Artículo
Mechanisms of Enzymatic Transduction in Nanochannel Biosensors
Fecha de publicación:
09/2022
Editorial:
Wiley VCH Verlag
Revista:
Chemistry-an Asian Journal
ISSN:
1861-4728
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The immobilization of enzymes in solid-state nanochannels is a new avenue for the design of biosensors with outstanding selectivity and sensitivity. This work reports the first theoretical model of an enzymatic nanochannel biosensor. The model is applied to the system previously experimentally studied by Lin, et al. (Anal. Chem. 2014, 86, 10546): a hourglass nanochannel modified by glucose oxidase for the detection of glucose. Our predictions are in good agreement with experimental observations as a function of the applied potential, pH and glucose concentration. The sensing mechanism results from the combination of three processes: i) the establishment of a steady-state proton concentration gradient due to a reaction-diffusion mechanism, ii) the effect of that gradient on the charge of the adsorbed enzymes and native surface groups, and iii) the effect of the resulting surface charge on the ionic current. Strategies to improve the sensor performance based on this mechanism are identified and discussed.
Palabras clave:
ELECTROSTATIC
,
ENZYME
,
NANOFLUIDICS
,
NANOPORE
,
REACTION-DIFFUSION
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Identificadores
Colecciones
Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Pérez Sirkin, Yamila Anahí; Vigil De Maio, Manuel; Tagliazucchi, Mario Eugenio; Mechanisms of Enzymatic Transduction in Nanochannel Biosensors; Wiley VCH Verlag; Chemistry-an Asian Journal; 17; 17; 9-2022; 1-11
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