Monodisperse, high refractive index, highly charged ZnS colloids self assemble into crystalline colloidal arrays

被引：33

作者：

Luo, Jia ^{[1
]}

Qu, Dan ^{[1
]}

Tikhonov, Alexander ^{[1
]}

Bohn, Justin ^{[1
]}

Asher, Sanford A. ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2010年 / 345卷 / 02期

基金：

美国国家科学基金会;

关键词：

Monodisperse; Surface charge; High refractive index; Photonic crystal; PHOTONIC BAND-GAPS; SPHERICAL COLLOIDS; CONCENTRATED-SOLUTIONS; CORE-SHELL; DIFFRACTION; PARTICLES; GELATIN; LIGHT; FILMS; CDS;

D O I：

10.1016/j.jcis.2010.02.002

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：

We developed an efficient synthesis of monodisperse, highly surface charged, high refractive index ZnS spherical particles by using a gel-sol method. Concentrated solutions of zinc-ammonia-NTA (nitrilotriacetic acid) were reacted with thioacetamide in the presence of gelatin which stabilized the growing particles. We dramatically increased the particle surface charge density by condensing silica and silylated phosphonate groups on the particle surface. These monodisperse highly charged ZnS particles are somewhat porous and have a refractive index of 1.868. These are the highest refractive index, monodisperse, highly charged spherical particles to self assemble into non-close-packed crystalline colloidal arrays which Bragg diffract light. (c) 2010 Elsevier Inc. All rights reserved.

引用

页码：131 / 137

页数：7

共 67 条

[1] EXCHANGE OF NA+ FOR SILANOLIC PROTONS OF SILICA [J].