Issue 11, 2022

Towards multi-molecular surface-enhanced infrared absorption using metal plasmonics

Abstract

Surface-enhanced infrared absorption (SEIRA) leads to a largely improved detection of polar molecules, compared to standard infrared absorption. The enhancement principle is based on localized surface plasmon resonances of the substrate, which match the frequency of molecular vibrations in the analyte of interest. Therefore, in practical terms, the SEIRA sensor needs to be tailored to each specific analyte. We review SEIRA sensors based on metal plasmonics for the detection of biomolecules such as DNA, proteins, and lipids. We further focus this review on chemical SEIRA sensors, with potential applications in quality control, as well as on the improvement in sensor geometry that led to the development of multiresonant SEIRA substrates as sensors for multiple analytes. Finally, we give an introduction into the integration of SEIRA sensors with surface-enhanced Raman scattering (SERS).

Graphical abstract: Towards multi-molecular surface-enhanced infrared absorption using metal plasmonics

Article information

Article type
Review Article
Submitted
06 6 2022
Accepted
25 8 2022
First published
29 8 2022

Nanoscale Horiz., 2022,7, 1259-1278

Towards multi-molecular surface-enhanced infrared absorption using metal plasmonics

M. Wagner, A. Seifert and L. M. Liz-Marzán, Nanoscale Horiz., 2022, 7, 1259 DOI: 10.1039/D2NH00276K

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