Authors: Changhyun Jin Hyunsoo Kim Chanseok Hong Hyoun Woo Kim Chongmu Lee
Publish Date: 2010/03/18
Volume: 100, Issue: 1, Pages: 151-157
Abstract
We have fabricated cupric oxide CuOcore/silica SiO x shell nanowires by using a twostep process thermal oxidation and sputtering The structure and photoluminescence PL properties of the core/shell nanowires has been investigated by using scanning electron microscopy transmission electron microscopy Xray diffraction and PL analysis techniques The CuO cores and the SiO x shells of the assynthesized nanowires have crystalline monoclinic CuO and amorphous SiO x structures respectively The PL emission intensity of the CuOcore/SiO x shell nanowires has been increased but the emission peak position has not been nearly shifted by annealing in a nitrogen atmosphere whereas the emission peak position has been shifted a lot from 510 to around 650 nm as well as the emission intensity has been increased by annealing in an oxygen atmosphere In addition the origin of the PL enhancement in the CuOcore/SiO x shell nanowires by annealing and the growth mechanism of the CuO nanowires have been discussed
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