Electro-optical effect of gold nanoparticle dispersed in nematic liquid crystals

Che Ju Hsu, Li Jyuan Lin, Mao Kun Huang, Chi-Yen Huang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The electro-optical performance of nematic liquid crystals (NLCs) dispersed with gold nanoparticles (GNPs) was investigated in this study. The addition of a small amount of GNP dopant decreased the threshold voltage for LC reorientation due to the decreased elastic constant and increased dielectric anisotropy of the LC mixture. The response time of the LC cell was decreased with the addition of tiny amounts of GNPs because of decrease in rotational viscosity of LCs. The doped GNPs also shorten LC reorientation angle during voltage switching, further decreasing the response time of the LC cell. The addition of high amounts of GNPs slowed down the response time of the LC cell, because excess GNPs aggregated and formed networks in the cell, thus disturbing LC alignment and hindering LC reorientation. The measured dielectric spectra of the GNP-LC mixture revealed that the addition of GNPs decreased the relaxation time constant of the LCs. This result confirmed that the GNP dopant decreased the rotational viscosity and elastic constant of the LCs.

Original languageEnglish
Article number287
JournalCrystals
Volume7
Issue number10
DOIs
Publication statusPublished - 2017 Oct 1

Fingerprint

electro-optical effect
Nematic liquid crystals
Electrooptical effects
Gold
liquid crystals
gold
Nanoparticles
nanoparticles
retraining
Elastic constants
cells
elastic properties
Doping (additives)
Viscosity
viscosity
Threshold voltage
threshold voltage
Relaxation time
time constant
Anisotropy

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Inorganic Chemistry

Cite this

Hsu, Che Ju ; Lin, Li Jyuan ; Huang, Mao Kun ; Huang, Chi-Yen. / Electro-optical effect of gold nanoparticle dispersed in nematic liquid crystals. In: Crystals. 2017 ; Vol. 7, No. 10.
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Electro-optical effect of gold nanoparticle dispersed in nematic liquid crystals. / Hsu, Che Ju; Lin, Li Jyuan; Huang, Mao Kun; Huang, Chi-Yen.

In: Crystals, Vol. 7, No. 10, 287, 01.10.2017.

Research output: Contribution to journalArticle

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T1 - Electro-optical effect of gold nanoparticle dispersed in nematic liquid crystals

AU - Hsu, Che Ju

AU - Lin, Li Jyuan

AU - Huang, Mao Kun

AU - Huang, Chi-Yen

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AB - The electro-optical performance of nematic liquid crystals (NLCs) dispersed with gold nanoparticles (GNPs) was investigated in this study. The addition of a small amount of GNP dopant decreased the threshold voltage for LC reorientation due to the decreased elastic constant and increased dielectric anisotropy of the LC mixture. The response time of the LC cell was decreased with the addition of tiny amounts of GNPs because of decrease in rotational viscosity of LCs. The doped GNPs also shorten LC reorientation angle during voltage switching, further decreasing the response time of the LC cell. The addition of high amounts of GNPs slowed down the response time of the LC cell, because excess GNPs aggregated and formed networks in the cell, thus disturbing LC alignment and hindering LC reorientation. The measured dielectric spectra of the GNP-LC mixture revealed that the addition of GNPs decreased the relaxation time constant of the LCs. This result confirmed that the GNP dopant decreased the rotational viscosity and elastic constant of the LCs.

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