Growth mode and molecular orientation of phthalocyanine molecules on metal single crystal substrates: A NEXAFS and XPS study
2006; Elsevier BV; Volume: 600; Issue: 5 Linguagem: Inglês
10.1016/j.susc.2005.12.042
ISSN1879-2758
AutoresSatoshi Kera, Maria Benedetta Casu, Karl Rudolf Bauchspieß, David Batchelor, Thomas Schmidt, E. Umbach,
Tópico(s)Surface Chemistry and Catalysis
ResumoWe report on near-edge X-ray absorption and X-ray photoemission experiments for the large π-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°. The different film structure is the result of a different molecule–substrate interaction.
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