Optical characterization of colloidal silica crystals with controlled size microspheres

被引：12

作者：

Chaouachi, A. ^{[1
]}

Chtourou, R. ^{[2
]}

M'nif, A. ^{[1
]}

Hamzaoui, A. H. ^{[1
]}

机构：

[1] CNRSM, Natl Ctr Res Mat Sci, Useful Mat Valorizat Lab, Soliman 8027, Tunisia

[2] Res & Technol Ctr Energy CRTEn, Lab Photovolta, Soliman 8027, Tunisia

来源：

MATERIALS LETTERS | 2014年 / 116卷

关键词：

Optical materials and properties; Sol-gel preparation; Colloidal silica; Photonic band gap; PHOTONIC CRYSTALS; SPHERES; GAP;

D O I：

10.1016/j.matlet.2013.11.069

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Colloidal multilayer structures of silica microspheres (or silica opals) have been developed on glass slides using vertical deposition technique. Effect of annealing on structural properties of colloidal silica was investigated using FTIR spectroscopy. Morphology of particles was characterized using atomic force microscopy (AFM). AFM micrographs illustrate the uniform size distribution of silica microspheres in colloidal crystal. With the variation of molarities of reactants, sizes of particles are controlled. Photonic band gap calculations are carried out to show pseudo-photonic band gap of silica opals. Optical characterization proves photonic character of colloidal crystals. It is noticed that forbidden photonic band gap depends on size of spheres forming colloidal crystal. Materials with controllable interesting photonic property are realized by easy and non expensive route and modifying position of stop-band allows to improved engineering of colloidal photonic crystals. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：420 / 424

页数：5

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