Improve optical properties by modifying Ag nanoparticles on a razor clam SERS substrate

Irregular substrates are inappropriate for enhancing surface enhanced Raman scattering (SERS) due to their poor performances in terms of uniformity, enhancement performance, and polarization characteristics. However, in this work, we purposely employed a natural biological razor clam material with m...

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Bibliographic Details
Published in:Optics express 2021-02, Vol.29 (4), p.5152-5165
Main Authors: Guo, Liting, Cao, Hongwen, Cao, Lipeng, Li, Na, Zhang, Anqi, Shang, Zubin, Jiao, Tifeng, Liu, H L, Wang, Mingli
Format: Article
Language:English
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Summary:Irregular substrates are inappropriate for enhancing surface enhanced Raman scattering (SERS) due to their poor performances in terms of uniformity, enhancement performance, and polarization characteristics. However, in this work, we purposely employed a natural biological razor clam material with messy and irregular structures to improve the SERS. The rough surface was achieved by magnetron sputtering Ag nanoislands on the prism layer of the razor clams, and the Ag nanoparticles were treated using the method of oil-water interface self-assembly to form relatively uniform structures. Compared to the substrate without Ag nanoparticles, the presented substrate has better reproducibility, polarization-independence, and higher SERS intensity, and the detect limitation of R6G can be decreased from 10 M to 10 M. The ultrasensitive detection of thiram gives our structures potential for high sensitivity biosensors.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.418551