resumo
Ag-doped and pure zinc oxide (ZnO) nano-plates were successfully synthesized via low cost wet precipitation method. The crystalline phases and the morphological features of the synthesized samples were assessed by X-ray diffraction (XRD) and scanning electron microscopy. These techniques coupled with Energy-dispersive X-ray spectroscopy (EDS) measurements confirmed the incorporation of Ag element into the ZnO matrix. The dielectric loss and ac conductivity were studied as a function of frequency and composition. A detailed analysis of the dielectric loss and ac conductivity as a function of composition were done in a wide frequency range at room temperature. In addition, the charge transport mechanism through the grain and grain boundary regions were investigated using impedance spectroscopy analysis. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
palavras-chave
SOL-GEL METHOD; OPTICAL-PROPERTIES; ZINC-OXIDE; FILMS; CONDUCTIVITY; FREQUENCY; VARISTORS; CERAMICS; FERRITES
categoria
Materials Science
autores
Zamiri, R; Singh, BK; Dutta, D; Reblo, A; Ferreira, JMF
nossos autores
Avito Rebelo
Estudante de doutoramento
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)
Reza Zamiri
Bolseiro de pós-Doutoramentoagradecimentos
The author Reza Zamiri and Budhendra Singh would like to express their personal thanks to FCT (Fundacaopara a Ciencia e a Tecnologia) for post-doctoral research Grants with reference numbers (SFRH/BPD/76185/2011) and SFRH/BPD/76184/2011, respectively.