Formation of Ag nanoparticles on metastable beta-Ag2WO4 microcrystals induced by electron irradiation

Chemical Physics Letters Volume: 644 Pages: 68-72 Published: 2016

16 de janeiro de 2016 CDMF Artigo 0

FE-SEM-micrographs-of-b-Ag2WO4 — FE-SEM micrographs of β-Ag2WO4, showing growth and reabsorption of Ag NPs, (a) before, and (b) after electron irradiation for 100 s. The Ag NPs ranged in sizefrom 12 to 16 nm. In (a) non Ag particles are indicated with X, and in (b) dashed line circles are Ag NPs with excessive growth (Scale bar is 200 nm).

Writers: Roman Alvarez Roca and Pablo S. Lemos and Juan Andrés and Elson Longo

Keywords: nanoparticles; metastable; microcrystals; electron irradiation

Abstract: In the present work, an easy precipitation method without presence of surfactants is applied to the synthesis of the hexagonal phase of metastable β-Ag₂WO₄ microcrystals at room temperature. In addition, we report for first time the in situ formation, growth, and subsequent reabsorption of Ag nanoparticles on the surface of this metastable phase, which was induced by electron beam irradiation under high vacuum.

Sobre CDMF 591 Artigos

O CDMF é um dos Centros de Pesquisa, Inovação e Difusão (CEPID) apoiados pela FAPESP. O Centro também recebe investimento do CNPq, a partir do Instituto Nacional de Ciência e Tecnologia dos Materiais em Nanotecnologia (INCTMN).