Electrochemical Pretreatment of Carbon Fiber Microelectrodes Based on Sinusoidal-wave Potential Cycling and its Application to Amperometric Sensing of Bioactive Compounds

Vladimir      Halouzka; Jan      Hrbac; David      Jirovsky; Daniel      Riman; Petr      Jakubec; Zdenka      Bartosova; Vlastimil      Masek; Peter      Mojzes; Jan      Vacek

doi:10.2174/1573411011309020015

Abstract

We demonstrate the electrochemical pretreatment of carbon fiber microelectrodes (CFEs) based on the sinusoidal- wave potential cycling (50 Hz) of CFEs prior to amperometric analysis. The surface modification and morphology of CFEs after pretreatment was studied using Raman spectroscopy and scanning electron microscopy. The pretreated CFEs were extensively tested for sensing of bioactive compounds (dopamine, nitric oxide, ascorbate and nitrite) by constant current amperometry at 830 mV vs. Ag/AgCl.

Keywords: Carbon fiber, dopamine, microelectrode, nitric oxide, pretreatment, sensor

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Current Analytical Chemistry

Title:Electrochemical Pretreatment of Carbon Fiber Microelectrodes Based on Sinusoidal-wave Potential Cycling and its Application to Amperometric Sensing of Bioactive Compounds

Volume: 9 Issue: 2

Author(s): Vladimir Halouzka, Jan Hrbac, David Jirovsky, Daniel Riman, Petr Jakubec, Zdenka Bartosova, Vlastimil Masek, Peter Mojzes and Jan Vacek

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Keywords: Carbon fiber, dopamine, microelectrode, nitric oxide, pretreatment, sensor

Abstract: We demonstrate the electrochemical pretreatment of carbon fiber microelectrodes (CFEs) based on the sinusoidal- wave potential cycling (50 Hz) of CFEs prior to amperometric analysis. The surface modification and morphology of CFEs after pretreatment was studied using Raman spectroscopy and scanning electron microscopy. The pretreated CFEs were extensively tested for sensing of bioactive compounds (dopamine, nitric oxide, ascorbate and nitrite) by constant current amperometry at 830 mV vs. Ag/AgCl.

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Halouzka Vladimir, Hrbac Jan, Jirovsky David, Riman Daniel, Jakubec Petr, Bartosova Zdenka, Masek Vlastimil, Mojzes Peter and Vacek Jan, Electrochemical Pretreatment of Carbon Fiber Microelectrodes Based on Sinusoidal-wave Potential Cycling and its Application to Amperometric Sensing of Bioactive Compounds, Current Analytical Chemistry 2013; 9 (2) . https://dx.doi.org/10.2174/1573411011309020015