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Compositional Dependence of CdSe Quantum Dot Formation on Silicate Host Glass Composition
Author(s) -
Lee Yl Kwon,
Choi Yong Gyu,
Heo Jong,
Chung Woon Jin
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12617
Subject(s) - quantum dot , transmission electron microscopy , silicate , raman spectroscopy , absorption (acoustics) , absorption spectroscopy , materials science , silicate glass , chemical engineering , analytical chemistry (journal) , chemistry , mineralogy , nanotechnology , optics , composite material , chromatography , physics , engineering
Silicate glasses were synthesized with additional CdO and ZnSe of varying content. When CdO was added up to 3 mol% with the amount of ZnSe fixed at 1 mol%, absorption due to Se 2 − color centers significantly decreased and the color of glasses was bleached without any evidence of CdSe quantum dots ( QD s). However, characteristic absorption due to CdSe QD s appeared without additional heat treatment when the ZnSe content exceeded 1.5 mol%, whereas the CdO content was fixed at 1 mol%. Raman spectra and transmission electron microscopy verified the formation of CdSe QD s. The role of CdO and ZnSe in CdSe QD formation has been discussed in relation to their structural contribution within silicate glasses.