Autor según el artículo: Rajendran AA; Guo K; Alvarez-Fernandez A; Gengenbach TR; Velasco MB; Fornerod MJ; Shafique K; Füredi M; Formentín P; Haji-Hashemi H; Guldin S; Voelcker NH; Cetó X; Prieto-Simón B
Departamento: Enginyeria Electrònica, Elèctrica i Automàtica
Autor/es de la URV: Ambily Rajendran, Anandapadmanabhan / Formentín Vallés, Pilar / Haji Hashemi Varnosfaderani, Hedieh / Prieto Simón, Beatriz / Shafique, Kandeel
Palabras clave: Porous silicon Polyfurfuryl alcohol Electrochemical transducer Dna sensor Carbon-stabilization
Resumen: Carbon-based nanomaterials are key to developing high-performing electrochemical sensors with improved sensitivity and selectivity. Nonetheless, limitations in their fabrication and integration into devices often constrain their practical applications. Moreover, carbon nanomaterials-based electrochemical devices still face problems such as large background currents, poor stability, and slow kinetics. To advance towards a new class of carbon nanostructured electrochemical transducers, we propose the in-situ polymerization and carbonization of furfuryl alcohol (FA) on porous silicon (pSi) to produce a tailored and highly stable transducer. The thin layer of polyfurfuryl alcohol (PFA) that conformally coats the pSi scaffold transforms into nanoporous carbon when subjected to pyrolysis above 600 °C. The morphological and chemical properties of PFA-pSi were characterized by scanning electron microscopy, and Raman and X-ray photoelectron spectroscopies. Their stability and electrochemical performance were investigated by cyclic voltammetry and electrochemical impedance spectroscopy in [Fe(CN)6]3-/4-, [Ru(NH3)6]2+/3+, and hydroquinone. PFA-pSi showed superior electrochemical performance compared to screen-printed carbon electrodes while also surpassing glassy carbon electrodes in specific aspects. Besides, PFA-pSi has the additional advantage of easy tuning of the electroactive surface area. To prove its potential for biosensing purposes, a DNA sensor based on quantifying the partial pore blockage of the pSi upon target hybridization was built on PFA-pSi. The sensor showed a limit of detection of 1.4 pM, outperforming other sensors based on the same sensing mechanism.
Áreas temáticas: Mechanical engineering Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science
Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
Direcció de correo del autor: kandeel.shafique@urv.cat beatriz.prieto-simon@urv.cat hedieh.hajihashemi@urv.cat hedieh.hajihashemi@urv.cat pilar.formentin@urv.cat pilar.formentin@urv.cat anandapadmanabhan.ambily@estudiants.urv.cat anandapadmanabhan.ambily@estudiants.urv.cat kandeel.shafique@urv.cat
Identificador del autor: 0000-0001-8016-1565 0000-0002-1619-6912 0000-0002-1619-6912
Fecha de alta del registro: 2024-02-17
Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
Enlace a la fuente original: https://www.sciencedirect.com/science/article/pii/S2590049824000018?via%3Dihub
Referencia al articulo segun fuente origial: Materials Today Advances. 21
Referencia de l'ítem segons les normes APA: Rajendran AA; Guo K; Alvarez-Fernandez A; Gengenbach TR; Velasco MB; Fornerod MJ; Shafique K; Füredi M; Formentín P; Haji-Hashemi H; Guldin S; Voelcke (2024). A new class of porous silicon electrochemical transducers built from pyrolyzed polyfurfuryl alcohol. Materials Today Advances, 21(), -. DOI: 10.1016/j.mtadv.2024.100464
URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
DOI del artículo: 10.1016/j.mtadv.2024.100464
Entidad: Universitat Rovira i Virgili
Año de publicación de la revista: 2024
Tipo de publicación: Journal Publications