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20 June 2024 Tunable plasmonic properties in metal nanohole arrays for SERS single-molecule detection
Maria Grazia Manera, Adriano Colombelli, Daniela Lospinoso, Roberto Rella
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Proceedings Volume PC13008, Biophotonics in Point-of-Care III; PC1300807 (2024) https://doi.org/10.1117/12.3016673
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Metal nano-hole arrays, modulating resonances intensity and spectral position, span visible to near-infrared ranges, unlocking sensing applications. Displacing electric fields toward the interface with air, facilitated by a high-index material (SiN) substrate, refines the sensitive region and improve enhancement. Efficient and reproducible fabrication protocols, such as the modified nanosphere lithography (NSL) method, have been developed by our group for the creation of highly ordered nano-hole arrays (NHAs) in thin gold films. These arrays feature diverse properties, including thickness, hole shape, diameter, and lateral periodic or quasi-periodic spacing. Interference and coupling between plasmonic modes of different natures present a route for enhancement for SERS applications. Integrating these nanostructures within a fiber-based microfluidic system offers an innovative solution for pesticide detection. This system, characterized by straightforward fabrication, cost-effectiveness, sensitivity, and specificity, emerges as a formidable contender for in-situ environmental monitoring, encapsulating cutting-edge research and innovation in pest control.
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Maria Grazia Manera, Adriano Colombelli, Daniela Lospinoso, and Roberto Rella "Tunable plasmonic properties in metal nanohole arrays for SERS single-molecule detection", Proc. SPIE PC13008, Biophotonics in Point-of-Care III, PC1300807 (20 June 2024); https://doi.org/10.1117/12.3016673
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KEYWORDS
Plasmonics
Metals
Surface enhanced Raman spectroscopy
Materials properties
Nanomaterials
Spectroscopy
Nanostructures
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