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Thermal annealing behavior of silica‐coated coaxial nanowires
Author(s) -
Kim Hyoun Woo,
Lee Jong Woo,
Lee Changmu,
Kebede Mesfin A.
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1257
Subject(s) - materials science , annealing (glass) , nanowire , amorphous solid , coaxial , photoluminescence , nanostructure , amorphous silica , thermal , chemical engineering , nanotechnology , composite material , optoelectronics , crystallography , chemistry , engineering , electrical engineering , physics , meteorology
The effects of thermal annealing on structural and optical properties of MgO‐core–silica (SiO x )‐shell nanowires have been investigated. The annealed nanostructures consisted of a crystalline MgO core surrounded by an amorphous SiO x shell layer, whereas the shell surface had become rough and an Mg 2 SiO 4 phase appeared by annealing at a sufficiently high temperature of 800°C. Photoluminescence (PL) measurements of annealed MgO‐core/SiO x ‐shell nanowires indicated that the overall intensities increased on increasing the annealing temperature, with the overall shapes of the emission spectra being independent of the annealing temperature from 600 to 1000°C. This study provides an insight into the annealing studies involving various coaxial nanowires. Copyright © 2008 John Wiley & Sons, Ltd.