Transition from core-shell to Janus chemical configuration for bimetallic nanoparticles

被引：151

作者：

Langlois, Cyril ^{[1
]}

Li, Z. L. ^{[2
]}

Yuan, Jun ^{[3
]}

Alloyeau, Damien ^{[1
]}

Nelayah, Jaysen ^{[1
]}

Bochicchio, Davide ^{[4
,5
]}

Ferrando, Riccardo ^{[4
,5
]}

Ricolleau, Christian ^{[1
]}

机构：

[1] Univ Paris 07, CNRS UMR 7162, Lab Mat & Phenomenes Quant, F-75205 Paris 13, France

[2] Univ Birmingham, Sch Phys & Astron, Nanoscale Phys Res Lab, Birmingham B15 2TT, W Midlands, England

[3] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[4] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[5] IMEM CNR, I-16146 Genoa, Italy

来源：

NANOSCALE | 2012年 / 4卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

ELECTRON-MICROSCOPY; AG; NANOALLOYS; CORE/SHELL; PARTICLES; CU(110); GROWTH; MORPHOLOGY; HYDROGEN; SURFACE;

D O I：

10.1039/c2nr11954d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In order to determine the possibilities to control the chemical configuration of bimetallic nanoparticles, we have considered CuAg nanoparticles synthesized by a physical route as a model in this study. The synthesis was made by pulsed laser deposition under ultra-high vacuum conditions, via a sequential deposition procedure. We show that the temperature of the substrate and the absolute quantity of Ag in a particle are the main parameters that drive the chemical configuration. To explain the transition from a core-shell configuration to a Janus configuration as a function of Ag quantity, we have conducted density-functional theory calculations and atomistic molecular dynamics simulations to investigate the stability of this system. The results are presented together with the experimental observations.

引用

页码：3381 / 3388

页数：8

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