Templated silver nanocube arrays for single-molecule SERS detection

Cheng Fang, Daniel Brodoceanu, Tobias Kraus, Nicholas Voelcker

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    20 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 languageEnglish
    Pages (from-to)4288-4293
    Number of pages6
    JournalRSC Advances
    Volume3
    Issue number13
    DOIs
    Publication statusPublished - 2013

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    Fang, C., Brodoceanu, D., Kraus, T., & Voelcker, N. (2013). Templated silver nanocube arrays for single-molecule SERS detection. RSC Advances, 3(13), 4288-4293. https://doi.org/10.1039/c3ra22457k