Enhanced Ordering in Gold Nanoparticles Self-Assembly through Excess Free Ligands

被引：59

作者：

Lau, Cindy Y. ^{[2
]}

Duan, Huigao ^{[1
]}

Wang, Fuke ^{[1
]}

He, Chao Bin ^{[1
]}

Low, Hong Yee ^{[1
]}

Yang, Joel K. W. ^{[1
]}

机构：

[1] Inst Mat Res & Engn, Singapore 117602, Singapore

[2] Princeton Univ, Princeton, NJ 08544 USA

来源：

LANGMUIR | 2011年 / 27卷 / 07期

基金：

美国国家科学基金会;

关键词：

METAL NANOCRYSTAL MEMORIES; SUPERLATTICES; MONOLAYER; SURFACE; FILMS; AU;

D O I：

10.1021/la104786z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-assembly of nanometer-sized particles is an elegant and economical approach to achieve dense patterns over large areas beyond the resolution and throughput capabilities of electron-beam lithography. In this paper, we present results of self-assembly of oleylamine-capped gold nanoparticles with 8.0 +/- 0.3 nm diameter into densely packed and well-ordered monolayers with center-to-center distance of similar to 11 nm. Self-assembly was done in a Langmuir-Blodgett trough and picked up onto Si substrates. The nanopartides undesirably assembled within micrometer-sized "droplets" that were organic in nature. However, within these droplets, we observed that the addition of the excess ligand, oleylamine, drastically enhanced the self-assembly of the nanoparticles into monolayers with near-perfect ordering. This approach has the potential use in templated self-assembly of nanopartides for rearranging poorly ordered assembly into a commensurate prepatterned substrate.

引用

页码：3355 / 3360

页数：6

共 35 条

[1] Preparation and electrical properties of cobalt-platinum nanoparticle monolayers deposited by the Langmuir-Blodgett technique [J].