Surface-enhanced raman scattering-based plasmonic sensors

Sachin Kumar Srivastava; Ibrahim Abdulhalim

doi:10.1201/9781003438304-9

Surface-enhanced raman scattering-based plasmonic sensors

Sachin Kumar Srivastava, Ibrahim Abdulhalim

School of Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

This chapter introduces surface-enhanced Raman spectroscopy (SERS), and discusses the role of electromagnetic enhancement due to plasmonic coupling. It presents the role of plasmonic nanostructure optimization in maximizing the SERS signal through an example of plasmonic nanosculptured thin films (nSTFs). Plasmons are the quanta of collective longitudinal oscillations of free electrons in bulk metals. Plasmonic nSTFs are basically porous films of plasmonic metals, which possess generally nanorod-like structures. Though Raman scattering is a wavelength-independent phenomenon, SERS enhancement depends on the resonant excitation of the plasmonic nanostructures along with the Stokes frequencies. Gold nanostructures connected to single-stranded DNA can be useful as micro-SERS probes for reaching ultra-low limits of detection.

Original language	English
Title of host publication	Plasmonics-Based Optical Sensors and Detectors
Editors	Jin Li, Anuj K Sharma, Banshi D. Gupta
Publisher	Jenny Stanford Publishing
Pages	241-275
Number of pages	35
ISBN (Electronic)	9781003438304
ISBN (Print)	9789814968850
DOIs	https://doi.org/10.1201/9781003438304-9
State	Published - 24 Aug 2023

ASJC Scopus subject areas

General Engineering
General Materials Science
General Physics and Astronomy

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10.1201/9781003438304-9

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AB - This chapter introduces surface-enhanced Raman spectroscopy (SERS), and discusses the role of electromagnetic enhancement due to plasmonic coupling. It presents the role of plasmonic nanostructure optimization in maximizing the SERS signal through an example of plasmonic nanosculptured thin films (nSTFs). Plasmons are the quanta of collective longitudinal oscillations of free electrons in bulk metals. Plasmonic nSTFs are basically porous films of plasmonic metals, which possess generally nanorod-like structures. Though Raman scattering is a wavelength-independent phenomenon, SERS enhancement depends on the resonant excitation of the plasmonic nanostructures along with the Stokes frequencies. Gold nanostructures connected to single-stranded DNA can be useful as micro-SERS probes for reaching ultra-low limits of detection.

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Surface-enhanced raman scattering-based plasmonic sensors

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