標題: RUBBING-INDUCED MOLECULAR ALIGNMENT ON AN ORIENTING LAYER OF POLYIMIDE WITH AND WITHOUT ALKYL SIDE-CHAINS
作者: HUANG, JY
LI, JS
JUANG, YS
CHEN, SH
交大名義發表
光電工程學系
National Chiao Tung University
Department of Photonics
關鍵字: LIQUID CRYSTAL;RUBBED POLYMER;OPTICAL 2ND-HARMONIC GENERATION;ATOMIC FORCE MICROSCOPY;PRETILT ANGLE
公開日期: 1-六月-1995
摘要: The rubbing-induced molecular alignment on a surface of polyimide with and without branched alkyl side chains was investigated with optical phase retardation measurement, atomic force microscopy (AFM), and second-harmonic generation (SHG). Our AFM results suggest that the rubbing-induced microgrooves play a minor role in aligning liquid crystal (LC) molecules. From the SHG studies, the detailed in-plane distribution of a LC monolayer on rubbed polymers was deduced, and the polar angle of the LC molecules was found to vary with the rubbing strength exerted on an alkyl-branched polymer. The polar angle of the LC monolayer on an alkyl-branchless main-chain polyimide film was observed to be independent of the rubbing strength. We propose a simple molecular model to reconcile these experimental results.
URI: http://dx.doi.org/10.1143/JJAP.34.3163
http://hdl.handle.net/11536/1878
ISSN: 0021-4922
DOI: 10.1143/JJAP.34.3163
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 34
Issue: 6A
起始頁: 3163
結束頁: 3169
顯示於類別:期刊論文


文件中的檔案:

  1. A1995RF66400040.pdf