Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8001006 | Journal of Alloys and Compounds | 2014 | 5 Pages |
Abstract
In this paper, we report on the time-dependent development of cupric oxide films by chemical modification of copper substrates submerged horizontally in a room temperature 75Â mmol/L ammonia solution at pH 11, over a period of nine days. Morphological and structural characterization of the oxide-substrate tandems were carried out by SEM-EDX and XRD, while the relative directional spectral absorptivity and reflectivity were determined by Vis-NIR spectrometry. The ageing process, controlling both the color and morphological structure of the predominately amorphous-CuO/Cu, has positively contributed to the enhancement of spectral absorptivity, while band gap values evolve from 1.29 to 1.39Â eV for exposure times from 36 to 168Â h.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Abdul Hai Alami, Anis Allagui, Hussain Alawadhi,