Synthesis of Liquid Crystal Silane-Functionalized Gold Nanoparticles and Their Effects on the Optical and ElectroOptic Properties of a Structurally Related Nematic Liquid Crystal

被引：32
作者：
Mirzaei, Javad [2 ]
Urbanski, Martin [3 ]
Kitzerow, Heinz-S. [3 ]
Hegmann, Torsten [1 ,2 ]
机构：
[1] Kent State Univ, Dept Chem & Biochem, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA
[2] Univ Manitoba, Dept Chem, Winnipeg, MB R3T 2N2, Canada
[3] Univ Paderborn, Dept Chem, D-33098 Paderborn, Germany
来源：
CHEMPHYSCHEM | 2014年 / 15卷 / 07期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
dispersions; electro-optics; functional silanes; liquid crystals; nanoparticles; QUANTUM DOTS; AU NANOPARTICLES; SIZE EVOLUTION; SOLID-STATE; BENT-CORE; ALIGNMENT; DESIGN; NANOCOMPOSITES; NANOCRYSTALS; NANOCLUSTERS;
D O I：
10.1002/cphc.201301052
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：
Chemically and thermally robust liquid crystal silane-functionalized gold nanoparticles (i.e. AuNP1-AuNP3) were synthesized through silane conjugation. Colloidal dispersions of these particles with mesogenic ligands that are structurally identical (as in AuNP1, AuNP2) or compatible (as in AuNP3) with molecules of the nematic liquid crystal (N-LC) host showed superior colloidal stability and dispersibility. The thermal, optical, and electro-optic behaviors of the N-LC composites at different concentrations of each gold nanoparticle were investigated. All dispersions showed lower values for the rotational viscosity and elastic constant, but only AuNP3 with a dissimilar structure between the nanoparticle ligand and the host displayed the most drastic thermal effects and overall strongest impact on the electro-optic properties of the host. The observed results were explained considering both the structure and the density of the surface ligands of each gold nanoparticle.
引用
收藏
页码：1381 / 1394
页数：14
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