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.
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).
Writers: R.C. Gouveia and H. Kamimura and R. Munhoz and A.D. Rodrigues and E.R. Leite and A.J. Chiquito Keywords: Nanostructures; Semiconductors; Raman spectroscopy; Transport properties Abstract: Germanium nanowires have been synthesized by the well known vapor-liquid-solid growth mechanism […]
Tuning structural, optical, and gas sensing properties of ceria-based materials by rare-earth doping Abstract: In this study, we investigate the influence of rare-earth dopants on the structural, optical, gas sensing properties of Ce1-(3/4)xRExO2 (RE = […]
