Mechanism of two-dimensional chiral growth of 6,13-pentacenequinone thin films on Si(1 1 1)

A. Al-Mahboob, J. T. Sadowski, T. Nishihara, Y. Fujikawa, Q. K. Xue, K. Nakajima, T. Sakurai

研究成果: Article査読

12 被引用数 (Scopus)

抄録

Thin film growth of 6,13-pentacenequinone (C24H12O2, PnQ) on Si(1 1 1)-7 × 7 at room temperature (RT) was studied by low-energy electron microscopy (LEEM) and ab initio density functional theory (DFT) calculations. Our experiments yielded direct microscopic observation of enantiomorphic evolution mechanism in the initial stage of the chiral-like growth of PnQ islands, under kinetic growth conditions. We observed that the faster growth direction aligns with the direction of easier molecule incorporation, or lowest kink formation energy, rather than along the lowest energy step. Real time observation of the growth and subsequent relaxation of island shape revealed that kinetically stiff direction differs from the thermodynamic one. This feature together with anisotropic mass incorporation determines the enantiomorphic evolution and rotational arrangement of crystallites during the growth of elongated organic molecules, like PnQ.

本文言語English
ページ(範囲)1311-1318
ページ数8
ジャーナルSurface Science
601
5
DOI
出版ステータスPublished - 2007 3月 1
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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