Detection of organic dyes by surface-enhanced Raman spectroscopy using plasmonic NiAg nanocavity films.
Colloidal litography
FDTD
PCA analysis
SERS
Journal
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
ISSN: 1873-3557
Titre abrégé: Spectrochim Acta A Mol Biomol Spectrosc
Pays: England
ID NLM: 9602533
Informations de publication
Date de publication:
15 Mar 2021
15 Mar 2021
Historique:
received:
31
08
2020
revised:
24
11
2020
accepted:
05
12
2020
pubmed:
30
12
2020
medline:
30
12
2020
entrez:
29
12
2020
Statut:
ppublish
Résumé
This work presents the NiAg nanocavity film for the detection of organic dyes by surface-enhanced Raman spectroscopy (SERS). Nanocavity films were prepared by colloidal lithography using 518-nm polystyrene spheres combined with the electrochemical deposition of Ni supporting layer and Ag nanoparticles homogeneous SERS-active layer. The theoretical study was modelled by finite-difference time-domain (FDTD) simulation of electromagnetic field enhancement near the nanostructured surface and experimentally proven by SERS measurement of selected organic dyes (rhodamine 6G, crystal violet, methylene blue, and malachite green oxalate) in micromolar concentration. Furthermore, the concentration dependence was investigated to prove the suitability of NiAg nanocavity films to detect ultra-low concentrations of samples. The detection limit was 1.3 × 10
Identifiants
pubmed: 33373865
pii: S1386-1425(20)31301-9
doi: 10.1016/j.saa.2020.119322
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
119322Informations de copyright
Copyright © 2020 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
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.