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O: Oberflächenphysik
O 35: Organic films III
O 35.1: Vortrag
Donnerstag, 30. März 2006, 11:15–11:30, WIL B321
HREELS study of thin NTCDA/Ag(111) films upon different — •Dominique Hübner1, V. Shklover1, C. Stadler1, R. Fink2, and E. Umbach1 — 1Univ. Würzburg, Exp. Phys. II — 2Univ. Erlangen, Phys. Chem. II
High Resolution Electron Energy Loss Spectroscopy is a well established tool to investigate both electronic and vibronic excitation of thin films of large organic molecules. In addition to the vibronic and electronic properties, HREELS can provide structural information due to its sensitivity to molecular orientation. We investigated thin NTCDA films on Ag(111) surface with respect to different growth conditions (i.e. film thickness, growth rate, substrate temperature). The results are compared to FTIR, NEXAFS, and SPA-LEED measurements. For room temperature a Stranski-Krastanov growth with well ordered islands is observed whereas on cooled substrates a less well ordered Frank van der Merwe growth is observed.