Enhanced switching behavior of iron oxide nanoparticle-doped liquid-crystal display

Woo Seung Koo, Hyung Koo Chung, Hong Gyu Park, Jae Jun Han, Hae Chang Jeong, Min Jae Cho, Dai Hyun Kim, Dae Shik Seo

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


It is well known that doping nanoparticles (NPs) in liquid crystals (LCs) can easily change the physical and electro-optical properties of LC mixture. In this paper, we demonstrate homogeneous, aligned nematic LC (N-LC) system dispersed in iron oxide (Fe2O3) NPs. The prepared Fe2O3 NPs have an average particle size of 50 nm. By changing the doping concentration of Fe2O3 NPs, we observed the characteristics of LC systems. Electrooptical (EO) characteristics included faster rising and falling times (2.14 ms and 10.24 ms, respectively) and lower driving voltage (1.45 V) compared with a pure N-LC cell. We demonstrated these results via the relationship between dielectric constant and LC device properties. The results were verified by software simulation based on general physical properties. Moreover, we observed that LC system with Fe2O3 NPs could be accomplished without capacitance hysteresis by capturing charged impurities. Superior performance of LC cell with Fe2O3 NPs indicates that the proposed LC system have strong potential for use in the production of advanced LC displays.

Original languageEnglish
Pages (from-to)8609-8614
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Issue number11
Publication statusPublished - 2014 Nov 1

Bibliographical note

Publisher Copyright:
Copyright © 2014 American Scientific Publishers All rights reserved.

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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