Nanoparticle Superstructures Made by Polymerase Chain Reaction: Collective Interactions of Nanoparticles and a New Principle for Chiral Materials

被引：223

作者：

Chen, Wei ^{[1
,2
]}

Bian, Ai ^{[1
]}

Agarwal, Ashish ^{[2
]}

Liu, Liqiang ^{[1
]}

Shen, Hebai ^{[3
]}

Wang, Libing ^{[1
]}

Xu, Chuanlai ^{[1
]}

Kotov, Nicholas A. ^{[2
,4
,5
]}

机构：

[1] Jiangnan Univ, Sch Food Sci & Technol, Wuxi 214122, Peoples R China

[2] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

[3] Shanghai Normal Univ, Sch Life & Environm Sci, Shanghai 200234, Peoples R China

[4] Univ Michigan, Dept Mat Sci, Ann Arbor, MI 48109 USA

[5] Univ Michigan, Dept Biomed Engn, Ann Arbor, MI 48109 USA

来源：

NANO LETTERS | 2009年 / 9卷 / 05期

基金：

中国国家自然科学基金;

关键词：

CDS QUANTUM DOTS; GOLD NANOPARTICLES; NEGATIVE-INDEX; OPTICAL-ACTIVITY; THIN-FILMS; DNA; PCR; AMPLIFICATION; REFRACTION; CRYSTALLIZATION;

D O I：

10.1021/nl900726s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polymerase chain reaction (PCR) was realized on the surface of gold nanoparticles (NPs) as a tool for self-organization at nanoscale and as a step toward programmable production of sufficient quantities of functional metallic superstructures. The assembly is controlled by varying the density of the primer on the surface of gold NPs and the number of PCR cycles generating a mixture of dimers, trimers, tetramers, etc., with gradually increasing complexity. This process leads to strong chirality of the assemblies arising from the three-dimensional positioning of NPs in space which had never been observed before. A circular dichroism band of the superstructures coincides with the plasmon oscillations of the multi-NP systems of Au colloids. This new collective optical property of NPs embracing the diversity of shapes and diameters in the starting dispersions opens unique opportunities for the development of negative index materials.

引用

页码：2153 / 2159

页数：7