Nucleation Density and Shape of Submonolayer Two-Dimensional Islands of Diphenyl Dinaphthothienothiophene in Vacuum Deposition

Yoshiaki Hattori, Yoshinari Kimura, Masatoshi Kitamura

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Submonolayer two-dimensional (2D) islands of diphenyl dinaphthothienothiophene with various shapes and densities (N) were formed on a SiO2/Si substrate by controlling substrate temperature and the surface treatment for SiO2 in vacuum deposition to investigate the growth mechanism on the basis of their morphology. The statistical analysis shows that the 2D islands have complex shapes when N is small, and there is a constant relationship between N and the shape complexity of the 2D islands, regardless of the deposition conditions. Because the surface morphology is determined by diffusion coefficients for admolecules on a substrate surface (Ds) and along the edge of a 2D island (Dedg), the relationship between (N, shape complexity) and (Ds, Dedg) is studied. The statistical analysis indicates that Dedg is almost independent of the surface conditions and is instead determined by interactions with molecules constructing the 2D island. Therefore, Dedg is considered as a material-dependent parameter to control the morphology for growing high-quality films in vacuum deposition.

本文言語English
ページ(範囲)1064-1069
ページ数6
ジャーナルJournal of Physical Chemistry C
124
1
DOI
出版ステータスPublished - 2020 1月 9
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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