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Issue 17, 2013
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Boron-doped graphene and boron-doped diamond electrodes: detection of biomarkers and resistance to fouling

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Abstract

Doped carbon materials are of high interest as doping can change their properties. Here we wish to contrast the electrochemical behaviour of two carbon allotropes – sp3 hybridized carbon as diamond and sp2 hybridized carbon as graphene – doped by boron. We show that even though both materials exhibit similar heterogeneous electron transfer towards ferro/ferricyanide, there are dramatic differences towards the oxidation of biomolecules, such as ascorbic acid, uric acid, dopamine and β-nicotinamide adenine dinucleotide (NADH). The boron-doped graphene exhibits much lower oxidation potentials than boron-doped diamond. The stability of the surfaces towards NADH oxidation product fouling has been studied and in the long term, there is no significant difference among the studied materials. The proton/electron coupled reduction of dopamine and nitroaromatic explosive (TNT) takes place on boron-doped graphene, while it is not observable at boron-doped diamond. These findings show that boron-doped sp2 graphene and sp3 diamond behave, in many aspects, dramatically differently and this shall have a profound influence upon their applicability as electrochemical materials.

Graphical abstract: Boron-doped graphene and boron-doped diamond electrodes: detection of biomarkers and resistance to fouling

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Publication details

The article was received on 18 Mar 2013, accepted on 31 May 2013, published on 02 Jul 2013 and first published online on 02 Jul 2013


Article type: Paper
DOI: 10.1039/C3AN00535F
Citation: Analyst, 2013,138, 4885-4891
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    Boron-doped graphene and boron-doped diamond electrodes: detection of biomarkers and resistance to fouling

    S. M. Tan, H. L. Poh, Z. Sofer and M. Pumera, Analyst, 2013, 138, 4885
    DOI: 10.1039/C3AN00535F

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