Quantifying the Contribution of Chemical Enhancement to SERS: A Model Based on the Analysis of Light-Induced Degradation Processes

authored by: Bo Liu, Bonito Thielert, Andreas Reutter, Rainer Stosch, Peter Lemmens
Abstract: Surface-enhanced Raman scattering (SERS) is of growing importance in different fields, from clinical analysis/chemistry to food industry. For a better insight into the complex light-matter interaction processes that are underlying the intensity enhancement, it is essential to experimentally distinguish and quantify the contributions based on the chemical mechanism (CM) with respect to the electromagnetic mechanism. Here, we present a model to estimate the relative CM response of Raman modes by analyzing light-induced degradation of target molecules on designed metal/semiconductor SERS substrates. The resulting intensity evolution is described by a biexponential function with two model parameters that allow a differentiation of the enhancement processes. Our work thereby provides a means for a better understanding of CM and will be advantageous for an application of intensity-based quantitative SERS techniques.
External Organisation(s): Technische Universität Braunschweig
Type: Article
Journal: Journal of Physical Chemistry C
Volume: 123
Pages: 19119-19124
No. of pages: 6
ISSN: 1932-7447
Publication date: 08.08.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Energy(all), Physical and Theoretical Chemistry, Surfaces, Coatings and Films
Electronic version(s): https://doi.org/10.1021/acs.jpcc.9b04526 (Access: Closed)

BibTeX

@article{0d99ee19986c421c94ecb7f3e55101f7,
title = "Quantifying the Contribution of Chemical Enhancement to SERS: A Model Based on the Analysis of Light-Induced Degradation Processes",
abstract = "Surface-enhanced Raman scattering (SERS) is of growing importance in different fields, from clinical analysis/chemistry to food industry. For a better insight into the complex light-matter interaction processes that are underlying the intensity enhancement, it is essential to experimentally distinguish and quantify the contributions based on the chemical mechanism (CM) with respect to the electromagnetic mechanism. Here, we present a model to estimate the relative CM response of Raman modes by analyzing light-induced degradation of target molecules on designed metal/semiconductor SERS substrates. The resulting intensity evolution is described by a biexponential function with two model parameters that allow a differentiation of the enhancement processes. Our work thereby provides a means for a better understanding of CM and will be advantageous for an application of intensity-based quantitative SERS techniques.",
author = "Bo Liu and Bonito Thielert and Andreas Reutter and Rainer Stosch and Peter Lemmens",
note = "Funding Information: We gratefully acknowledge the support of the Braunschweig International Graduate School of Metrology B-IGSM, DFG Research Training Group GrK1952 “Metrology for Complex Nanosystems” and DFG − EXS 2123 QuantumFrontiers, Light and Matter at the Quantum Frontier. We thank Stefan Wundrack for important discussion contributions.",
year = "2019",
month = aug,
day = "8",
doi = "10.1021/acs.jpcc.9b04526",
language = "English",
volume = "123",
pages = "19119--19124",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "31",
}