Effect of metallic Ag growth on the electrical resistance of 3D flower-like Ag4V2O7 crystals

Autor(es)

de Oliveira, Regiane C. ; Zanetti, Sonia M. ; Assis, Marcelo ; Penha, Maya ; Mondego, Mayara ; Cilense, Mario ; Longo, Elson ; Cavalcante, Laecio S.

• Tipo de documento: Artigo Científico
• Fonte: Journal of the American Ceramic Society; v. 100, n. 6, p. 2358-2362, JUN 2017.
• Citações Web of Science: 1

Resumo

In this communication, we report for the first time the nucleation and growth of metallic Ag nanoparticles on the surface of 3D flower-like Ag4V2O7 crystals, induced by accelerated electron beam irradiation. The growth of metallic Ag on the surfaces of Ag4V2O7 crystals were studied by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDXS). According to TEM images and EDXS analyses, exposure to the electron beam induces a reduction process and the growth of metallic Ag nanoparticles on the surface of Ag4V2O7 crystals. Moreover, the inductively coupled plasma optical emission spectrometry measurements indicated an excess of Ag and V vacancies at Ag4V2O7 lattice. Finally, it was observed that the electrical resistance varies considerably with the exposure time to electron beam irradiation. (AU)

• Processo FAPESP: 13/26671-9 - Estudo teórico-experimental de semicondutores multifuncionais
• Beneficiário: Amanda Fernandes Gouveia
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs