• Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we report on the time-dependent development of cupric oxide films by chemical modifica-tion of copper substrates submerged horizontally in a room temperature 75 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 1.39 eV for exposure times from 36 to 168 h. Ó 2014 Elsevier B.V. All rights reserved.
    Journal of Alloys and Compounds 12/2014; 617(C):542-546. · 2.73 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Title: Preparation of Cu 2 O nano-colloid and its application as selective colorimetric sensor for Ag + ion Authors: V. Andal, G. Buvaneswari PII: Please cite this article as: V. Andal, G. Buvaneswari, Preparation of Cu 2 O nano-colloid and its application as selective colorimetric sensor for Ag + ion, Sensors and Actuators B: Chemical (2010), doi:10.1016/j.snb.2011.01.025 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
    Sensors and Actuators B Chemical 07/2011; 155(2):653-658. · 3.84 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Available online xxx Keywords: Electrodeposition Cu 2 O selective absorbers Spectroscopy a b s t r a c t This paper reports on the thermal oxidation of electrodeposited copper microstructures from a 0.2 M H 2 SO 4 þ 0.4 M CuSO 4 aqueous solution on a copper substrate for selective solar thermal absorbers applications. A study of the morphological properties and crystalline structure of the deposited/annealed layer through SEM-EDS and powder XRD revealed the formation of self-assembled cubic Cu 2 O micro-structures. The copper oxide layer was optically examined by virtue of a spectrometer in the spectral Vis eNIR range. The surface roughness induced by the existence of the globular microstructure has been seen to enhance the absorptance of the material. Around two to three-fold enhancement of optical surface absorption is achieved in the wavelength range of 400e1000 nm versus an air-grown copper oxide.
    Renewable Energy 01/2015; · 3.36 Impact Factor

Full-text

Download
1 Download
Available from