Improving the Performance of a Bioelectronic Tongue Using Silver Nanowires. Application to Milk Analysis

Salvo-Comino, Coral; Martín-Bartolomé, Patricia; Pura, José Luis; Perez-Gonzalez, Clara; Martín-Pedrosa, Fernando; Garcı́a, C.; Rodrı́guez-Méndez, M.L.

doi:10.2139/ssrn.3992993

Cited by 1 publication

(2 citation statements)

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“…[28] Silver nanowires were reported as excellent electron transfer mediator for electrochemical catechol sensor. [29,30] The introduction of zwitterionic polymer coated AgNPs was reported to strongly enhances the detection signal. [31] The study also reports that the polymer coated silver nanoparticles (AgNPs) modified gold disk electrode gave an oxidation peak at 0.21 V and a reduction peak at À 0.005 V.…”

Section: Introductionmentioning

confidence: 99%

“…Cu quantum dots loaded on graphdiyne nanosheets was also reported to act as nanocatalyst to amplify electrochemical signal and reduces the oxidation potential for OP pesticides [28] . Silver nanowires were reported as excellent electron transfer mediator for electrochemical catechol sensor [29,30] . The introduction of zwitterionic polymer coated AgNPs was reported to strongly enhances the detection signal [31] .…”

Section: Introductionmentioning

confidence: 99%

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An Amperometric Acetylcholinesterase Biosensor Based on Polyvinyl‐Alcohol‐Capped Silver Nanoparticles (AgNPs@PVA) for Detection of Organophosphate Pesticides

et al. 2023

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In the present study polyvinyl alcohol (PVA) capped AgNPs (AgNPs@PVA) were used as nanocarrier for fabrication of an acetylcholinesterase (AChE) biosensor for organophosphate (OP) pesticide detection. AChE enzyme was immobilized via glutaraldehyde on drop casted AgNPs@PVA layer on glassy carbon electrode (GCE) for fabrication of the electrochemical biosensor. Through differential pulse voltammetry (DPV) the biosensor measured peak current at 0.6 V generated by AChE mediated hydrolysis of acetylthiocholine (ATCl) to thiocholine and its subsequent oxidation to dimer. By hindering AChE hydrolysis activity of the sensor probe by a model OP pesticide, malathion, the pesticide biosensor was developed as the inhibition effect was found to be proportional to the concentration of malathion. The fabricated biosensor exhibits linearity at range of 0.01 to 1 ng/mL of malathion at optimal conditions with detection limit (LOD) of 2.6 pg/mL. The fabricated AChE biosensor showed good selectivity for OP pesticides and exhibited good efficiency in real sample analysis.

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