Open AccessFormation and structure of artificial opal based on the colloidal silica sphere
Author(s) -
Minghai Li,
Ming Yi,
Liang Xu,
Zhangjun Yu,
Fuqiu Ma,
Huang Xin-Fan,
Kunji Chen
Publication year - 2003
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.52.1302
Subject(s) - spheres , materials science , transmission electron microscopy , structural coloration , photonic crystal , colloidal crystal , colloid , scanning electron microscope , colloidal silica , crystallization , reflection (computer programming) , colloidal particle , electron microscope , optics , nanotechnology , chemical engineering , optoelectronics , composite material , coating , physics , engineering , astronomy , computer science , programming language
Highly monodispersed colloidal silica spheres in submicrometer sizes were synthesized by a chemical method.The sizes of silica spheres measured by transmission electron microscopy range from 200 to 600 nm in diameter, and its distribution standard deviation is less than 5%.Scanning Electron Microscopy images show that using selfcrystallization of the silica spheres, we have successfully obtained artificial opals with the three dimensional closepacked, facecentered cubic (fcc) silica matrixes. Reflection spectra study reveals that artificial opals show (111) directional photonic bandgap features.