Conductive Gold Nanoparticle Mirrors at Liquid/Liquid Interfaces

被引：124

作者：

Fang, Ping-Ping ^{[1
]}

Chen, Shu ^{[2
]}

Deng, Haiqiang ^{[1
]}

Scanlon, Micheal D. ^{[1
]}

Gumy, Frederic ^{[1
]}

Lee, Hye Jin ^{[3
,4
]}

Momotenko, Dmitry ^{[1
]}

Amstutz, Veronique ^{[1
]}

Cortes-Salazar, Fernando ^{[1
]}

Pereira, Carlos M. ^{[5
]}

Yang, Zhilin ^{[2
]}

Girault, Hubert H. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Electrochim Phys & Analyt, Stn 6, CH-1015 Lausanne, Switzerland

[2] Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China

[3] Kyungpook Natl Univ, Dept Chem, Taegu 702701, South Korea

[4] Kyungpook Natl Univ, Green Nano Mat Res Ctr, Taegu 702701, South Korea

[5] Univ Porto, Fac Ciencias, Dept Quim & Bioquim, Ctr Invest Quim UP, P-4169007 Oporto, Portugal

来源：

ACS NANO | 2013年 / 7卷 / 10期

关键词：

surface plasmon resonance; Au nanoparticle mirror; liquid/liquid interface; reflectance; conductance; scanning electrochemical microscopy; SCANNING ELECTROCHEMICAL MICROSCOPY; METAL NANOPARTICLES; LIQUID; FILMS; SURFACTANT; SECM;

D O I：

10.1021/nn403879g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Gold nanoparticle (Au NP) mirrors, which exhibit both high reflectance and electrical conductance, were self-assembled at a [heptane + 1,2-dichloroethane]/water liquid/liquid interface. The highest reflectance, as observed experimentally and confirmed by finite difference time domain calculations, occurred for Au NP films consisting of 60 nm diameter NPs and approximate monolayer surface coverage. Scanning electrochemical microscopy approach curves over the interfacial metallic NP films revealed a transition from an insulating to a conducting electrical material on reaching a surface coverage at least equivalent to the formation of a single monolayer. Reflectance and conductance transitions were Interpreted as critical junctures corresponding to a surface coverage that exceeded the percolation threshold of the Au NP films at the [heptane + 1,2-dichloroethane]/water interface.

引用

页码：9241 / 9248

页数：8

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