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  1. Siti Farah Nadiah Rusli, Mimi Hani Abu Bakar, Loh Kee Shyuan, Mohd Shahbudin Mastar, Seratul Jemiah Abdul Rani, Mohd Shahbudin Mastar
    Sains Malaysiana, 2018;47:3017-3023.
    Aryl diazonium salts are coupling agents that assist in molecules attachment to interfaces for sensing purposes. Despite
    not being fully explored and not yet widely applicable for cell-based sensors, the high stability of aryl diazonium salt
    formed sensing system is highly favorable in biological applications. Carbon-based electrodes are the most commonly
    used in aryl diazonium modification due to its post grafting stable C-C bond formation. Here, salt bridge based microbial
    fuel cells (MFCs) were used to study on the effect of aryl diazonium modification on the anode graphite fibre brush. Aryl
    diazonium salts were in situ generated by the diazonation of p-phenylenediamine with NaNO2 in HCl solution. The
    electrochemical performance of the aryl diazonium modified graphite brush MFC was measured and compared with the
    unmodified graphite brush MFC. The power output of the modified graphite brush bioanode was higher (8.33 W/m3
    )
    than the unmodified graphite brush (7.60 W/m3
    ) after 20 days of operation with ferricyanide as the catholyte. After 70
    days of operation using phosphate buffer solution as the catholyte, the Pmax of modified brush was three times higher
    (0.06 W/m3
    ) than of the unmodified brush (0.02 W/m3
    ), which indicates an enhanced binding towards the substrate that
    facilitates a better electron transfer between the microbial and electrode surface.
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