Plasmonic Nanoparticles & Anisotropic Nanoparticles

1. Plasmonic nanostructures

Au and Ag nanocrystals with defined size, shape and composition have been fabricated by the simple wet-chemical method, which is one of favoured routes toward the cost-effective large scale production of metal nanostructures. Possible applications like a surface plasmon polariton laser can be investigated. In addition, such hybrid structures can be applied as model system to study the plasmon effect of metal nanoparticles on the kinetics and efficiency of photoelectrocatalysis.

References

  1. S. Wu, A. W. Schell, M. Lublow, J. Kaiser, T. Aichele, S. Schietinger, F. Polzer, S. Kühn, X. Guo, O. Benson, M. Ballauff, Y. Lu, Colloid Polym. Sci. 2013, 291, 585-594.
  2. S. Wu, J. Kaiser, M. Drechsler, M. Ballauff, Y. Lu, Colloid Polym. Sci. 2013, 291, 231-237.
  3. A. Ott, S. Ring, G. Yin, W. Calvet, B. Stannowski, Y. Lu, R. Schlatmann, M. Ballauff, Nanotechnology 2014, 25, 455706.

2. Anisotropic particles

Special efforts have been made for the preparation of anisotropic particles, which show interesting properties in light scattering, plasmon absorption and catalysis. For example, dumbbell-shaped colloids with a size around 200 nm can be prepared by seeded-emulsion polymerization, which can be used as core for the further deposition of well defined water soluble polyelectrolyte brushes or stimuli-responsive shell. Anisotropic platelike gibbsite-polydopamine (G-PDA) core–shell particles show excellent colloidal stability and can form opal-like columnar crystal with iridescent Bragg reflection after modest centrifugation. Furthermore, G-PDA particles decorated with Au nanoparticles show efficient catalytic activity for the reduction of 4-nitrophenol and Rhodamine B (RhB) in the presence of borohydride.

References

  1. F. Chu, M. Siebenbürger, F. Polzer, C. Stolze, J. Kaiser, M. Hoffmann, N. Heptner, J. Dzubiella, M. Drechsler, Y. Lu, M. Ballauff, Macromol. Rapid Commun 2012, 33, 1042-1048.
  2. 2. F. Chu, Heptner, Y. Lu, M. Siebenbürger, P. Lindner, J. Dzubiella, M. Ballauff, Langmuir 2015, 31, 5992-6000.
  3. J. Cao, S. Mei, A. Ott, J. He, M. Ballauff, Y. Lu, Langmuir 2015, 31 (34), 9483–9491.