Conductive gold nanoparticle mirrors at liquid/liquid interfaces

Ping Ping Fang; Shu Chen; Haiqiang Deng; Micheál D. Scanlon; Frédéric Gumy; Hye Jin Lee; Dmitry Momotenko; Véronique Amstutz; Fernando Cortés-Salazar; Carlos M. Pereira; Zhilin Yang; Hubert H. Girault

doi:10.1021/nn403879g

Conductive gold nanoparticle mirrors at liquid/liquid interfaces

Ping Ping Fang, Shu Chen, Haiqiang Deng, Micheál D. Scanlon, Frédéric Gumy, Hye Jin Lee, Dmitry Momotenko, Véronique Amstutz, Fernando Cortés-Salazar, Carlos M. Pereira, Zhilin Yang, Hubert H. Girault

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	9241-9248
Number of pages	8
Journal	ACS Nano
Volume	7
Issue number	10
DOIs	https://doi.org/10.1021/nn403879g
Publication status	Published - 22 Oct 2013
Externally published	Yes

Keywords

Au nanoparticle mirror
conductance
liquid/liquid interface
reflectance
scanning electrochemical microscopy
surface plasmon resonance

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10.1021/nn403879g

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title = "Conductive gold nanoparticle mirrors at liquid/liquid interfaces",

abstract = "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.",

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doi = "10.1021/nn403879g",

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AU - Fang, Ping Ping

AU - Chen, Shu

AU - Deng, Haiqiang

AU - Scanlon, Micheál D.

AU - Gumy, Frédéric

AU - Lee, Hye Jin

AU - Momotenko, Dmitry

AU - Amstutz, Véronique

AU - Cortés-Salazar, Fernando

AU - Pereira, Carlos M.

AU - Yang, Zhilin

AU - Girault, Hubert H.

PY - 2013/10/22

Y1 - 2013/10/22

N2 - 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.

AB - 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.

KW - Au nanoparticle mirror

KW - conductance

KW - liquid/liquid interface

KW - reflectance

KW - scanning electrochemical microscopy

KW - surface plasmon resonance

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JF - ACS Nano

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ER -

Conductive gold nanoparticle mirrors at liquid/liquid interfaces

Abstract

Keywords

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