[20a-E202-1~10] 12.1 Fabrications and Structure Controls

[20a-E202-9] Atomic Groove Epitaxy on Uniaxially Aligned Poly(tetrafluoroethylene) Surface

〇Toshihiko Tanaka^1,2,3, Tetsuya Aoyama², Masamitsu Ishitobi³, Miei Sato⁴, H-S So⁴, Junna Kawaguchi⁴, Shinya Matsumoto^2,4, Hirohito Umezawa¹, Atsuya Muranaka², Masanobu Uchiyama^2,5 (1.NIT Fukushima Coll., 2.RIKEN CPR, 3.ASET, 4.Yokohama Nat.Univ., 5.Univ. of Tokyo)

Keywords:poly(tetrafluoroethylene), molecular orientation, epitaxy

The first author has been fascinated by an PTFE alignment layer since he saw a letter by Wittmann and Smith in 1991. Its two remarkable features are quite important: one is a wide variety of the materials oriented on it and the other is some cases where an extremely high degree of orientation can be achieved. We have been investigating the mechanism by a molecular dynamics simulation and have concluded that a negatively charged shallow atomic groove between two adjacent PTFE chains orients linear molecules by trapping them along the the groove. Furthermore it also sometimes provides the films containing highly oriented J aggregates. We will discuss the significance of them.