| Autor: |
T.D. AbdelAziz, N.A. Elalaily, F.M. Ezz-Eldin |
| Jazyk: |
angličtina |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Journal of Radiation Research and Applied Sciences, Vol 8, Iss 1, Pp 84-90 (2015) |
| Druh dokumentu: |
article |
| ISSN: |
1687-8507 |
| DOI: |
10.1016/j.jrras.2014.11.003 |
| Popis: |
In the present radiolytic study, we report the formation of Cu+2 ions in a sol–gel SiO2 thin film via γ-irradiation. The optical and magnetic properties of Cu/SiO2 film are discussed in relation to the mechanism of the formation of Cu+2 ions through irradiation. The color of the treated Cu/SiO2 films swinging from faint green to dark blue as the concentration of Cu(NO3)2 solution was increased from 0.2 to 0.6 and then decreased at 1.2 mol/L. The absorption spectra of the samples revealed many identified broad absorption bands in both, UV (∼190–280 nm) and, in the visible region (∼360–530 and ∼600–740 nm) beside a shallow broad ones in near infrared (∼800–880 nm). Also, there are remarkable increases in the absorption intensities accompanying with red shift for the heat-treated samples soaked in 1.2 mol/L. In order to study the state of Cu2+, and confirm the influence of the matrix, by investigating their EPR and XRD spectroscopy, respectively. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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