• 
  Lebedev, A.M.; Sukhanov, L.P.; Brzhezinskaya, M.M.; Men'shikov, K.A.; Svechnikov, N.Y.; Chumakov, R.G.; Stankevich, V.G.: Experimental observation of C₆₀F₁₈ molecules orientation onto nickel single crystal (100) surface. Journal of Surface Investigation 6 (2012), p. 833-839

10.1134/S1027451012100114

Abstract:
The angular dependence of near edge Xray absorption fine structure (NEXAFS) spectra has been obtained in the vicinity of carbon and fluorine 1s absorption edges in a monolayer film of polar fullerene fluoride (C60F18) molecules on a Ni(100) substrate. The fine structure of the spectra has been identified according to experimental data via calculations based on the density functional theory, and the angular dependence of the spectra has been explained. The orientations of structural molecular fragments are determined from the angular dependence of the NEXAFS spectra. It is demonstrated that the electric dipole moment of a C60F18 molecule is oriented along the normal to the substrate surface with an accuracy of 5°.