Order-Disorder Transition in the Molecular Orientation during Initial Growth of Organic Thin Film

Authors
Kwon, SoonnamKim, Tae GunChoi, Won KookKang, Sang OokKim, Jeong Won
Issue Date
2013-03-27
Publisher
American Chemical Society
Citation
ACS Applied Materials & Interfaces, v.5, no.6, pp.1896 - 1901
Abstract
We report on the identification of molecular orientation and its order-disorder transition during the initial growth of 1,3-bis(N-carbazolyl)benzene (mCP) thin films on a highly ordered pyrolytic graphite (HOPG) surface by using photoelectron spectroscopy (PES). Theoretical PES amplitudes using a quantum mechanical calculation that adapts independent atomic center approximation (IAC) were calculated to compare with experimental observations. At low coverage, an equilibrium orientation of isolated adsorbate was estimated. As the coverage increases, the interaction between adsorbates becomes dominant and raises the disorder, which results in changes in the PES shapes as well as the line broadening of each peak.
Keywords
PHOTOEMISSION; PHOTOEMISSION; photoelectron spectroscopy; quantum mechanical calculation; order-disorder transition; molecular orientation
ISSN
1944-8244
URI
https://pubs.kist.re.kr/handle/201004/128229
DOI
10.1021/am303290d
Appears in Collections:
KIST Article > 2013
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