Premium
Photonic Crystals with Thermally Switchable Stop Bands Fabricated from Se@Ag 2 Se Spherical Colloids
Author(s) -
Jeong Unyong,
Xia Younan
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200462906
Subject(s) - template , amorphous solid , shell (structure) , colloid , materials science , photonics , photonic crystal , phase (matter) , nanotechnology , core (optical fiber) , optoelectronics , crystallography , chemistry , composite material , organic chemistry
Amorphous Se ( a ‐Se) as monodispersed spherical colloids are used as templates to synthesize core–shell particles comprising a ‐Se cores and Ag 2 Se shells (see picture). As the temperature is increased, the particles undergo two phase transitions, the second of which is reversible. By exploiting the reversibility between the semiconductive and superionic phases of the Ag 2 Se shell, photonic crystals with thermally switchable stop bands are made.