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Deposition of Cobalt Doped Zinc Oxide Thin Film Nano-Composites Via Pulsed Electron Beam Ablation

Published online by Cambridge University Press:  19 January 2016

Asghar Ali ,
Patrick Morrow ,
Redhouane Henda  and
Ragnar Fagerberg
Asghar Ali*
Affiliation:
Bharti School of Engineering, Laurentian University, Sudbury, ON. Canada
Patrick Morrow
Affiliation:
Department of Physics, University of Guelph ON. Canada
Redhouane Henda
Affiliation:
Bharti School of Engineering, Laurentian University, Sudbury, ON. Canada
Ragnar Fagerberg
Affiliation:
SINTEF Materials and Chemistry, department of materials and nano technology, Trondheim, Norway
*
*(Email: aali2@laurentian.ca)
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Abstract

This study reports on the preparation of cobalt doped zinc oxide (Co:ZnO) films via pulsed electron beam ablation (PEBA) from a single target containing 20 w% Co on sapphire (0001) and silicon (100) substrates. The films have been deposited at various temperatures (350оC, 400оC, 450оC) and pulse frequencies (2 Hz, 4 Hz), under a background argon (Ar) pressure of about 3 mtorr, and an accelerating voltage of 14 kV. The surface morphology has been examined by atomic force microscopy (AFM) and scanning electron microscopy (SEM). According to SEM analysis, the films consist of nano-globules whose size is in the range of 80-178 nm. Energy dispersive x-ray spectroscopy (EDX) reveals that deposition is congruent and the prepared films contain ∼20±5 w% cobalt. It has been found that the nano-globules in the deposited films are cobalt-rich zones containing ∼70 w% Co. From x-ray photoelectron spectroscopy (XPS) analysis, Co 2p3/2 peaks indicate that the deposited films contain CoO (binding energy = 780.5 eV) as well as metallic Co (binding energy = 778.1-778.5 eV). X-ray diffraction (XRD) analysis supports the presence of metallic Co hcp phase (2ϴ = 44.47° and 47.43°) in the films.

Keywords

ablationthin filmcatalytic
Type
Articles
Information
MRS Advances , Volume 1 , Issue 6: Energy and Sustainability , 2016 , pp. 433 - 439
Copyright
Copyright © Materials Research Society 2016 

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