Templated silver nanocube arrays for single-molecule SERS detection

Cheng Fang; Daniel Brodoceanu; Tobias Kraus; Nicholas Voelcker

doi:10.1039/c3ra22457k

Templated silver nanocube arrays for single-molecule SERS detection

Cheng Fang, Daniel Brodoceanu, Tobias Kraus, Nicholas Voelcker

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

23 Citations (Scopus)

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.

Original language	English
Pages (from-to)	4288-4293
Number of pages	6
Journal	RSC Advances
Volume	3
Issue number	13
DOIs	https://doi.org/10.1039/c3ra22457k
Publication status	Published - 7 Apr 2013

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AU - Brodoceanu, Daniel

AU - Kraus, Tobias

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Templated silver nanocube arrays for single-molecule SERS detection

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