Homogeneous liquid crystal alignment on poly(vinylidene fluoride-trifluoroethylene) films subjected to ion-beam irradiation

Hong Gyu Park; Young Soo Park; Kyoung Yong Park; Min Sun Kim; Hae Chang Jeong; Dae Shik Seo

doi:10.1080/02678292.2015.1044578

Homogeneous liquid crystal alignment on poly(vinylidene fluoride-trifluoroethylene) films subjected to ion-beam irradiation

Hong Gyu Park, Young Soo Park, Kyoung Yong Park, Min Sun Kim, Hae Chang Jeong, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We demonstrate homogeneous and uniform liquid crystal (LC) alignment on poly(vinylidene fluoride-trifluoroethylene) [PVDF-TrFE] films using ion-beam (IB) irradiation and a performance improvement of twisted nematic (TN) cells using IB-irradiated PVDF-TrFE films. Spontaneous ferroelectricity of the PVDF-TrFE films was modified by IB irradiation, which affected the LC alignment properties. The variation in the pre-tilt angles of the LC molecules on the IB-irradiated PVDF films is attributed to surface reformation, including defluorination and oxidation because the pre-tilt angles of LC molecules can be controlled by adjusting the fluorine content. The results of contact angle measurements supported this phenomenon. A 58% reduction in the switching voltage was observed for TN cells, indicating that the IB-irradiated PVDF-TrFE films are a promising candidate for use as an alignment layer.

Original language	English
Pages (from-to)	1262-1268
Number of pages	7
Journal	Liquid Crystals
Volume	42
Issue number	9
DOIs	https://doi.org/10.1080/02678292.2015.1044578
Publication status	Published - 2015 Sep 2

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1080/02678292.2015.1044578

Fingerprint Dive into the research topics of 'Homogeneous liquid crystal alignment on poly(vinylidene fluoride-trifluoroethylene) films subjected to ion-beam irradiation'. Together they form a unique fingerprint.

Cite this

@article{3e188af3314347449369ed49b257f966,

title = "Homogeneous liquid crystal alignment on poly(vinylidene fluoride-trifluoroethylene) films subjected to ion-beam irradiation",

abstract = "We demonstrate homogeneous and uniform liquid crystal (LC) alignment on poly(vinylidene fluoride-trifluoroethylene) [PVDF-TrFE] films using ion-beam (IB) irradiation and a performance improvement of twisted nematic (TN) cells using IB-irradiated PVDF-TrFE films. Spontaneous ferroelectricity of the PVDF-TrFE films was modified by IB irradiation, which affected the LC alignment properties. The variation in the pre-tilt angles of the LC molecules on the IB-irradiated PVDF films is attributed to surface reformation, including defluorination and oxidation because the pre-tilt angles of LC molecules can be controlled by adjusting the fluorine content. The results of contact angle measurements supported this phenomenon. A 58% reduction in the switching voltage was observed for TN cells, indicating that the IB-irradiated PVDF-TrFE films are a promising candidate for use as an alignment layer.",

author = "Park, {Hong Gyu} and Park, {Young Soo} and Park, {Kyoung Yong} and Kim, {Min Sun} and Jeong, {Hae Chang} and Seo, {Dae Shik}",

year = "2015",

month = sep,

day = "2",

doi = "10.1080/02678292.2015.1044578",

language = "English",

volume = "42",

pages = "1262--1268",

journal = "Liquid Crystals",

issn = "0267-8292",

publisher = "Taylor and Francis Ltd.",

number = "9",

}

TY - JOUR

T1 - Homogeneous liquid crystal alignment on poly(vinylidene fluoride-trifluoroethylene) films subjected to ion-beam irradiation

AU - Park, Hong Gyu

AU - Park, Young Soo

AU - Park, Kyoung Yong

AU - Kim, Min Sun

AU - Jeong, Hae Chang

AU - Seo, Dae Shik

PY - 2015/9/2

Y1 - 2015/9/2

N2 - We demonstrate homogeneous and uniform liquid crystal (LC) alignment on poly(vinylidene fluoride-trifluoroethylene) [PVDF-TrFE] films using ion-beam (IB) irradiation and a performance improvement of twisted nematic (TN) cells using IB-irradiated PVDF-TrFE films. Spontaneous ferroelectricity of the PVDF-TrFE films was modified by IB irradiation, which affected the LC alignment properties. The variation in the pre-tilt angles of the LC molecules on the IB-irradiated PVDF films is attributed to surface reformation, including defluorination and oxidation because the pre-tilt angles of LC molecules can be controlled by adjusting the fluorine content. The results of contact angle measurements supported this phenomenon. A 58% reduction in the switching voltage was observed for TN cells, indicating that the IB-irradiated PVDF-TrFE films are a promising candidate for use as an alignment layer.

AB - We demonstrate homogeneous and uniform liquid crystal (LC) alignment on poly(vinylidene fluoride-trifluoroethylene) [PVDF-TrFE] films using ion-beam (IB) irradiation and a performance improvement of twisted nematic (TN) cells using IB-irradiated PVDF-TrFE films. Spontaneous ferroelectricity of the PVDF-TrFE films was modified by IB irradiation, which affected the LC alignment properties. The variation in the pre-tilt angles of the LC molecules on the IB-irradiated PVDF films is attributed to surface reformation, including defluorination and oxidation because the pre-tilt angles of LC molecules can be controlled by adjusting the fluorine content. The results of contact angle measurements supported this phenomenon. A 58% reduction in the switching voltage was observed for TN cells, indicating that the IB-irradiated PVDF-TrFE films are a promising candidate for use as an alignment layer.

UR - http://www.scopus.com/inward/record.url?scp=84942981746&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84942981746&partnerID=8YFLogxK

U2 - 10.1080/02678292.2015.1044578

DO - 10.1080/02678292.2015.1044578

M3 - Article

AN - SCOPUS:84942981746

VL - 42

SP - 1262

EP - 1268

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 9

ER -