Journal
NANOSCALE
Volume 7, Issue 21, Pages 9405-9410Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr01654a
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Funding
- Swedish Foundation for Strategic Research [RMA11-0037]
- Swedish Research Council
- Swedish Defence Materiel Administration, FMV at FOI [E4884, E4878]
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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.
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