A comparative study of heterostructured CuO/CuWO4 nanowires and thin films
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Date
2017
Authors
Polyakov, Boris
Kuzmin, Alexei
Vlassov, Sergei
Butanovs, Edgars
Zideluns, Janis
Butikova, Jelena
Kalendarev, Robert
Zubkins, Martins
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Abstract
A comparative study of heterostructured CuO/CuWO4 core/shell nanowires and double-layer thin films was performed through X-ray diffraction, confocal micro-Raman spectroscopy and electron (SEM and TEM) microscopies. The heterostructures were produced using a two-step process, starting from a deposition of amorphous WO3 layer on top of CuO nanowires and thin films by reactive DC magnetron sputtering and followed by annealing at 650 °C in air. The second step induced a solid-state reaction between CuO and WO3 oxides through a thermal diffusion process, revealed by SEM-EDX analysis. Morphology evolution of core/shell nanowires and double-layer thin films upon heating was studied by electron (SEM and TEM) microscopies. A formation of CuWO4 phase was confirmed by X-ray diffraction and confocal micro-Raman spectroscopy.
Description
Authors are grateful to Reinis Ignatans for XRD measurements.
Keywords
Research Subject Categories::NATURAL SCIENCES:Physics , A1. Characterization , A1. Crystal morphology , A1. Nanostructures , B1. Oxides , B1. Tungstates