Print Email Facebook Twitter Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes Title Role of sp2 carbon in non-enzymatic electrochemical sensing of glucose using boron-doped diamond electrodes Author Liu, Z. (TU Delft Micro and Nano Engineering) Frota Sartori, A. (TU Delft Micro and Nano Engineering) Buijnsters, J.G. (TU Delft Micro and Nano Engineering) Date 2021 Abstract 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. Subject Boron-doped diamond (BDD)Glucose detectionNon-enzymaticSingle-crystal BDDSp carbon To reference this document use: http://resolver.tudelft.nl/uuid:45f51a54-c350-416a-84aa-a7a8773f9551 DOI https://doi.org/10.1016/j.elecom.2021.107096 ISSN 1388-2481 Source Electrochemistry Communications, 130 Part of collection Institutional Repository Document type journal article Rights © 2021 Z. Liu, A. Frota Sartori, J.G. Buijnsters Files PDF 1_s2.0_S1388248121001806_main.pdf 3.81 MB Close viewer /islandora/object/uuid:45f51a54-c350-416a-84aa-a7a8773f9551/datastream/OBJ/view