DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2012 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

DS: Fachverband Dünne Schichten

DS 37: Poster II: Focused electron beam induced processing for the fabrication of nanostructures (focused session, jointly with O); Nanoengineered thin films; Layer properties: electrical, optical, and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM, XPS, SIMS, RBS,..); Application of thin films

DS 37.15: Poster

Thursday, March 29, 2012, 15:00–17:00, Poster E

Thin C58 films on Au(111)Noelia Bajales1, Stefan Schmaus1, Thoshio Miyamachi1, Wulf Wulfhekel1, Melani Stendel2, Alexej Bagrets2, Christian Seiler2, Ferdinand Evers2, Seyithan Ulas3, Bastian Kern3, •Artur Böttcher3, and Manfred Kappes31KIT, Physikalisches Institut, Karlsruhe, Germany — 2KIT, Institut für Theorie der Kondensierten Materie, Karlsruhe, Germany — 3KIT, Institut für Physikalische Chemie, Karlsruhe, Germany

C58 cages have been deposited on the Au(111) surface by means of low-energy cluster beam deposition technique. The properties of thin C58 films have been studied by means of scanning tunneling microscopy, 4K-STM, elastic tunneling spectroscopy, STS, ultraviolet photoionization spectroscopy, UPS, and thermal desorption spectroscopy, TDS. In the very initial deposition stages the individual C58 cages occupy the elbows of the herringbone reconstruction preferentially. In contrast to highly symmetric C60 cages individual C58 cages exhibit internal asymmetric structures. Further film growth proceeds via formation of dimers and trimers which act as nucleation centers and govern the growth of 2D and 3D islands. Individual cages can not be desorbed from the surface, i.e. their estimated binding energy overcomes  3 eV. For coverages >0.5 MLE detectable emission of C58 cages peaked at  820 K has been observed. This desorption band reveals the thermal decomposition of the quasi-covalent intercage bonds, C58-C58. STS reveals highly asymmetric distribution of the local density of HOMO and LUMO states. For thick C58 films a gap of 1.2 eV has been derived.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2012 > Berlin