Inducing and erasing of defect state in polymerized microgel colloidal crystals via external stimuli

被引：19

作者：

Tang, Zhuo

Jia, Siyu

Yao, Lijuan

Guan, Ying ^{[1
]}

Zhang, Yongjun ^{[1
]}

机构：

[1] Nankai Univ, Coll Chem, Coinnovat Ctr Chem & Chem Engn Tianjin, Inst Polymer Chem,Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2018年 / 526卷

基金：

中国国家自然科学基金;

关键词：

Colloidal crystals; Artificial defects; Defect state; Microgels; Stimuli-responsive; TUNABLE PLANAR DEFECTS; 3D PHOTONIC CRYSTALS; OPTICAL-PROPERTIES; HYDROGEL MATRIX; KINETICS; NANOPARTICLES; PARTICLES; LIGHT; OPALS; GELS;

D O I：

10.1016/j.jcis.2018.04.067

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：

It remains a big challenge to introduce artificial extrinsic defects into colloidal crystals, which is critical for them to function as photonic crystals. The introduction of smart defects capable of responding to external stimuli is even harder. Here poly(N-isopropylacrylamide) (PNIPAM) microgel colloidal crystals doped with poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAM-AAc)) microgel were obtained by self-assembly of the two microgels with the same size. The crystalline structure was then stabilized in situ by photo-initiated polymerization of the vinyl groups on surface of the PNIPAM microgel. Defect state can be facilely induced and then erased reversibly by changing pH or temperature, taking advantage of the different response of the two microgels to external stimuli. The defect state can be induced and erased repeatedly. In addition, the response of the doped crystals is fast because of their inherent porous structure. (C) 2018 Elsevier Inc. All rights reserved.

引用

页码：83 / 89

页数：7