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Title: Trilacunary keggin type polyoxometalate-conducting polymer composites for amperometric glucose detection
Authors: Ayrancı, Rukiye
Torlak, Yasemin
Soğancı, Tuğba
Ak, Metin
Keywords: Composite films
Conducting polymers
Glucose sensors
Glucose oxidase
Graphite electrodes
Polymer films
Modified electrode
Amperometric biosensors
Bioelectrocatalytic reactions
Redox reactions
Semiconducting films
Amperometric detection
Amperometric response
Carbazole Derivatives
Conducting polymer composites
Electrocatalytic activity
Electrochemical techniques
Linear detection ranges
Surface morphology analysis
Keggin type polyoxometalate
Trilacunary keggin type polyoxometalate
Issue Date: 12-Oct-2018
Publisher: Electrochemical Society, Inc.
Abstract: A new amperometric glucose sensor has been fabricated based on a composite film prepared by electrochemical polymerization of carbazole derivative with having free amino group in presence of the Keggin type polyoxometalate (POM) anion, (nBu4N)3[PW9O34(tBuSiOH)3]. During the electropolymerization of 3-Amino-9-ethylcarbazole (AAC) on graphite electrode, simultaneously the POM has entrapped in the produced PAAC polymer film. POM/PAAC composite film was successfully synthesized and characterized with electrochemical techniques and surface morphology analyses. Metal/organic conducting polymeric composite has been composed of positively charged PAAC based conducting polymer and negatively charged POM structures. The amperometric response of the POM/PAAC-GOx modified electrode versus varying concentrations of glucose was studied at a potential value of -0.7 V (Ag/AgCl). It was determined that the POM/PAAC composite structure with the best sensor response has the lowest oxidation potential among the composite structures prepared at different ratios. Sensitivity of the POM/PAAC based sensor platform for actual glucose detections has been calculated as 66.66µA mM-1cm-2 with a linear detection range from 0.1 to 10 mM and detection limit of 0.099 mM. The POM/PACC composite has a unique structure thanks to such advantages the multiple redox reaction, high reactivity and rapid electron transfer of POMs. Especially, as-prepared this composite displayed high electrocatalytic activity for the amperometric detection of glucose with rapid response time, good sensitivity and reproducibility, acceptable recovery and simple preparation.
ISSN: 0013-4651
Appears in Collections:Fen-Edebiyat Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
Çal Meslek Yüksekokulu Koleksiyonu

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