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

All Science Journal Classification (ASJC) codes

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

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