Spectroscopic evidence of a core-shell structure in the earlier formation stages of Au-Ag nanoparticles by pulsed laser ablation in water

被引：60

作者：

Compagnini, Giuseppe ^{[1
]}

Messina, Elena ^{[1
]}

Puglisi, Orazio ^{[1
]}

Cataliotti, Rosario Sergio ^{[1
]}

Nicolosi, Valeria ^{[2
]}

机构：

[1] Univ Catania, Dipartimento Sci Chim, I-95125 Catania, Italy

[2] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 457卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2008.04.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mixed Au-Ag nanoparticles were obtained by pulsed laser ablation of metallic targets, subsequently mixing and re-irradiating different volumes of each nano-colloid. The study of these colloids after different irradiation times, performed by spectral analysis in the plasmonic resonance ( PR) region, allows us to ascertain that solid solutions of Aginto Au nano-crystals are obtained after an initial formation of Au-core-Ag-shell nanoparticles. These findings are corroborated by fitting the PR spectra with a simulation model based on the Mie-Gans theory. X-ray photoelectron spectroscopy and transmission electron microscopy data support these results and their interpretation. (c) 2008 Elsevier B. V. All rights reserved.

引用

页码：386 / 390

页数：5

共 21 条

[1] Laser ablation synthesis of gold nanoparticles in organic solvents [J].