Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes

Boron-doped diamond (BDD) is of increasing interest for applications in electrochemical sensing. It is well known that the sp2 carbon content in BDD influences its electrochemical properties as electrode material. In this work, evidence is provided that the surface sp2 carbon content plays a crucial...

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Main Authors: Zhichao Liu, André F. Sartori, Josephus G. Buijnsters
Format: Article
Language:English
Published: Elsevier 2021-09-01
Series:Electrochemistry Communications
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1388248121001806
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spelling doaj-904b96256c8049249a44136d73c070e52021-09-01T04:20:30ZengElsevierElectrochemistry Communications1388-24812021-09-01130107096Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodesZhichao Liu0André F. Sartori1Josephus G. Buijnsters2Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The NetherlandsDepartment of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The NetherlandsCorresponding author.; Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The NetherlandsBoron-doped diamond (BDD) is of increasing interest for applications in electrochemical sensing. It is well known that the sp2 carbon content in BDD influences its electrochemical properties as electrode material. In this work, evidence is provided that the surface sp2 carbon content plays a crucial role in the electrochemical sensitivity of BDD towards glucose. Single-crystal BDD, freestanding polycrystalline BDD and glassy carbon (sp2 carbon reference material) were examined by voltammetry. Neither single-crystal BDD, which is free of sp2 carbon, nor pure sp2 glassy carbon could detect glucose in the range of 0.2–1.0 V. On the other hand, glucose oxidation was observed on polycrystalline BDD, and with increasing intensity with increase of sp2 carbon content. Thus, an optimum amount of (B-doped) sp2 carbon in the BDD electrode is needed for best sensing performance. Understanding this, and being able to control the composition of BDD, are not only important to glucose detection but to any electrochemical sensing application involving BDD.http://www.sciencedirect.com/science/article/pii/S1388248121001806Boron-doped diamond (BDD)Glucose detectionSp2 carbonNon-enzymaticSingle-crystal BDD
collection DOAJ
language English
format Article
sources DOAJ
author Zhichao Liu
André F. Sartori
Josephus G. Buijnsters
spellingShingle Zhichao Liu
André F. Sartori
Josephus G. Buijnsters
Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
Electrochemistry Communications
Boron-doped diamond (BDD)
Glucose detection
Sp2 carbon
Non-enzymatic
Single-crystal BDD
author_facet Zhichao Liu
André F. Sartori
Josephus G. Buijnsters
author_sort Zhichao Liu
title Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
title_short Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
title_full Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
title_fullStr Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
title_full_unstemmed Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
title_sort role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes
publisher Elsevier
series Electrochemistry Communications
issn 1388-2481
publishDate 2021-09-01
description Boron-doped diamond (BDD) is of increasing interest for applications in electrochemical sensing. It is well known that the sp2 carbon content in BDD influences its electrochemical properties as electrode material. In this work, evidence is provided that the surface sp2 carbon content plays a crucial role in the electrochemical sensitivity of BDD towards glucose. Single-crystal BDD, freestanding polycrystalline BDD and glassy carbon (sp2 carbon reference material) were examined by voltammetry. Neither single-crystal BDD, which is free of sp2 carbon, nor pure sp2 glassy carbon could detect glucose in the range of 0.2–1.0 V. On the other hand, glucose oxidation was observed on polycrystalline BDD, and with increasing intensity with increase of sp2 carbon content. Thus, an optimum amount of (B-doped) sp2 carbon in the BDD electrode is needed for best sensing performance. Understanding this, and being able to control the composition of BDD, are not only important to glucose detection but to any electrochemical sensing application involving BDD.
topic Boron-doped diamond (BDD)
Glucose detection
Sp2 carbon
Non-enzymatic
Single-crystal BDD
url http://www.sciencedirect.com/science/article/pii/S1388248121001806
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