A two-fold SPR-SERS sensor utilizing gold nanoparticles and graphene thin membrane as a spacer in a 3D composite structure.

Autor: Nasr N; School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China; NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi'an 710072, China., Shafi M; Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China., Zhao T; School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China; NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: ztk@nwpu.edu.cn., Ali R; Faculty of Materials Science and Engineering, Kunming University of Science and Technology, 650093 Kunming, China., Ahmad I; NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi'an 710072, China., Khan M; School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, China; NPU-NCP Joint International Research Center on Advanced Nanomaterials and Defects Engineering, Northwestern Polytechnical University, Xi'an 710072, China. Electronic address: mkhan@nwpu.edu.cn., Deifalla A; Structural Engineering and Construction Management Department, Future University in Egypt, 11835, Egypt., Ragab AE; Department of Industrial Engineering, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia., Zahid Ansari M; School of Materials Science and Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea. Electronic address: zahid.smr@yu.ac.kr.
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2024 Jan 05; Vol. 304, pp. 123331. Date of Electronic Publication: 2023 Sep 01.
DOI: 10.1016/j.saa.2023.123331
Abstrakt: Localized surface plasmonic resonance (LSPR) biosensing using optical fibers has gained popularity due to its label-free approach and high sensitivity to changes in the nanoparticle surface's local index of refraction. However, improving sensitivity remains a challenge. In this study, a two-step approach was employed to fabricate a composite structure using gold nanoparticles and monolayer graphene (Gr-AuNPs). The combination of AuNPs and graphene membrane demonstrated high potential for Surface-enhanced Raman scattering (SERS) and surface plasmonic resonance (SPR) fiber sensors. The Gr-AuNPs sensor successfully detected R6G molecules with a low detection limit of 10 -12 M, indicating promising SERS activity. Numerical simulations confirmed that the graphene generated densely hot spots in the nanogap region between plasmonic layers. It's interesting that the proposed SPR-SERS Sensor can detect both glucose and thiram. This demonstrates the sensors practicality and can help with a basic environmental need to find leftover pesticides in the soil. The combination of SPR-SERS dual-mode detection provides more options for detecting and verifying data, increasing the precision and repeatability of experiments.
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 © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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