A new class of porous silicon electrochemical transducers built from pyrolyzed polyfurfuryl alcohol

Anandapadmanabhan A. Rajendran, Keying Guo, Alberto Alvarez-Fernandez, Thomas R. Gengenbach, Marina B. Velasco, Maximiliano J. Fornerod, Kandeel Shafique, Máté Füredi, Pilar Formentín, Hedieh Haji-Hashemi, Stefan Guldin, Nicolas H. Voelcker, Xavier Cetó, Beatriz Prieto-Simón

Producción científica: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

1 Cita (Scopus)

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.
Idioma originalInglés
Número de artículo100464
Número de páginas14
PublicaciónMaterials Today Advances
Volumen21
DOI
EstadoPublicada - mar 2024

Huella

Profundice en los temas de investigación de 'A new class of porous silicon electrochemical transducers built from pyrolyzed polyfurfuryl alcohol'. En conjunto forman una huella única.

Citar esto