Faculty Publications

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Subject: search.filters.subject.Cyclic Voltametry

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    Smart handheld platform for electrochemical bio sensors
    (Institute of Electrical and Electronics Engineers Inc., 2017) Hebbar, S.; Kumar, V.; Bhat, M.S.; Bhat, N.
    In this paper we present a smart handheld system for point of care biosensors. The system consists of a novel multi-path potentiostat module which performs electrochemical measurements on disposable test strip. The strip provides a port for applying bio-sample such as blood or urine. The analyte port on the disposable strip is designed with 3 sets of 3 electrodes (Working, Reference and Counter electrodes) screen printed on a Polyethylene Terephthlate (PET) substrate. The system provides the unique capability of performing Cyclic Voltametry and Chrono Amperometry measurements in three parallel paths, facilitating simultaneous measurement of three bio-analytes. The system is very generic and flexible, with user defined inputs for voltage, sweep rate and time through 5 inch capacitive touch screen. The experimental results can be stored on micro SD card and the data is accessible with USB or Bluetooth interface. © 2016 IEEE.
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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.