RT info:eu-repo/semantics/article
T1 Raman, UV–Vis Absorption, and Fluorescence Spectroelectrochemistry for Studying the Enhancement of the Raman Scattering Using Nanocrystals Activated by Metal Cations
A1 Hernández Muñoz, Sheila
A1 Pérez Estébanez, Martín
A1 Cheuquepan Valenzuela, William
A1 Perales Rondon, Juan Víctor
A1 Heras Vidaurre, Aránzazu
A1 Colina Santamaría, Álvaro
K1 Química analítica
K1 Chemistry, Analytic
K1 Electroquímica
K1 Electrochemistry
AB Raman signal enhancement is fundamental to develop different analytical tools for chemical analysis, interface reaction studies, or new materials characterization, among others. Thus, phenomena such as surface-enhanced Raman scattering (SERS) have been used for decades to increase the sensitivity of Raman spectroscopy, leading to a huge development of this field. Recently, an alternative method to SERS for the amplification of Raman signals has been reported. This method, known as electrochemical surface oxidation-enhanced Raman scattering (EC-SOERS), has been experimentally described. However, to date, it has not yet been fully understood. In this work, new experimental data that clarify the origin of the Raman enhancement in SOERS are provided. The use of a complete and unique set of combined spectroelectrochemistry techniques, including time-resolved operando UV–vis absorption, fluorescence, and Raman spectroelectrochemistry, reveals that such enhancement is related to the generation of dielectric or semiconductor nanocrystals on the surface of the electrode and that the interaction between the target molecule and the dielectric substrate is mediated by metal cations. According to these results, the interaction metal electrode–nanocrystal–metal cation–molecule is proposed as being responsible for the Raman enhancement in Ag and Cu substrates. Elucidation of the origin of the Raman enhancement will help to promote the rational design of SOERS substrates as an attractive alternative to the well-known SERS phenomenon.
PB ACS Publications
SN 0003-2700
YR 2023
FD 2023-10-23
LK http://hdl.handle.net/10259/9318
UL http://hdl.handle.net/10259/9318
LA eng
NO This work was funded by the Ministerio de Ciencia e Innovación and Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033 and PID2020-113154RB-C21), Ministerio de Ciencia, Innovación y Universidades (RED2022-134120-T).
DS Repositorio Institucional de la Universidad de Burgos
RD 11-dic-2024