Journal
ANALYTICAL CHEMISTRY
Volume 85, Issue 3, Pages 1342-1349Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac301028w
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Funding
- National Science Foundation (NSF)
- Environmental Protection Agency (EPA) under NSF Cooperative Agreement [EF-0830093]
- Center for the Environmental Implications of NanoTechnology (CEINT)
- NSF [CBET-1133746]
- ICTAS
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1133746] Funding Source: National Science Foundation
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A honeycomb-shaped gold substrate was developed for surface-enhanced Raman imaging (SERI). The honeycombs are composed of clusters of 50-70 nm gold nanoparticles and exhibit high Raman enhancement efficiency An average surface enhancement factor (ASEF) of 1.7 X 10(6) was estimated for a monolayer of L-cysteine molecules adsorbed to gold via a thiol linkage. The presence of a linear relationship in the low concentration region was observed in SERI detection of malachite green isothiocyanate (MGITC). These results together with the high reproducibility and simple and cost-effective fabrication of this substrate suggest that it has utility for applications of surface-enhanced Raman scattering (SERS) in quantitative diagnoses and analyte detection.
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