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Issue 21, 2015
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Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography

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Abstract

Nanoplasmonic substrates with optimized field-enhancement properties are a key component in the continued development of surface-enhanced Raman scattering (SERS) molecular analysis but are challenging to produce inexpensively in large scale. We used a facile and cost-effective bottom-up technique, colloidal hole-mask lithography, to produce macroscopic dimer-on-mirror gold nanostructures. The optimized structures exhibit excellent SERS performance, as exemplified by detection of 2.5 and 50 attograms of BPE, a common SERS probe, using Raman microscopy and a simple handheld device, respectively. The corresponding Raman enhancement factor is of the order 1011, which compares favourably to previously reported record performance values.

Graphical abstract: Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography

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Publication details

The article was received on 13 Mar 2015, accepted on 27 Apr 2015 and first published on 28 Apr 2015


Article type: Communication
DOI: 10.1039/C5NR01654A
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Nanoscale, 2015,7, 9405-9410
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    Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography

    A. Hakonen, M. Svedendahl, R. Ogier, Z. Yang, K. Lodewijks, R. Verre, T. Shegai, P. O. Andersson and M. Käll, Nanoscale, 2015, 7, 9405
    DOI: 10.1039/C5NR01654A

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