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oai:riubu.ubu.es:10259/100532025-07-25T11:25:55Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

Electrochemically generated CuI and CuSCN nanocrystals on Cu surfaces as Raman enhancing substrates Pérez Estébanez, Martín Cheuquepan Valenzuela, William Heras Vidaurre, Aránzazu Colina Santamaría, Álvaro Raman spectroscopy Spectroelectrochemistry EC-SOERS Copper substrates Química analítica Electroquímica Chemistry, Analytic Electrochemistry Raman enhancing strategies, such as Surface-Enhance Raman scattering (SERS), are a key piece for the development of spectroscopic and analytical strategies based on Raman spectroscopy, due to the intrinsic low sensitivity of the Raman scattering. Some years ago, our group reported an unexpected Raman enhancement process observed during the electrochemical oxidation of metallic electrodes, named Electrochemical Oxidation Surface-Enhanced Raman scattering (EC-SOERS). This Raman enhancement phenomenon was recently explained as an interaction of the analyte and the SERS dielectric substrate promoted by a metal cation. The elucidation of the origin of this enhancement is now leading to the development of new Raman enhancing substrates, such as copper-based substrates. In this work, we present an overview of the use of copper electrodes as EC-SOERS substrates. The presented strategies allow the electrosynthesis of SERS-active CuI nanocrystals on a metallic copper surface, which provides Raman enhancement for a wide number of molecules. The influence of the electrochemical conditions and the structure of the studied molecules are discussed. The use of CuSCN nanocrystals is also explored as substrates to promote Raman enhancement. Ministerio de Ciencia e Innovación and Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033, PID2020-113154RB-C21), Junta de Castilla y León and European Regional Development Fund (Grant number: BU036P23), Ministerio de Ciencia, Innovación y Universidades (RED2022-134120-T) are gratefully acknowledged for funding this work. M. P.-E. acknowledges Junta de Castilla y León and European Social Found for his predoctoral contract. W. Ch. acknowledges Junta de Castilla y León for his postdoctoral fellowship (Grant BU297P18) and funding received from Marie Sklodowska-Curie postdoctoral fellowship (Grant MSCA-IF-EF-ST 2020/101031622). 2025-01-29T07:35:14Z 2025-01-29T07:35:14Z 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0169-4332 http://hdl.handle.net/10259/10053 10.1016/j.apsusc.2024.159442 1873-5584 eng Applied Surface Science. 2024, V. 654, 159442 https://doi.org/10.1016/j.apsusc.2024.159442 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113154RB-C21/ES/APLICACION DE NUEVOS MATERIALES Y DISPOSITIVOS PARA EC-SERS Y EC-SOERS/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU036P23//Desarrollo de técnicas analíticas in-situ y en condiciones operando para el estudio de electrocatalizadores para la conversión electroquímica de nitrato de amoniaco/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/RED2022-134120-T/ES/RED DE SENSORES Y BIOSENSORES ELECTROQUIMICOS: RETOS ANTE LA TRANSFORMACION DIGITAL E INDUSTRIAL/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU297P18//Fusión de técnicas espectroelectroquímicas avanzadas/ info:eu-repo/grantAgreement/EC/H2020/101031622/EU/Biphasic Plasmonic Photoelectrocatalytic CO2 Reduction: electrochemically controlling plasmonic photo-charging of metallic nanofilms at immiscible liquid|liquid interfaces towards CO2 reduction/CO2PhotoElcat/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf Elsevier