Dutta, D. ; Ghosh, A. (2007) Relaxation dynamics of Ag4Te3O8 glass nanocomposites embedded with Ag2S nanoparticles The Journal of Chemical Physics, 127 (4). 044708_1-044708_7. ISSN 0021-9606
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Official URL: http://jcp.aip.org/resource/1/jcpsa6/v127/i4/p0447...
Related URL: http://dx.doi.org/10.1063/1.2756833
Abstract
Stable β-Ag2S nanocrystals were dispersed in the Ag4Te3O8 glass network. These β-Ag2S nanocrystals modified the tellurite network by rupturing the Te-O-Te linkages in the tellurite matrix. This structural modification was found to be different from that of the AgI doped silver tellurite glasses. The presence of β-Ag2S nanoparticles was confirmed from the transmission electron micrographs. The structural modification was observed in the Fourier transform infrared spectra of the composites. Electrical properties for these composites were investigated in the temperature range of 125-303 K and in the frequency range of 10 Hz-2 MHz and were compared with those of the AgI doped silver tellurite glass system to shed some light on the influence of Ag2S nanoparticles on the ionic conduction and relaxation in the silver tellurite nanocomposites. The ionic relaxation in this system was also investigated using the electrical modulus formalism. Formation of nanocrystal in this nanocomposite system left some signature on the frequency exponent, crossover frequency, and the relaxation frequency, which became clear when compared with those of the silver tellurite glasses.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Institute of Physics. |
Keywords: | Fourier Transform Spectra; Glass Structure; Infrared Spectra; Ionic Conductivity; Nanocomposites; Nanoparticles; Silver Compounds; Transmission Electron Microscopy |
ID Code: | 72823 |
Deposited On: | 29 Nov 2011 13:25 |
Last Modified: | 29 Nov 2011 13:25 |
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