Spatially-Localized Functionalization on Nanostructured Surfaces for Enhanced Plasmonic Sensing Efficacy

Overview

Journal Nanomaterials (Basel)

Date 2022 Oct 27

PMID 36296775

Authors

Jean-Francois Bryche

Marlo Vega

Agnes Tempez

Thibault Brule

Thomas Carlier

Julien Moreau

Marc Chaigneau

Paul G Charette

Michael Canva

Affiliations

Soon will be listed here.

Abstract

This work demonstrates the enhancement in plasmonic sensing efficacy resulting from spatially-localized functionalization on nanostructured surfaces, whereby probe molecules are concentrated in areas of high field concentration. Comparison between SERS measurements on nanostructured surfaces (arrays of nanodisks 110 and 220 nm in diameter) with homogeneous and spatially-localized functionalization with thiophenol demonstrates that the Raman signal originates mainly from areas with high field concentration. TERS measurements with 10 nm spatial resolution confirm the field distribution profiles predicted by the numerical modeling. Though this enhancement in plasmonic sensing efficacy is demonstrated with SERS, results apply equally well to any type of optical/plasmonic sensing on functionalized surfaces with nanostructuring.

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