Issue 16, 2022, Issue in Progress

Large-area and low-cost SERS substrates based on a gold-coated nanostructured surface fabricated on a wafer-scale

Abstract

This paper demonstrates a method to fabricate plasmonic nanostructures over a large area that can be implemented as SERS substrates. The proposed method comprises batch processes such as spin coating, reactive ion etching, and thin metal deposition. These processes can be performed on large wafers, resulting in large numbers of SERS substrates in a single run. The effects of different process parameters were studied to optimize the performance of the SERS substrates. The study of sensitivity on the optimized SERS substrates was conducted using the SERS-active molecule pMBA. The SERS substrates thus fabricated were able to detect molecule concentrations as low as 100 nM. The SERS substrates were also evaluated for uniformity across the sample and for sample-to-sample reproducibility. Finally, the SERS substrates were applied to demonstrate label-free detection of organophosphorous pesticides – paraoxon ethyl and paraoxon methyl.

Graphical abstract: Large-area and low-cost SERS substrates based on a gold-coated nanostructured surface fabricated on a wafer-scale

Supplementary files

Article information

Article type
Paper
Submitted
19 Jan 2022
Accepted
02 Mar 2022
First published
28 Mar 2022
This article is Open Access
Creative Commons BY license

RSC Adv., 2022,12, 9645-9652

Large-area and low-cost SERS substrates based on a gold-coated nanostructured surface fabricated on a wafer-scale

A. Das, N. Gupta, A. K. Agrawal and A. Dhawan, RSC Adv., 2022, 12, 9645 DOI: 10.1039/D2RA00407K

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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