Conductive Gold Nanoparticle Mirrors at Liquid/Liquid Interfaces

Gold nanoparticle (Au NP) mirrors, that 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 (FDTD) calculations, occurred for Au NP films consisting of 60 nm diameter NPs and approximate monolayer surface coverage. Scanning electrochemical microscopy (SECM) 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.


Published in:
ACS Nano, 7, 10, 9241–9248
Year:
2013
Publisher:
Washington, Amer Chemical Soc
ISSN:
1936-086X
Keywords:
Laboratories:




 Record created 2013-09-25, last modified 2018-03-17

Publisher's version:
Download fulltextPDF
Supporting Information:
Download fulltextPDF
TOC graphic:
Download fulltextGIF
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)