Electro-optical characteristics of ZrO 2 nanoparticle doped liquid crystal on ion-beam irradiated polyimide layer

Hong Gyu Park, Hyung Jun Kim, Myoung Seong Kim, Il Hwan Lee, Dae Shik Seo

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

It is well known that doping liquid crystals (LCs) with nanoparticles can readily change the physical and electro-optical properties of LC mixture. In this paper, we report on how the electro-optical properties and thermal stability of an LC system were enhanced by dispersing zirconia (ZrO 2) nanoparticles in nematic LCs on ion-beam irradiated polyimide layers. Homogeneous LC alignment was achieved and ZrO 2/LC mixture was applied in twisted-nematic (TN) mode. The addition of ZrO 2 nanoparticles contributed to improvement of electro-optical properties in the TN LC cell by lowering voltage operation and decreasing response time. The TN LC cells with a ZrO 2 nanoparticle concentration of 2.0 wt% showed the lowest threshold voltage of 2.0 V and the fastest response time of 15.3 ms. This enhanced electro-optical performance was likely due to van-der waals interactions and the screening effect of the ZrO 2 nanoparticles in the LC medium. The thermal stability of the ZrO 2/LC mixture was also improved compared to a pristine LC system.

Original languageEnglish
Pages (from-to)5587-5591
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume12
Issue number7
DOIs
Publication statusPublished - 2012 Jul 1

Fingerprint

Liquid Crystals
polyimides
doped crystals
Polyimides
Nanoparticles
Liquid crystals
Ion beams
ion beams
liquid crystals
Ions
nanoparticles
Nematic liquid crystals
Optical properties
Thermodynamic stability
optical properties
Reaction Time
thermal stability
Hot Temperature
Threshold voltage
Zirconia

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

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abstract = "It is well known that doping liquid crystals (LCs) with nanoparticles can readily change the physical and electro-optical properties of LC mixture. In this paper, we report on how the electro-optical properties and thermal stability of an LC system were enhanced by dispersing zirconia (ZrO 2) nanoparticles in nematic LCs on ion-beam irradiated polyimide layers. Homogeneous LC alignment was achieved and ZrO 2/LC mixture was applied in twisted-nematic (TN) mode. The addition of ZrO 2 nanoparticles contributed to improvement of electro-optical properties in the TN LC cell by lowering voltage operation and decreasing response time. The TN LC cells with a ZrO 2 nanoparticle concentration of 2.0 wt{\%} showed the lowest threshold voltage of 2.0 V and the fastest response time of 15.3 ms. This enhanced electro-optical performance was likely due to van-der waals interactions and the screening effect of the ZrO 2 nanoparticles in the LC medium. The thermal stability of the ZrO 2/LC mixture was also improved compared to a pristine LC system.",
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Electro-optical characteristics of ZrO 2 nanoparticle doped liquid crystal on ion-beam irradiated polyimide layer. / Park, Hong Gyu; Kim, Hyung Jun; Kim, Myoung Seong; Lee, Il Hwan; Seo, Dae Shik.

In: Journal of Nanoscience and Nanotechnology, Vol. 12, No. 7, 01.07.2012, p. 5587-5591.

Research output: Contribution to journalArticle

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