Improving the optical properties of vinyl-functionalized silica colloidal crystals by thermal annealing

被引：2

作者：

Deng, Tian-Song ^{[1
]}

Zhang, Jun-Yan ^{[1
]}

Zhu, Kong-Tao ^{[1
]}

Zhang, Qi-Feng ^{[1
]}

Wu, Jin-Lei ^{[1
]}

机构：

[1] Peking Univ, Key Lab Phys & Chem Nanodeviees, Dept Elect, Beijing 100871, Peoples R China

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2010年 / 118卷 / 1382期

关键词：

Vinyl-functionalized; Silica spheres; Colloidal crystals; Self-assembled; Surface-modified; Bandgap; PHOTONIC CRYSTALS; PARTICLE ARRAYS; SIO2; SPHERES; FABRICATION; THICKNESS; FILMS;

D O I：

10.2109/jcersj2.118.862

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Three-dimensional vinyl-functionalized silica colloidal crystals (VFS-CCs), which the attenuation of the photonic bandgap could be significantly improved by thermal annealing, were fabricated by a gravity sedimentation process using monodisperse vinyl-functionalized silica spheres. With the increase of the annealing temperature from 60 to 140 degrees C, the attenuation of the bandgap had more than 40% increase. The SEM images and optical UV-vis-NIR spectra confirmed the high quality of the VFS-CCs. Fourier transform infrared (FT-IR) spectra and thermo-gravimetric analysis (TGA) of the vinyl-functionalized silica spheres demonstrated that the optimal annealing temperature of the VFS-CCs was about 120 degrees C, slightly lower than the oxidation temperature of the vinyl groups. This work provides a simple and controllable method for fabricating and optimizing the optical properties of the surface-modified colloidal crystals. (C) 2010 The Ceramic Society of Japan. All rights reserved.

引用

页码：862 / 866

页数：5

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