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Title: Morphology-dependent luminescence from ZnO nanostructures - An X-ray excited optical luminescence study at the Zn K-edge

ZnO nanostructures have been synthesized by thermal evaporation on Si substrates. It is found that the morphologies of the nanostructures are governed by growth conditions such as temperature, carrier-gas flow rate, and the nature of the substrate (with and without a catalyst). We report X-ray excited optical luminescence from ZnO nanostructures of distinctly different morphologies in the energy and time domain using excitation photon energies across the Zn K-edge. X-ray excited optical luminescence (XEOL) and X-ray absorption near edge structure (XANES) study has clearly shown the morphology dependence of the ZnO optical properties. A correlation of luminescence with morphology, size, and crystallinity emerges.
Authors:
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Publication Date:
OSTI Identifier:
1005820
Resource Type:
Journal Article
Resource Relation:
Journal Name: Canadian Journal of Chemistry; Journal Volume: 87; Journal Issue: (9) ; 2009
Research Org:
Argonne National Laboratory (ANL)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ZINC OXIDES; SYNTHESIS; LUMINESCENCE; MORPHOLOGY; NANOSTRUCTURES