期刊
SURFACE SCIENCE
卷 600, 期 5, 页码 1077-1084出版社
ELSEVIER
DOI: 10.1016/j.susc.2005.12.042
关键词
X-ray absorption; X-ray photoelectron spectroscopy; phthalocyanine; morphology; molecular orientation
We report on near-edge X-ray absorption and X-ray photoemission experiments for the large pi-conjugated organic molecule metal-free phthalocyanine (H2Pc) on two different single crystal surfaces. Results from H2Pc deposited on Ag(1 1 1) at 300 K show a clear linear dichroism indicating that the film grows as islands with the molecules lying essentially flat. On a Ni3Al(1 1 1) and a cooled Ag(1 1 1) substrate, however, the molecules form a homogeneous film and have an average tilt angle of 45-60 degrees. The different film structure is the result of a different molecule-substrate interaction. (c) 2006 Elsevier B.V. All rights reserved.
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