the backbone and the metal, the molecules' internal structure changed in such a way that they lost their semiconducting properties and instead adopted the metallic properties of the surface.</br>Visualisation: Georg Heimel/HU Berlin 18.02.2013

    Organic Electronics - How to make contact between carbon compounds and metals

    Organic electronics has already hit the market in smart-phone displays and holds great promise for future applications like flexible electroluminescent foils (a potential replacement for conventional light bulbs) or solar cells that convert sunlight to electricity. A reoccurring problem in this technology is to establish good electrical contact between the active organic layer and metal electrodes. Organic molecules are frequently used also for this purpose. Until now, however, it was practically impossible to accurately predict which molecules performed well on the job. They basically had to be identified by trial-and-error. Now, an international team of scientists around Dr. Georg Heimel and Prof. Norbert Koch from the HZB and the Humboldt University Berlin has unraveled the mystery of what these molecules have in common. Their discovery enables more focused improvements to contact layers between metal electrodes and active materials in organic electronic devices. [...].

  • Scanning Electron Microscopy of Nanowires of Silver. <br />They have diameters around 0,1 micrometer and lenghts <br /> between 5 and 10 micrometern. Bild: ACS Nano 3: 1767-177429.01.2013

    New Options for transparent contact electrodes

    Found in flat screens, solar modules, or in new organic light-emitting diode (LED) displays, transparent electrodes have become ubiquitous. Typically, they consist of metal oxides like In2O3, SnO2, ZnO and TiO2. But since raw materials like indium are becoming more and more costly, researchers have begun to look elsewhere for alternatives. A new review article by HZB scientist Dr. Klaus Ellmer, published in the renowned scientific journal Nature Photonics, is hoping to shed light on the different advantages and disadvantages of established and new materials for use in these kinds of contact electrodes. [...].

  • 28.01.2013

    Demagnetization by rapid spin transport

    The fact that an ultrashort laser pulse is capable of demagnetizing a ferromagnetic layer in a jiffy has been well-known since approximately 1996. What we don't yet understand, however, is how exactly this demagnetization works. Now, physicist Dr. Andrea Eschenlohr and her colleagues at the Helmholtz Centre Berlin and Uppsala University in Sweden have shown that it turns out not to be the light pulse itself that prompts demagnetization. [...].

  • 21.01.2013

    MIT's Prof. Tuller named new recipient of Helmholtz International Fellow Award

    World-renowned expert for solid state electrochemistry to conduct research at HZB
    In recognition of his outstanding scientific achievements, the Helmholtz Association has named Prof. Dr. Harry L. Tuller the next recipient of the Helmholtz International Fellow Award. The award in the amount of 20,000 Euros also includes an invitation for an extended stay at the Helmholtz Centre Berlin (HZB). During his stay, Prof. Tuller will be conducting research at HZB’s new Institute of Solar Fuels. The goal of this exchange is for HZB to benefit from the internationally renowned researcher's unparalleled expertise in the area of solid state electrochemistry, while mutually sharing competencies. [...].

  • 17.01.2013

    Vernissage mit den prämierten Fotos des "HZB-Photowalk"


    Am Freitag, dem 18. Januar um 15 Uhr lädt das HZB herzlich zur Vernissage der Ausstellung "HZB Science Photowalk - Augenblicke" ein. Im Sommer 2012 haben Hobbyfotografen bei einem Fotospaziergang durch die Labore und den Elektronenspeicherring BESSY II abwechslungsreiche, teilweise spektakuläre Eindrücke mit ihren Kameras einfangen. Mehr als 400 Momentaufnahmen sind dabei entstanden. Die besten 20 Motive wurden von einer Jury und von den HZB-Beschäftigten ausgewählt. Daraus ist eine Wanderausstellung entstanden, die ab 18. Januar erstmalig in den Fluren des BESSY-Bürogebäudes zu sehen ist. Bei der Eröffnung haben Sie auch Gelegenheit, sich mit den Hobbyfotografen und Jury-Mitglieder auszutauschen. Wir freuen uns auf Ihr Kommen.  [...].

  • With the help of computer simulation, researchers have been<br /> able to calculate the movements and forces between <br />water molecules (small, red-and-white dipoles), a ligand (shown in green),<br /> and the protein molecule's water-repellant hollow pocket. 16.01.2013

    Water fluctuations mediate lock-and-key fit

    Without water, life as we know, it would not exist. Nearly every biological binding process that takes place within a cell requires the presence of an aqueous environment. Here, tiny molecules called ligands fit like "keys" into their matching "locks" - docking sites on larger protein molecules. This in turn activates signals or leads to the production of some other substance by the cell. But what was previously unclear, was the part water plays in all this. Is water merely a passive transport medium or does it perform other, more active jobs as well? Now, HZB's own Prof. Dr. Joachim Dzubiella and a team of physicists have looked for answers to this question using a computer simulated model system. In the process, they discovered that water is capable of actively influencing the docking speed of the ligand through subtle interactions with other molecules' unique geometry and surface topography. Their findings could become important in drug delivery. [...].

  • 10.01.2013

    PD Dr. Silke Christiansen verstärkt Energieforschung


    Die Werkstoffwissenschaftlerin PD Dr. Silke Christiansen leitet ab Januar 2013 am Helmholtz-Zentrum Berlin das neue Institut „Nanoarchitekturen für die Energiewandlung“. Für den Aufbau des Instituts steht Frau Christiansen eine zusätzliche Finanzierung durch die Helmholtz-Rekrutierungsinitiative von 600.000 Euro pro Jahr über fünf Jahre zur Verfügung. Damit baut das HZB die Kompetenz im Bereich der Solarenergieforschung weiter aus. [...].

  • Prof. Dr. Klaus Lips07.01.2013

    Klaus Lips ist Professor an der Freien Universität Berlin


    Prof. Dr. Klaus Lips hat den Ruf auf die W2-Professur „Analytik für die Photovoltaik“ am Fachbereich Physik der Freien Universität Berlin angenommen und wurde im Dezember 2012 offiziell ernannt. Gleichzeitig ist Klaus Lips wissenschaftlicher Leiter des Zukunftsprojekts „EMIL“ am Helmholtz-Zentrum Berlin und wird in den nächsten Jahren am Elektronenspeicherring BESSY II ein einzigartiges Experimentierlabors für die in-situ Analytik von Dünnschichtsolarzellen aufbauen.  [...].