9 March 2021 Au@Ag nanorods for analysis of dyes by SERS spectroscopy
Anna Matsukovich, Liudmila Trotsiuk, Olga Kulakovich, Elena Shabunya–Klyachkovskaya, Irada Mamedova
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Abstract

We report on surface-enhanced Raman scattering (SERS) activity of bimetallic core-shell Au@Ag nanorods. These nanostructures feature four plasmon maxima in the UV-visible range. Their application for SERS analysis enables matching individual optical properties of organic analytes using the optimal excitation wavelength resonant both for plasmon nanostructures and analytes. It promotes higher sensitivity of surface-enhanced resonance Raman scattering (SERRS) of specific analytes. The intensity of SERRS spectrum is higher up to 2 orders of magnitude for alizarin and up to 4 times for malachite green as compared to the corresponding SERS spectra. Thus Au@Ag nanorods can be used as a single SERRS substrate for sensitive analysis of a number of dyes.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2021/$28.00 © 2021 SPIE
Anna Matsukovich, Liudmila Trotsiuk, Olga Kulakovich, Elena Shabunya–Klyachkovskaya, and Irada Mamedova "Au@Ag nanorods for analysis of dyes by SERS spectroscopy," Journal of Nanophotonics 15(1), 016010 (9 March 2021). https://doi.org/10.1117/1.JNP.15.016010
Received: 13 April 2020; Accepted: 13 January 2021; Published: 9 March 2021
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KEYWORDS
Surface enhanced Raman spectroscopy

Gold

Plasmons

Nanorods

Silver

Absorption

Magnesium

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