Faculty Publications

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Subject: search.filters.subject.Dopamine

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    Electrochemical determination of dopamine using zinc-oxide rod modified carbon paste electrode
    (American Scientific Publishers order@aspbs.com, 2016) Jayannaa, R.P.; Badekai Ramachandra, B.R.
    An excellent limit of detection 2.7 ?M for Dopamine was achieved voltommetrically using ZnO rod modified carbon paste electrode. Zinc oxide rods (ZnOR) were synthesized using low temperature hydrothermal method. The structural and morphology study of ZnOR structures was performed by scanning electron microscopy (SEM), X-ray diffraction (XRD) techniques and energy dispersive X-ray (EDX) spectroscopy. As-synthesized ZnOR were used to construct the modified carbon paste electrode (ZnOR/CPE) and investigated for the dopamine (DA) detection. The modified electrode showed excellent catalytic activity towards the DA at pH 7.0 phosphate buffer solution. The cyclic voltammetry (CV) and differential pulse voltammetry techniques (DPV) were used for DA determination. Under optimum conditions, the fabricated sensor exhibits best sensing performance with high sensitivity of 1080 ?A mM?1cm?2with linear response range obtained from 0–800 ?M of DA for DPV. The ZnOR/CPE exhibits excellent sensitivity, greater stability and reproducibility. © 2016 American Scientific Publishers. All rights reserved.
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    Unveiling the Versatile Applications of Cobalt Oxide-Embedded Nitrogen-Doped Porous Graphene for Enhanced Energy Storage and Simultaneous Determination of Ascorbic Acid, Dopamine and Uric Acid
    (Institute of Physics, 2024) Agadi, N.P.; Hegde, S.S.; Teradal, N.L.; Badekai Ramachandra, B.R.; Seetharamappa, J.
    The advancement of electrode materials is essential for addressing the energy and biomedical challenges. A multi-functional approach was employed to create a new electrode material of cobalt oxide-embedded nitrogen-doped porous graphene (Co3O4@NpG) for sensing and energy storage applications. In the present study, we have fabricated a new electrochemical sensing platform based on Co3O4@NpG. The sensing performance and selective detection capability of the demonstrated sensor was optimized and tested by determining dopamine (DA), uric acid (UA), and ascorbic acid (AA) simultaneously in analyte fortified biological samples. The sensing response is noticed to be linearly dependent upon the concentration of AA, DA, and UA in the range of 0.1-450, 0.1-502, and 0.2-396 μM, respectively. This material also showed good electrochemical energy storage performance when assessed as a supercapacitor electrode. The Co3O4@NpG electrode material showcased a remarkable specific capacitance of 314.58 Fg−1, an energy density of 10.06 Wh kg−1 at a power density of 240 Wkg−1 at 0.5 Ag−1, in a 6 M KOH electrolyte, along with excellent long-term cycling stability. Hence, the material Co3O4@NpG stands out as a promising multifunctional electrode candidate, excelling in the precise simultaneous detection of critical biomolecules besides exhibiting superior energy storage performance. © 2024 The Electrochemical Society (“ECS”). Published on behalf of ECS by IOP Publishing Limited. All rights, including for text and data mining, AI training, and similar technologies, are reserved.