Synergy of shaped-induced enhanced Raman scattering to improve surface-enhanced Raman scattering signal in the thiram molecule detection.

Autor: Bär J; Universidade Estadual de Campinas, Instituto de Química, Laboratorio de Materiais Funcionais, Campinas, SP, Brazil., de Barros A; Universidade Estadual de Campinas, Instituto de Química, Laboratorio de Materiais Funcionais, Campinas, SP, Brazil., Shimizu FM; Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin, Campinas, SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Giuseppe Máximo Scolfaro 10000, Polo II de Alta Tecnologia, 13083-100 Campinas, SP, Brazil., Sigoli FA; Universidade Estadual de Campinas, Instituto de Química, Laboratorio de Materiais Funcionais, Campinas, SP, Brazil., Bufon CCB; Instituto Presbiteriano Mackenzie, 01302-907 São Paulo, SP, Brazil., Mazali IO; Universidade Estadual de Campinas, Instituto de Química, Laboratorio de Materiais Funcionais, Campinas, SP, Brazil. Electronic address: mazali@unicamp.br.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2024 Apr 05; Vol. 310, pp. 123907. Date of Electronic Publication: 2024 Jan 17.
DOI: 10.1016/j.saa.2024.123907
Abstrakt: Herein, we explore the combined effect of Shaped-Induced Enhanced Raman Scattering (SIERS) and Surface-Enhanced Raman Scattering (SERS) for detecting thiram molecules. We fabricated V-shaped microchannels on a silicon (100) substrate through a standard lithography and etching process. The analysis of SIERS@SERS was performed for Si-V substrates modified with AuNRs with different thiram concentrations, 10 -7 to 10 -10 mol/L. The spectra were collected for different regions of the Si-V substrates, i.e., in the inside, edge, between (flat top), and far from Si-V (coffee-ring AuNRs aggregation) to assess the performance of Si-V microchannels obtained. The IDMAP statistical projection reveals a higher silhouette coefficient of 0.91 for the inside of Si-V, indicating a more excellent spectral reproducibility with closer relative intensities. The device platform used in this study stands out as a robust option for commercial sensors, demonstrating exceptional sensitivity in detecting a diverse range of molecules, even at low concentrations.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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