Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms.
3D template
Au nanoparticles
SERS
Silicon nanowires
surface functionalization
Journal
International journal of molecular sciences
ISSN: 1422-0067
Titre abrégé: Int J Mol Sci
Pays: Switzerland
ID NLM: 101092791
Informations de publication
Date de publication:
24 Nov 2023
24 Nov 2023
Historique:
received:
12
09
2023
revised:
15
11
2023
accepted:
21
11
2023
medline:
9
12
2023
pubmed:
9
12
2023
entrez:
9
12
2023
Statut:
epublish
Résumé
The search for improved transducers to fabricate better-performing (bio)sensors is a challenging but rewarding endeavor aiming to better diagnose and treat diseases. In this paper, we report on the decoration of a dense vertical array of ultrathin silicon nanowires (Si NWs), produced by metal-assisted chemical etching, with 20 nm gold nanoparticles (Au NPs) for surface-enhanced Raman scattering (SERS) applications. To optimize the production of a uniform 3D SERS active platform, we tested different Si NW surface functionalizations with various alkoxysilanes before Au decoration. Scanning electron microscopy investigations confirm that Au NPs decorate both bare and (3-glycidiloxypropyl)trimethoxysilane (GPTMS)-modified Si NWs with a high surface coverage uniformity. The SERS response of the decorated NWs was probed using a model dye system (methylene blue; MB) at 633 and 785 nm excitation wavelengths. The GPTMS-modified NWs present the highest enhancements of 2.9 and 2.6 for the 450 cm
Identifiants
pubmed: 38069007
pii: ijms242316685
doi: 10.3390/ijms242316685
pmc: PMC10706837
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Italian Project PNNR "I-PHOQS-Integrated Infrastructure Initiative in Photonic and Quantum Science"
ID : CUPB53C22001750006
Organisme : Italian Project PNNR "Sicilian MicronanoTech Research And Innovation Center" (SAMO-THRACE)
ID : ECS00000022, CUP B63C22000620005
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