Molecularly imprinted silica films prepared by electroassisted deposition for the selective detection of dopamine
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Título: | Molecularly imprinted silica films prepared by electroassisted deposition for the selective detection of dopamine |
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Autor/es: | Porcel-Valenzuela, María | Salinas-Castillo, Alfonso | Morallon, Emilia | Montilla, Francisco |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Molecular imprinting | Electrodeposited silica | Dopamine, Ascorbic acid | Electrochemical sensor |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | ene-2016 |
Editor: | Elsevier |
Cita bibliográfica: | Sensors and Actuators B: Chemical. 2016, 222: 63-70. doi:10.1016/j.snb.2015.08.042 |
Resumen: | Dopamine (DA) can be detected by electrochemical oxidation in conventional electrodes. However, the presence of other oxidizable species (interferents) usually present in physiological fluids at high concentrations (like ascorbic acid) makes very difficult its electrochemical detection. In the present work, glassy carbon electrodes have been modified with molecularly imprinted silica (MIS) films prepared by electroassisted deposition of sol–gel precursors. The production of MIS films was performed by adding the template molecule (DA) to the precursor sol. The molecular impression of silica was assessed showing a high coherency allowing a filtering capacity in the molecular scale. The MIS-modified electrodes present a high selectivity for the detection of DA in neutral or acidic solutions. The MIS-modified electrodes allow the amperometric determination of dopamine in solutions containing ascorbic acid with molar ratios lower than 1:50,000. |
Patrocinador/es: | We acknowledge the financial support from the Fundación Ramón Areces (CIVP16A1821), Spanish Ministerio de Economía y Competitividad (MAT2013-42007-P) and Generalitat Valenciana (PROMETEO2013/038). |
URI: | http://hdl.handle.net/10045/49032 |
ISSN: | 0925-4005 (Print) | 1873-3077 (Online) |
DOI: | 10.1016/j.snb.2015.08.042 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2015 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.snb.2015.08.042 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2015_Porcel_etal_SNB_final.pdf | Versión final (acceso restringido) | 2,15 MB | Adobe PDF | Abrir Solicitar una copia |
2015_Porcel_etal_SNB_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,79 MB | Adobe PDF | Abrir Vista previa |
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