Sensing Platform for �-Electron-Rich Analytes

Vasudeva, N and Jayasing, A and Ghosh, U and Pandey, A (2024) Sensing Platform for �-Electron-Rich Analytes. In: ACS Applied Optical Materials .

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Abstract

Metal nanoparticles are excellent absorbers and scatterers of light due to localized surface plasmon resonance (LSPR) at the metal-dielectric interface. LSPRs have been extensively studied and shown to act as sensitive dielectric-refractive index sensors. However, all refractive index-based sensors, by their design, encounter difficulties in distinguishing between dielectrics with similar refractive indices. We developed a material made of metal nanoparticles embedded into a cysteine-based coordination polymer that shows strong light scattering, particularly at shorter wavelengths. We show that the scattering spectrum of this material changes measurably in the presence of �-electron-rich species, enabling the detection of analytes even in cases where traditional refractive index-based sensors fail. Metrics for our sensors are also proposed. This work considerably enhances the capabilities of existing refractive index-based plasmonic sensors. © 2024 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Optical Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the publisher.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	12 Sep 2024 09:26
Last Modified:	12 Sep 2024 09:26
URI:	http://eprints.iisc.ac.in/id/eprint/86137

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