Liquid crystal alignment on carbonaceous surfaces with orientational order

被引:308
作者
Stöhr, J
Samant, MG
Lüning, J
Callegari, AC
Chaudhari, P
Doyle, JP
Lacey, JA
Lien, SA
Purushothaman, S
Speidell, JL
机构
[1] IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA
[2] IBM Corp, Thomas J Watson Res Ctr, Div Res, Yorktown Heights, NY 10598 USA
关键词
D O I
10.1126/science.1059866
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We used near-edge x-ray absorption fine structure (NEXAFS) spectroscopy to Link the orientational bond order at three carbonaceous surfaces-rubbed polyimide, ion beam-irradiated polyimide, and ion beam-irradiated diamond-like carbon films-with the direction of liquid crystal (LC) alignment on these surfaces. We show that, in general, LC alignment can be created on any carbonaceous substrate by inducing orientational order at its surface. Our results form the scientific basis for LC alignment layers consisting of amorphous carbon films in which orientational order near the surface is induced by a directional low-energy ion beam.
引用
收藏
页码:2299 / 2302
页数:4
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