Reusable SERS substrate based on interconnected metal network structure

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Authors

Neha Sardana¹ , Heena Sammi¹ , Rajesh. V Nair¹

1. Indian Institute of Technology, Ropar

Conference / event

International Conference of the Union of Materials Research Societies in Asia, December 2022 (Jodhpur, India)

Poster summary

In the present work, the fabrication of a facile, cost-effective, uniform, and reusable platform for the detection of analytes using surface-enhanced Raman scattering is discussed. An interconnected metal network structure made using gold (generally named as Nanoporous Gold) is fabricated via a time-varying chemical dealloying method. Using rhodamine 6G as a Raman reporter molecule, the surface-enhanced Raman scattering effectiveness of the dealloyed samples is studied. The etched samples show the highest enhancement induced by the large number of nano-ligaments and nano-gaps between the adjacent ligaments. The proposed substrates exhibit a ten-fold SERS enhancement with an excellent uniformity over the sample surface with relative standard deviation value of less than ~20%. Moreover, through an ethanol wash, the nanoporous gold substrate can be easily reused at least four times with a reproducible SERS signal with the same SERS enhancement.

Keywords

Nanoporous gold, Surface-enhanced Raman scattering, Dealloying, Rhodamine 6G, Sensing

Research areas

Nanoengineering, Physics, Environmental Sciences, Chemistry, Material Sciences

References

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3. Jinglin Huang et al., DOI: 10.1039/c6ra28591k, RSC Advances, 7, 2017 ,15747
4. Yanpeng Xue et al., DOI:10.1016/j.cplett.2018.08.044 R, Chemical Physics Letters, 709, 2018, 46–51
5. Wei Li et al., DOI:10.3390/nano9020251, Nanomaterials, 9, 2019, 251
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Funding

1. DST- science and engineering research board (SERB) (No. ECR/2016/000150)
2. Swarnajayanti Fellowship (No. DST/SJF/PSA-01/2019-20)

Supplemental files

No data provided

Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license

Copyright © 2023 Sardana et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.