Bacterial Peroxidase on Electrochemically Reduced Graphene Oxide for Highly Sensitive H 2 O 2 Detection

Peroxidase enzymes enable the construction of electrochemical sensors for highly sensitive and selective quantitative detection of various molecules, pathogens and diseases. Herein, we describe the immobilization of a peroxidase from Bacillus s. (BsDyP) on electrochemically reduced graphene oxide (E...

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Veröffentlicht in:Chembiochem : a European journal of chemical biology 2022-09, Vol.23 (17), p.e202200346
Hauptverfasser: Bhardwaj, Sheetal K, Knaus, Tanja, Garcia, Amanda, Yan, Ning, Mutti, Francesco G
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container_issue 17
container_start_page e202200346
container_title Chembiochem : a European journal of chemical biology
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creator Bhardwaj, Sheetal K
Knaus, Tanja
Garcia, Amanda
Yan, Ning
Mutti, Francesco G
description Peroxidase enzymes enable the construction of electrochemical sensors for highly sensitive and selective quantitative detection of various molecules, pathogens and diseases. Herein, we describe the immobilization of a peroxidase from Bacillus s. (BsDyP) on electrochemically reduced graphene oxide (ERGO) deposited on indium tin oxide (ITO) and polyethylene terephthalate (PET) layers. XRD, SEM, AFM, FT-IR and Raman characterization of the sensor confirmed its structural integrity and a higher enzyme surface occupancy. The BsDyP-ERGO/ITO/PET electrode performed better than other horseradish peroxidase-based electrodes, as evinced by an improved electrochemical response in the nanomolar range (linearity 0.05-280 μM of H O , LOD 32 nM). The bioelectrode was mechanically robust, active in the 3.5-6 pH range and exhibited no loss of activity upon storage for 8 weeks at 4 °C.
doi_str_mv 10.1002/cbic.202200346
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subjects Biosensing Techniques
Electrochemical Techniques
Electrodes
Graphite - chemistry
Peroxidase
Spectroscopy, Fourier Transform Infrared
title Bacterial Peroxidase on Electrochemically Reduced Graphene Oxide for Highly Sensitive H 2 O 2 Detection
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