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Gold Bipyramid Nanoparticle Dimers

Authors :
Philippe Guyot-Sionnest
Edward W. Malachosky
Source :
The Journal of Physical Chemistry C. 118:6405-6412
Publication Year :
2014
Publisher :
American Chemical Society (ACS), 2014.

Abstract

An aqueous synthesis of gold bipyramid dimers is presented. The methodology, its selectivity, and the characterization of the resulting structures with optical dark-field and scanning electron microscopy are presented and discussed. In the bowtie orientation, the dimers exhibit a 20% red shift in their plasmon resonance as compared to the individual particles, with a weak dependence on the interparticle separation. From the analysis, it was found that the in situ absorption peaks that develop during the assembly can be assigned to specific dimer structures, which has not been shown previously. Last, the kinetics of the assembly are analyzed.

Details

ISSN :
19327455 and 19327447
Volume :
118
Database :
OpenAIRE
Journal :
The Journal of Physical Chemistry C
Accession number :
edsair.doi...........5d7e3f2276451320aadbea15b02a9351
Full Text :
https://doi.org/10.1021/jp412409u