Optical and magnetic properties of Cu/SiO2 composite films prepared via γ-irradiation route
| Autor: | F.M. Ezz-Eldin, T. D. Abd-elaziz, N. A. Elalaily |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Absorption spectroscopy XRD Near-infrared spectroscopy Analytical chemistry Cu (NO3)2 SiO2 gel film UV-visible law.invention Ion Heat-treatment law lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Irradiation EPR Absorption (chemistry) Thin film Electron paramagnetic resonance Spectroscopy γ-Irradiation |
| Zdroj: | Journal of Radiation Research and Applied Sciences, Vol 8, Iss 1, Pp 84-90 (2015) |
| ISSN: | 1687-8507 |
| 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: | OpenAIRE |
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