In:
Crystal Research and Technology, Wiley, Vol. 45, No. 10 ( 2010-10), p. 1069-1074
Abstract:
It is essential to passivate one‐dimensional (1D) nanostructures with insulating materials to avoid crosstalking as well as to protect them from contamination and oxidation. The structure and influence of thermal annealing on the photoluminescence properties of ZnS‐core/SiO 2 ‐shell nanowires synthesized by the thermal evaporation of ZnS powders followed by the sputter deposition of SiO 2 were investigated. Transmission electron microscopy and X‐ray diffraction analyses revealed that the cores and shells of the core‐shell nanowires were single crystal zinc blende‐type ZnO and amorphous SiO 2 , respectively. Photoluminescence (PL) measurement showed that the core‐shell nanowires had a green emission band centered at around 525 nm with a shoulder at around 385 nm. The PL emission of the core‐shell nanowires was enhanced in intensity by annealing in an oxidative atmosphere and further enhanced by subsequently annealing in a reducing atmosphere. Also the origin of the enhancement of the green emission by annealing is discussed based on the energy‐dispersive X‐ray spectroscopy analysis results. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Type of Medium:
Online Resource
ISSN:
0232-1300
,
1521-4079
DOI:
10.1002/crat.201000304
Language:
English
Publisher:
Wiley
Publication Date:
2010
detail.hit.zdb_id:
1480828-6
