Enhancement of the conductivity and dielectric properties of PVA/Ag nanocomposite films using γ irradiation
| Autor: | Wahib M. Attia, Ahmed Gamal El-Shamy, Kamal M. Abd El Kader |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Organic electronics Nanocomposite Materials science business.industry Analytical chemistry 02 engineering and technology Dielectric Polymer Conductivity 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Dielectric spectroscopy chemistry 0103 physical sciences Optoelectronics General Materials Science Dielectric loss Irradiation 0210 nano-technology business |
| Zdroj: | Materials Chemistry and Physics. 191:225-229 |
| ISSN: | 0254-0584 |
| Popis: | Polymer based composites with tunable dielectric properties have many applications in organic electronics. This manuscript reports the influence of gamma irradiation on the electrical and dielectric properties of silver/polymer composite (Ag/PVA) films with thickness 0.18 mm. The films were prepared by the in-situ chemical reduction and later irradiated with gamma (γ) radiation doses (25, 50, 75, 100, 125 KGy). The content of Ag (0.4 wt %) in the PVA films were determined by the atomic absorption spectroscopy (AA). The films were characterized by the dielectric spectroscopy and Current-Voltage (I V) measurements. The dielectric constant ( e ′ ) value decreased with the increasing gamma irradiation doses. The conductivity films and dielectric loss increased with the increasing gamma irradiation doses. The optimum conductivity: σ = 4.9 × 10−8 S m−1 was found at gamma radiation dose of 125 KGy. The Poole-Frenkel emission is the prevailing transport mechanism for all the samples. |
| Databáze: | OpenAIRE |
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