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O: Oberflächenphysik
O 17: Adsorption II
O 17.5: Vortrag
Dienstag, 28. März 2006, 12:15–12:30, TRE Phys
LT-STM study of electronic and vibronic properties of single C60 on Cu(111) and Ag(100). — •Anna Strózecka, Josef Mysliveček, and Bert Voigtländer — Institut für Schichten und Grenzflächen (ISG3), Forschungszentrum Jülich, D-52425 Jülich
A low temperature scanning tunneling microscope (LT-STM), due to its high stability, allows adressing single molecules on the surfaces. Density of States (DOS) spectrum of C60 on Cu(111), measured by STS (Scanning Tunneling Spectroscopy) technique, shows features corresponding to molecular orbitals of a free molecule. The shifting and splitting of the peaks indicate charge transfer from the substrate to the fullerene cage. Peaks in the IETS vibrational spectrum (Inelastic Electron Tunneling Spectroscopy) can be assigned to the vibrational modes of C60. Two different intramolecular modes are observed: Hg(ω2) and Hg(ω5).
The lateral manipulation was used to precicely control the position of C60 on Ag(100). The plot of the tip height during the manipulation shows that the buckyballs are pulled along the surface.