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Título

Bismuth nanoparticles for phenolic compounds biosensing application

AutorMayorga-Martínez, Carmen C. ; Cadevall, Miquel; Guix, María; Ros, Josep; Merkoçi, Arben
Palabras clavePhenol compounds
Bismuth nanoparticles
Tyrosinase
Amperometric biosensor
Fecha de publicación2013
EditorElsevier
CitaciónBiosensors and Bioelectronics 40(1): 57-62 (2013)
ResumenThe rapid determination of trace phenolic compounds is of great importance for evaluating the total toxicity of contaminated water samples. Nowadays, electrochemical tyrosinase (Tyr) based biosensors constitute a promising technology for the in situ monitoring of phenolic compounds because of their advantages such as high selectivity, low production cost, promising response speed, potential for miniaturization, simple instrumentation and easy automatization. A mediator-free amperometric biosensor for phenolic compounds detection based on the combination of bismuth nanoparticles (BiNPs) and Tyr for phenol detections will be hereby reported. This is achieved through the integration of BiNPs/Tyr onto the working electrode of a screen printed electrode (SPE) by using glutaraldehyde as a cross-linking agent. BiNPs/Tyr biosensor is evaluated by amperometric measurements at –200 mV DC and a linear range of up to 71 μM and 100 μM and a correlation coefficient of 0.995 and 0.996 for phenol and catechol, respectively. The very low DC working potential ensures the avoidance of interferences making this biosensor an advantageous device for real sample applications. In addition, the response mechanism including the effect of BiNPs based on electrochemical studies and optical characterizations will be also discussed. The obtained results may open the way to many other BiNPs applications in the biosensing field.
URIhttp://hdl.handle.net/10261/99193
DOI10.1016/j.bios.2012.06.010
Identificadoresdoi: 10.1016/j.bios.2012.06.010
issn: 0956-5663
e-issn: 1873-4235
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