Study of Surface-Enhanced Raman Scattering of Rhodamine 6G from repeated dewetted gold thin film

Pal, A and Varma, MM (2024) Study of Surface-Enhanced Raman Scattering of Rhodamine 6G from repeated dewetted gold thin film. In: IEEE Applied Sensing Conference, APSCON 2024, 22 January 2024through 24 January 2024, Goa.

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Abstract

This study reports the fabrication of gold nanoislands by thermal dewetting of gold thin film deposited on a silicon wafer to study the SERS of Rhodamine 6G molecules at an ultra-low concentration. It provides a comparative study of single dewetting and repeated dewetting, showing that repeated dewetting provides ten times higher SERS enhancement than the other. Repeated dewetting reduces the gap between the particles and increases the number of plasmonic hotspots. We analyzed the SERS by using DI water and ethanol as the solvent for R6G, using a laser excitation of 532 nm. We also reported the single-molecule detection of the R6G molecule using our SERS substrate. This simple fabrication method of SERS substrate can be used in the future to detect analytes at a single-molecule regime. © 2024 IEEE.

Item Type:	Conference Paper
Publication:	APSCON 2024 - 2024 IEEE Applied Sensing Conference, Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Gold coatings; Gold deposits; Laser excitation; Molecules; Organic solvents; Plasmonics; Raman scattering; Silicon wafers; Substrates; Surface scattering; Thin films, De-wetting; Gold nanoparticle; Gold Nanoparticles; Plasmonics; Rhodamine 6G; SERS; Single molecule; Single-molecule SERS, Gold nanoparticles
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	28 Aug 2024 06:14
Last Modified:	28 Aug 2024 06:14
URI:	http://eprints.iisc.ac.in/id/eprint/84891

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