Issue 12, 2011
From the journal:

Soft Matter

Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography

Hong-Gyu Park,a   Jong-Jin Lee,a   Ki-Young Dong,b   Byeong-Yun Oh,a   Young-Hwan Kim,a   Hae-Yoon Jeong,a   Byeong-Kwon Ju*b  and  Dae-Shik Seo*a  

* Corresponding authors

a Information Display Device Laboratory, Department of Electrical and Electronic Engineering, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul, Republic of Korea
E-mail: dsseo@yonsei.ac.kr

b Display and Nanosystem Laboratory, College of Engineering, Korea University, 5-1, Anam-Dong, Seongbuk-Gu, Seoul, Republic of Korea
E-mail: bkju@korea.ac.kr

Abstract

In this paper, nanoimprint lithography was utilized to transfer a nano-pattern (NP) onto a homeotropic polyimide (PI) surface for use in liquid crystal displays (LCDs). The nano-patterned silicon mold was fabricated by laser interference lithography. A NP PI layer acted as the homeotropic alignment layer to easily and uniformly align the liquid crystal (LC) molecules. A NP LC cell with a NP PI layer was successfully operated as a vertical aligned LCD, and its performance was evaluated. The threshold voltage and response time of the NP LC cell were 2.472 V and 22.7 ms, respectively. In addition, the NP LC cell was characterized by a high thermal budget. Therefore, the competitive performance of the NP LC cell could allow new approaches to replace the conventional rubbing process in display technology.

Graphical abstract: Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography

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Article information

DOI
https://doi.org/10.1039/C1SM05083D
Article type
Paper
Submitted
17 Jan 2011
Accepted
05 Apr 2011
First published
12 May 2011

Soft Matter, 2011,7, 5610-5614

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Homeotropic alignment of liquid crystals on a nano-patterned polyimide surface using nanoimprint lithography

H. Park, J. Lee, K. Dong, B. Oh, Y. Kim, H. Jeong, B. Ju and D. Seo, Soft Matter, 2011, 7, 5610 DOI: 10.1039/C1SM05083D

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