期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 704, 期 1-3, 页码 163-168出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2004.01.068
关键词
Alq3; FTIR spectroscopy; scanning tunneling microscopy; scanning tunneling spectroscopy; conductivity; planar metal-organic nanocomposites
FTIR spectroscopy and scanning tunneling microscopy (STM) were used to study the molecular organization and morphology of vacuum deposited (VD) thin films of tris (8-hydroxyquinoline) aluminum (Alq3) from metal-organic planar light-emitting nanocomposites consisting of gold island films and VD Alq3 film. It was found that thermal evaporation in vacuum does not cause dissociation of Alq3, and that the obtained films are essentially amorphous. Reflection-absorption (RA) IR spectra show predominantly perpendicular orientation of quinoline groups of Alq3 molecules in the films towards the substrate. With the STM method, a thickness-dependent structure of the films was found and the first near-surface layers of Alq3 films were characterized. It has been revealed that VD deposited Alq3 films of small thickness (5-15 nm) consist of molecular domains with a particular orientation along the Au[112] direction. (C) 2004 Elsevier B.V. All rights reserved.
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