Electro-optical switching in twisted nematic samples doped with gold nanorods

被引：6

作者：

dos Santos, R. V. ^{[1
]}

de Melo, P. B. ^{[1
]}

Nunes, A. M. ^{[2
]}

Meneghetti, M. R. ^{[2
]}

Lyra, M. L. ^{[1
]}

de Oliveira, I. N. ^{[1
]}

机构：

[1] Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL, Brazil

[2] Univ Fed Alagoas, Inst Quim & Biotecnol, BR-57072970 Maceio, AL, Brazil

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2019年 / 295卷

关键词：

Nematic liquid crystals; Reorientation; Gold nanorods; LIQUID-CRYSTALS; PARAMETERS; MODULATION; DISPERSION; DISPLAY;

D O I：

10.1016/j.molliq.2019.111704

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present study is devoted to the investigation of reorientation properties of 8CB liquid crystal samples doped with gold nanorods with distinct aspect ratios. By using an optical experimental setup to probe the electro-optic response of twist cells under an AC electric field, we measure the characteristic switch times and Freedericksz threshold of doped nematic liquid crystals. The effects associated with the surface plasmon resonance and disorder induced by the metallic guest particles are analyzed. Further, we exploit the Gooch-Tarry conditions and Mauguin minima to account the thermal dependence of nematic birefringence in pristine and doped samples. Our results show that the electro-optical and thermal parameters of twisted nematic cells are strongly affected by the addition of gold nanorods. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：8

共 41 条

[1] Enhanced photorefractive effect in liquid crystal structures co-doped with semiconductor quantum dots and metallic nanoparticles [J].

Anczykowska, A. ;

Bartkiewicz, S. ;

Nyk, M. ;

Mysliwiec, J. .

APPLIED PHYSICS LETTERS, 2011, 99 (19)

[2] Nematics with quenched disorder: What is left when long range order is disrupted? [J].

Bellini, T ;

Buscaglia, M ;

Chiccoli, C ;

Mantegazza, F ;

Pasini, P ;

Zannoni, C .

PHYSICAL REVIEW LETTERS, 2000, 85 (05) :1008-1011

[3] New aspects of gold nanorod formation via seed-mediated method [J].

da Silva, Monique G. A. ;

Nunes, Abner M. ;

Meneghetti, Simoni M. P. ;

Meneghetti, Mario R. .

COMPTES RENDUS CHIMIE, 2013, 16 (07) :640-650

[4] Thermo-optical properties and nonlinear optical response of smectic liquid crystals containing gold nanoparticles [J].

de Melo, P. B. ;

Nunes, A. M. ;

Omena, L. ;

do Nascimento, S. M. S. ;

da Silva, M. G. A. ;

Meneghetti, M. R. ;

de Oliveira, I. N. .

PHYSICAL REVIEW E, 2015, 92 (04)

[5] Effect of nonmesogenic impurities on the order of the nematic to smectic-A phase transition in liquid crystals [J].

Denolf, Katleen ;

Van Roie, Bert ;

Glorieux, Christ ;

Thoen, Jan .

PHYSICAL REVIEW LETTERS, 2006, 97 (10)

[6]

Deuling H.J., 1978, SOLID STATE PHYS S14, V14

[7] OPTICAL-PROPERTIES OF TWISTED NEMATIC LIQUID-CRYSTAL STRUCTURES WITH TWIST ANGLES LESS THAN 90 DEGREES [J].

GOOCH, CH ;

TARRY, HA .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1975, 8 (13) :1575-1584

[8] Mean-field theory of a nematic liquid crystal doped with anisotropic nanoparticles [J].

Gorkunov, Maxim V. ;

Osipov, Mikhail A. .

SOFT MATTER, 2011, 7 (09) :4348-4356

[9] Metal Nanoparticle Based All-Optical Photothermal Light Modulator [J].

Heber, Andre ;

Selmke, Markus ;

Cichos, Frank .

ACS NANO, 2014, 8 (02) :1893-1898

[10] Optical representation of binary data based on both intensity and phase modulation with a twisted-nematic liquid-crystal display for holographic digital data storage [J].

Jang, JS ;

Shin, DH .

OPTICS LETTERS, 2001, 26 (22) :1797-1799

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