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Dimer-on-mirror SERS substrates with attogram sensitivity fabricated by colloidal lithography.
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2015 (English)In: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 7, no 21Article in journal (Refereed) Published
Abstract [en]

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 10(11), which compares favourably to previously reported record performance values.

Place, publisher, year, edition, pages
2015. Vol. 7, no 21
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Atom and Molecular Physics and Optics Nano Technology
Research subject
Physics
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URN: urn:nbn:se:kth:diva-197577DOI: 10.1039/c5nr01654aPubMedID: 25952612OAI: oai:DiVA.org:kth-197577DiVA, id: diva2:1165981
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QC 20171214

Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2017-12-14Bibliographically approved

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