Electron microscopy of noble metal alloy nanoparticles prepared by sonochemical methods

Authors
Oshima, R Yamamoto, TA Mizukoshi, Y Nagata, Y Maeda, Y
Citation
R. Oshima et al., Electron microscopy of noble metal alloy nanoparticles prepared by sonochemical methods, NANOSTR MAT, 12(1-4), 1999, pp. 111-114
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
NANOSTRUCTURED MATERIALS
ISSN journal
09659773 → ACNP
Volume
12
Issue
1-4
Year of publication
1999
Part
A
Pages
111 - 114
Database
ISI
SICI code
0965-9773(199907)12:1-4<111:EMONMA>2.0.ZU;2-7
Abstract
Argon-saturated aqueous solutions of NaAuCl4 and PdCl2 or K2PtCl4 were redu ced simultaneously by ultrasound irradiation to prepare noble metal alloy n anoparticles. Droplets recovered from colloidal dispersions were placed on carbon-supported copper grids, and dried in a vacuum. They were examined by TEM, HRTEM, and nano-area energy dispersion X-ray spectroscopy(EDX). The A u-Pd nanoparticles exhibited monodispersive distribution (8 nm), and consis ted of a gold core and a palladium shell. Au-Pt alloy nanoparticles could n ot be produced from NaAuCl4 and K2PtCl4 aqueous solutions either by simulta neous or successive reduction. (C) 1999 Acta Metallurgica Inc.