Dielectric Spectroscopy of Metal Nanoparticle Doped Liquid Crystal Displays Exhibiting Frequency Modulation Response

Kobayashi, Shunsuke; Miyama, T.; Nishida, Naoto; Sakai, Yoshio; Shiraki, Hiroyuki; Shiraishi, Yukihide; Toshima, Naoki

doi:10.1109/jdt.2006.872306

Cited by 78 publications

(35 citation statements)

References 8 publications

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“…In both thermal-and field-history-dependent modes, the threshold voltages were lower and the dielectric constants were higher than the values obtained for the pure N-LCs. The results of these findings, coupled with the reported frequency-modulation electro-optical response for N-LCs doped with metal nanoclusters at low particle concentrations (0.1-0.3 wt%), [40] demonstrate the potential usefulness of functionalized gold nanoclusters for the development of new or improved LC display technologies. [41] Considering the unique effects and the competition between all the possible interactions of the N-LC with the applied electric field and all the surfaces (of nanoclusters and alignment layers), the system appeared to be strikingly simple.…”

Section: Full Papermentioning

confidence: 80%

Unprecedented Dual Alignment Mode and Freedericksz Transition in Planar Nematic Liquid Crystal Cells Doped with Gold Nanoclusters

Kinkead

Hegmann

2008

Adv Funct Materials

138

132

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We demonstrate that alkylthiol‐capped gold nanoclusters doped into nematic liquid crystals (N‐LCs) with positive dielectric anisotropy give rise to an unprecedented dual alignment mode and electro‐optical response, which has a potential impact on current liquid crystal (LC) display technologies and N‐LC optical‐biosensor design. By fine‐tuning experimental conditions (temperature, electric field, and alignment), N‐LCs doped with gold nanoclusters can be aligned and electrically reoriented either like N‐LCs with a positive dielectric anisotropy in a planar cell or, alternatively, as N‐LCs with a negative dielectric anisotropy in a homeotropic cell, both at lower threshold voltages than the pure N‐LC.

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Section: Full Papermentioning

confidence: 80%

Unprecedented Dual Alignment Mode and Freedericksz Transition in Planar Nematic Liquid Crystal Cells Doped with Gold Nanoclusters

Kinkead

Hegmann

2008

Adv Funct Materials

138

132

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“…Liquid crystal dispersions containing various types of nano particles have been developed in the recent years [11,12]. Commonly used doping particles include metallic nano particles [13,14], semiconducting nano particles [15,16], ferroelectric nano particles [17,18], carbon-related nano particles [19,20] and inorganic nanoparticles [21]. Each type of these nano particles has its own effect on alteration of the LC material properties.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Electro-Optical Properties of Ceramic Nanoparticles Doped Liquid Crystals

Porov¹,

Chandel²,

Manohar³

2016

Transactions on Electrical and Electronic Materials

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Liquid crystals are important materials because of their applications in display technology and many other scientific applications. Different mixtures of liquid crystals and their doped samples have gained interest because a single liquid crystal compound cannot fulfill all the required parameters for the display application. The doping can be accomplished with dyes, polymers, or composite nanoparticles among other substance. The addition of nanoparticles can modify the physical properties of the host liquid crystal and enhances the performance of electro-optical devices. The present study is focused on investigations of possible changes in dielectric and electro optical properties of liquid crystals caused by doping with ceramic nanoparticles. Including smaller nanoparticles were found to be better candidates for use in suppressing the unwanted ion effects in liquid crystal displays.

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“…Doping nanomaterial in LCs enhances the properties of LCs. In literature, dierent type of nanomaterials are used for this purpose such as metallic nanoparticles [17], ferromagnetic nanoparticles [18], semiconducting nanoparticles [19] and carbon nanomaterials [1,20].…”

Section: Introductionmentioning

confidence: 99%

Electro-Optical Properties of Liquid Crystals Composite with Zinc Oxide Nanoparticles

et al. 2015

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In this study, zinc oxide (ZnO) nanoparticles were synthesized by spray pyrolysis method. The properties of ZnO nanoparticles are determined by means of scanning electron microscope (SEM), X-ray diraction (XRD) and UV-vis spectroscopy. Nematic liquid crystal mixture E7 was doped with 1, 2, and 4% ZnO. We investigate electrical and optical parameters of pure and doped nematic liquid crystal mixture E7. The experiments related to voltage dependence and light transmittance of the pure and doped E7 were carried out. The values of threshold voltage, total phase retardation and birefringence are examined. The results show that doping zinc oxide nanoparticles into liquid crystal mixture E7 decreases threshold voltage signicantly.

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Dielectric Spectroscopy of Metal Nanoparticle Doped Liquid Crystal Displays Exhibiting Frequency Modulation Response

Cited by 78 publications

References 8 publications

Unprecedented Dual Alignment Mode and Freedericksz Transition in Planar Nematic Liquid Crystal Cells Doped with Gold Nanoclusters

Unprecedented Dual Alignment Mode and Freedericksz Transition in Planar Nematic Liquid Crystal Cells Doped with Gold Nanoclusters

Dielectric and Electro-Optical Properties of Ceramic Nanoparticles Doped Liquid Crystals

Electro-Optical Properties of Liquid Crystals Composite with Zinc Oxide Nanoparticles

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