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Issue 13, 2013
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Templated silver nanocube arrays for single-molecule SERS detection

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Abstract

We describe the self-assembly of silver nanocubes (AgNC) into dense bowl-shaped arrays using a template made from polystyrene nanospheres (PSNS). Interestingly, we found that most AgNCs were arranged facet-to-facet. When used as substrates for surface-enhanced Raman scattering (SERS), we observed that the SERS hot spot positions were located at the corners of the cubes. This was confirmed using the formation of a self-assembled monolayer (SAM) of 1-dodecanethiol (DDT) covering the cubes' facet surface, whilst the pinholes in the DDT SAM at the corners were subsequently filled with 2-mercaptopyridine (MPy). Due to the high enhancement from the densely arranged AgNCs, single molecule detection was achieved from this SERS substrate and evidenced using the bi-analyte Raman technique.

Graphical abstract: Templated silver nanocube arrays for single-molecule SERS detection

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Supplementary files

Article information


Submitted
09 Oct 2012
Accepted
28 Jan 2013
First published
28 Jan 2013

RSC Adv., 2013,3, 4288-4293
Article type
Paper

Templated silver nanocube arrays for single-molecule SERS detection

C. Fang, D. Brodoceanu, T. Kraus and N. H. Voelcker, RSC Adv., 2013, 3, 4288
DOI: 10.1039/C3RA22457K

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