Kwon, Soonnam Kim, Tae Gun Choi, Won Kook Kang, Sang Ook Kim, Jeong Won 2024-01-20T12:34:06Z 2024-01-20T12:34:06Z 2021-09-01 2013-03-27 1944-8244 https://pubs.kist.re.kr/handle/201004/128229 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. English American Chemical Society PHOTOEMISSION Order-Disorder Transition in the Molecular Orientation during Initial Growth of Organic Thin Film Article 10.1021/am303290d 1 ACS Applied Materials & Interfaces, v.5, no.6, pp.1896 - 1901 ACS Applied Materials & Interfaces 5 6 1896 1901 scie scopus 000317031900004 2-s2.0-84875719901 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article PHOTOEMISSION photoelectron spectroscopy quantum mechanical calculation order-disorder transition molecular orientation