Journal
NANOTECHNOLOGY
Volume 25, Issue 41, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/25/41/415202
Keywords
plasmonics; silver nanoparticles; SERS substrates
Funding
- European Commission [228144, FP7-NMP-2010-SME/262782-2]
- Portuguese Science Foundation (FCT-MEC) [PEst-C/CTM/LA0025/2013-14, PEst-C/EQB/LA0006/2013, EXCL/CTM-NAN/0201/2012, PTDC/CTM-POL/1484/2012, EXPL/CTM-NAN/0754/2013, SFRH/BD/85587/2012]
- Junta de Andalucia [P10-FQM-06615, P07-FQM-02595]
- EU [264687]
- Fundação para a Ciência e a Tecnologia [PTDC/CTM-POL/1484/2012, EXPL/CTM-NAN/0754/2013, SFRH/BD/85587/2012] Funding Source: FCT
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This work reports on highly efficient surface enhanced Raman spectroscopy (SERS) constructed on low-cost, fully recyclable and highly reproducible cardboard plates, which are commonly used as disposable packaging material. The active optical component is based on plasmonic silver nanoparticle structures separated from the metal surface of the cardboard by a nanoscale dielectric gap. The SERS response of the silver (Ag) nanoparticles of various shapes and sizes were systematically investigated, and a Raman enhancement factor higher than 10(6) for rhodamine 6G detection was achieved. The spectral matching of the plasmonic resonance for maximum Raman enhancement with the optimal local electric field enhancement produced by 60 nm-sized Ag NPs predicted by the electromagnetic simulations reinforces the outstanding results achieved. Furthermore, the nanoplasmonic SERS substrate exhibited high reproducibility and stability. The SERS signals showed that the intensity variation was less than 5%, and the SERS performance could be maintained for up to at least 6 months.
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