CuO nanostructured thin films synthesised by chemical bath deposition on seed layers deposited by successive ionic layer adsorption and reaction and chemical spray pyrolysis techniques
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Publication Details
Author list: Muiva CM, Maabong K, Moditswe C
Publisher: Elsevier
Place: LAUSANNE
Publication year: 2016
Journal: Thin Solid Films (0040-6090)
Journal acronym: THIN SOLID FILMS
Volume number: 616
Start page: 48
End page: 54
Number of pages: 7
ISSN: 0040-6090
eISSN: 1879-2731
Languages: English-Great Britain (EN-GB)
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Abstract
One dimensional (1-D) CuO nanostructures have been synthesised by a simple, low cost and facile chemical bath deposition (CBD) method on seed layers deposited by successive ionic layer adsorption and reaction (SILAR) and chemical spray pyrolysis (CSP) techniques. During the CBD process, ammonia solution and ethylene glycol were used as complexing and surface assisting agents respectively. The overall images of the nanostructures resemble some reed-like shrubs and dandelions growing on a lawn of grass-like nanostructures. All the X-ray diffraction peaks observed were indexed to pure monoclinic phase of CuO. The two main diffraction peaks located at around 2 theta equals to 35.5 degrees and 38.6 degrees corresponds to ((1) over bar 11) and (111) planes of monoclinic CuO respectively. The presence of characteristic A(g) and two B-g primary Raman active modes in the Raman spectra confirmed formation of CuO. The broadening and shift in Raman peaks in SILAR/CBD films relative to the CSP/CBD film may be attributed to strain in the lattice. Optical transmission spectra revealed that the samples were mainly absorbing in the visible and UV spectral regions with a blue shifted optical band gap. (C) 2016 Elsevier B.V. All rights reserved.
Keywords
Chemical bath deposition, Copper oxide, Nanostructures, Optical properties, Successive ionic layer adsorption and reaction
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