Order鈥揇isorder Transition in the Molecular Orientation during Initial Growth of Organic Thin Film
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- 作者：Soonnam Kwon ; Tae Gun Kim ; Won Kook Choi ; Sang Ook Kang ; Jeong Won Kim
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：March 27, 2013
- 年：2013
- 卷：5
- 期：6
- 页码：1896-1901
- 全文大小：353K
- 年卷期：v.5,no.6(March 27, 2013)
- ISSN：1944-8252
文摘
We report on the identification of molecular orientation and its order鈥揹isorder 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.