Journal article
Surface-enhanced Raman scattering (SERS)-based volatile organic compounds (VOCs) detection using plasmonic bimetallic nanogap substrate
In this paper, we present surface-enhanced Raman scattering (SERS)-based volatile organic compounds (VOCs) detection with bimetallic nanogap structure substrate. Deep UV photolithography at the wavelength of 250 nm is used to pattern circular shape nanostructures. The nanogap between adjacent circular patterns is 30 +/- 5 nm.
Silver (30 nm) and gold (15 nm) plasmonic active layers are deposited on the nanostructures subsequently. SERS measurements on different concentrations of acetone vapor ranged from 0.7, 1.5, 3.5, 10.3, 24.5 % and control have been performed with the substrate. The measurement results are found reproducible, and the detection limit is found to be 9.5 pg (acetone molecule).
The detection sensitivity is 28.7 % higher than that of the recent reported leaning silicon nanopillar substrate. With further system miniaturization, the sensing technique can work as a portable SERS-based VOCs detection platform for point-of-care breath analysis, homeland security, chemical sensing and environmental monitoring.
Language: | English |
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Publisher: | Springer Berlin Heidelberg |
Year: | 2014 |
Pages: | 687-692 |
Journal subtitle: | Materials Science and Processing |
ISSN: | 14320630 and 09478396 |
Types: | Journal article |
DOI: | 10.1007/s00339-014-8723-6 |
Acetone Molecule Acetone Vapor Breath Analysis Characterization and Evaluation of Materials Condensed Matter Physics Homeland Security Nanotechnology Operating Procedures, Materials Treatment Optical and Electronic Materials Physics Physics and Astronomy Surfaces and Interfaces, Thin Films VOCs