From Ag Nanoprisms to Triangular AuAg Nanoboxes

被引：90

作者：

Aherne, Damian ^{[1
,2
]}

Gara, Matthew ^{[2
]}

Kelly, John M. ^{[2
]}

Gun'ko, Yurii K. ^{[1
,2
]}

机构：

[1] Trinity Coll Dublin, CRANN, Dublin 2, Ireland

[2] Trinity Coll Dublin, Sch Chem, Dublin 2, Ireland

来源：

ADVANCED FUNCTIONAL MATERIALS | 2010年 / 20卷 / 08期

基金：

爱尔兰科学基金会;

关键词：

OPTICAL-PROPERTIES; METAL NANOPARTICLES; SILVER NANOPARTICLES; REPLACEMENT REACTION; SURFACE-PLASMONS; HOLLOW INTERIORS; GOLD; NANOSTRUCTURES; NANOCAGES; SHAPE;

D O I：

10.1002/adfm.200902030

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In recent years, galvanic replacement reactions have been successfully employed to produce hollow bimetallic nanostructures of a range of shapes, yet to date there has been no example of the formation of hollow triangular AuAg nanostructures from a Ag nanoprism template. In this manuscript the first example of the synthesis of enclosed triangular AuAg nanostructures (triangular nanoboxes) via galvanic replacement reactions from Ag nanoprisms is reported. These triangular nanoboxes are studied by TEM and HAADF-STEM imaging to elucidate their structure. These studies show that the nanostructures are hollow do not consist of a Ag core surrounded by a Au shell. Discrete dipole approximation calculations for the extinction spectra are carried out and provide additional evidence that the nanostructures are hollow. These new triangular nanoboxes are very attractive candidates for encapsulation and transport of materials of interest such as drugs, radioisotopes, or magnetic materials:

引用

页码：1329 / 1338

页数：10

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