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Versatile SERS sensing based on black silicon

journal contribution
posted on 2023-05-18, 09:25 authored by Seniutinas, G, Gervinskas, G, Verma, R, Gupta, BD, Lapierre, F, Stoddart, PR, Clark, F, McArthur, SL, Juodkazis, S
Black Si (b-Si) with gold or silver metal coating has been shown to be an extremely effective substrate for surface-enhanced Raman scattering (SERS). Here, we demonstrate that it is also a highly versatile SERS platform, as it supports a wide range of surface functionalizations. In particular, we report the use of a molecularly imprinted polymer (MIP) coating and a hydrophobic coating on b-Si to establish two different sensing modalities. First, using a MIP layer on Au-coated b-Si, we show selective sensing of two closely related varieties of tetracycline. Second, a hydrophobic coating was used to concentrate the analyte adsorbed on gold colloidal nanoparticles, thus increasing the sensitivity of the measurement by an order of magnitude. In this experiment, Au nanoparticles and analyte were mixed just before SERS measurements and were concentrated by drop-drying on the super-hydrophobic b-Si. These approaches are promising for SERS measurements that are sensitive to the aging of bare plasmonic metal-coated substrates.

History

Publication title

Optics Express

Volume

23

Issue

5

Pagination

6763-6772

ISSN

1094-4087

Department/School

School of Natural Sciences

Publisher

Optical Soc Amer

Place of publication

2010 Massachusetts Ave Nw, Washington, USA, Dc, 20036

Rights statement

Copyright 2015 Optical Society of America

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  • Restricted

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