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Conductive gold nanoparticle mirrors at liquid/liquid interfaces

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posted on 2020-01-10, 20:44 authored by Peng-Peng 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
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.

History

Publication

ACS Nano;7 (10), pp. 9241-9248

Publisher

American Chemical Society

Note

peer-reviewed

Other Funding information

Chinese Scholarship Council, Swiss National Science Foundation

Rights

© 2013 ACS This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/nn403879g

Language

English

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