The Impact Of Plasmonically Generated Hot-carriers On Sers Analysis

Zoltowski, Chelsea M.

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https://hdl.handle.net/2142/116849 Copy

Description

Title

The Impact Of Plasmonically Generated Hot-carriers On Sers Analysis

Author(s)

Zoltowski, Chelsea M.

Contributor(s)

Schultz, Zachary

Issue Date

2022-06-22

Keyword(s)

Coblentz Special Session

Abstract

Plasmonic nanostructures have paved the way for the development of surface enhanced Raman spectroscopy (SERS); a technique that takes advantage of the Raman signal specific to the molecular vibrational modes. SERS enhances the Raman signal up to 109-fold allowing for lower limits of detection. Through the illumination of the nanostructure with a laser, a localized surface plasmon resonance (LSPR) is excited and further the enhances the electric field at the surface of the nanostructure. While the excitation of the LSPR enhances the Raman signal, it can also generate hot carries that cause the formation of photoproducts that can change the Raman signal. Photoproducts have been reported for various nanostructures in different SERS experiments and can include cross-linking/dimerization, fragmentation, and radical formation. Understanding the parameters and occurrences of these photoproducts will allow for the ability to prevent them when not desired and generate them for further applications. Previously, our group has reported on radical formation with the amino acid tryptophan as well as 4-mercaptobenzoic acid, a common Raman reporter molecule. This work will use changes in the SERS signal to elaborate on the conditions and dynamics of these radical formation reactions associated with the plasmonic activity of nanostructures.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116849

DOI

https://doi.org/10.15278/isms.2022.WE11

Copyright and License Information

Copyright 2022 held by the authors

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