Fabrication of Cu2O Nanostructured Thin Film by Anodizing

Voon, Chun Hong and Lim, Bee Ying and Gopinath, Subash Chandra Bose and Al-Douri, Yarub and Foo, Kai Long and Md Arshad, Mohd Khairuddin and Ten, Seng Teik and Ruslinda, A. Rahim and Hashim, Uda and Tony, Voo Chung Sung (2018) Fabrication of Cu2O Nanostructured Thin Film by Anodizing. Materials Science-Poland, 36 (2). pp. 209-216. ISSN 2083-1331, DOI https://doi.org/10.1515/msp-2018-0035.

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Official URL: https://doi.org/10.1515/msp-2018-0035


Cuprous oxide, a narrow bandgap p-type semiconductor, has been known as a potential material for applications in supercapacitors, hydrogen production, sensors, and energy conversion due to its properties such as non-toxicity, easy availability, cost effectiveness, high absorption coefficient in the visible region and large minority carriers diffusion length. In this study, Cu2O nanostructured thin film was fabricated by anodizing of Cu plates in ethylene glycol containing 0.15 M KOH, 0.1 M NH4F and 3 wt.% deionized water. The effects of anodizing voltage and temperature of electrolyte were investigated and reported. It was found that nanoporous Cu2O thin film was formed when anodizing voltages of 50 V and 70 V were used while a dense Cu2O thin film was formed due to the aggregation of smaller nanoparticles when 30 V anodizing voltage was used. Nanoplatelets thin film was formed when the temperature of electrolyte was reduced to 15 °C and 5 °C. X-ray diffraction confirmed the presence of Cu2O phase in thin film formed during anodizing of Cu plates, regardless of the anodizing voltage and temperature of electrolyte. Photoluminescence spectroscopy showed the presence of Cu2O peak at 630 nm corresponding to band gap of 1.97 eV. A mechanism of the formation of Cu2O thin film was proposed. This study reported the ease of tailoring Cu2O nanostructures of different morphologies using anodizing that may help widen the applications of this material.

Item Type: Article
Funders: Department of Higher Education, Ministry of Higher Education, Malaysia [FRGS 9003-00441]
Uncontrolled Keywords: Anodizing; Cuprous oxide; Nanoplatelets; Nanopores; Thin film
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 Feb 2019 03:42
Last Modified: 21 Feb 2019 03:42
URI: http://eprints.um.edu.my/id/eprint/20420

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