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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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Supplementary files

Article information


Submitted
13 Mar 2015
Accepted
27 Apr 2015
First published
28 Apr 2015

This article is Open Access

Nanoscale, 2015,7, 9405-9410
Article type
Communication
Author version available

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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