The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Christian Amatore - One of the best experts on this subject based on the ideXlab platform.
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Ohmic drop compensation in cyclic voltammetry at scan rates in the megavolt per second range: access to nanometric diffusion layers via transient electrochemistry
Journal of Electroanalytical Chemistry, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is discussed. This Potentiostat allows the electrochemical investigation of nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates in the megavolt per second range. This range of scan rate corresponds to the development of diffusion layers having only a few nanometers thickness. The principle and properties of the Potentiostat are first demonstrated analytically based on a simplified equivalent circuit for the conditions used in this study (v
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ohmic drop compensation in cyclic voltammetry at scan rates in the megavolt per second range access to nanometric diffusion layers via transient electrochemistry
Journal of Electroanalytical Chemistry, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is discussed. This Potentiostat allows the electrochemical investigation of nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates in the megavolt per second range. This range of scan rate corresponds to the development of diffusion layers having only a few nanometers thickness. The principle and properties of the Potentiostat are first demonstrated analytically based on a simplified equivalent circuit for the conditions used in this study (v<5 MV s−1). The validity of this simplified analytical approach is then tested and further investigated by precise simulations of the electronic properties of the real circuit, and then by experimental tests on RC dummy cells or on dummy cells equipped with a pseudo-faradaic impedance. These tests establish that the Potentiostat behaves excellently up to slightly above 2 MV s−1. These results were then confirmed by examination of the reduction voltammetry of anthracene in highly concentrated (0.9 M) supporting electrolyte to avoid interference with transport in the double layer, since usual supporting electrolyte concentrations would produce double layers of the same thicknesses as the diffusion layers that are created in this range of scan rates. These tests confirmed the results of the above investigations and finally demonstrated that this Potentiostat allows the recording of undistorted voltammograms up to 2.25 MV s−1.
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ultrafast cyclic voltammetry performing in the few megavolts per second range without ohmic drop
Electrochemistry Communications, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is used to investigate nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates of a few megavolts per second. This range of scan rates corresponds to the development of diffusion layers whose widths are only a few nanometers thick. Independent tests on dummy cells (Bode plots) demonstrated that the Potentiostat behaved excellently in the megavolt per second range. Examination of the well-established voltammetric reduction of anthracene in highly concentrated (0.9 M) supporting electrolyte confirmed that this Potentiostat allowed the recording of undistorted ohmic drop-free voltammograms up to 2.25 MV s−1.
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new concept for a Potentiostat for on line ohmic drop compensation in cyclic voltammetry above 300 kv s 1
Journal of Electroanalytical Chemistry, 1992Co-Authors: Christian Amatore, Christine LefrouAbstract:A new concept for a Potentiostat is presented for ohmic drop compensation in submicrosecond cyclic voltammetry. Theory and simulations of the Potentiostat allow the prediction of most of its characteristics, which are then confirmed experimentally on dummy cells. Reduction of anthracene in acetonitrile is examined as a test experimental case. It is thus shown that the Potentiostat affords perfectly ohmic drop corrected voltammograms up to scan rates exceeding 300 kV s−1. If the data are corrected further to eliminate the slight constant potential shift due to filtering by the Potentiostat (first-order filter correction), scan rates exceeding 0.5 MV s−1 are achievable without distortion.
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New concept for a Potentiostat for on-line ohmic drop compensation in cyclic voltammetry above 300 kV s−1
Journal of Electroanalytical Chemistry, 1992Co-Authors: Christian Amatore, Christine LefrouAbstract:A new concept for a Potentiostat is presented for ohmic drop compensation in submicrosecond cyclic voltammetry. Theory and simulations of the Potentiostat allow the prediction of most of its characteristics, which are then confirmed experimentally on dummy cells. Reduction of anthracene in acetonitrile is examined as a test experimental case. It is thus shown that the Potentiostat affords perfectly ohmic drop corrected voltammograms up to scan rates exceeding 300 kV s−1. If the data are corrected further to eliminate the slight constant potential shift due to filtering by the Potentiostat (first-order filter correction), scan rates exceeding 0.5 MV s−1 are achievable without distortion.
Gerard Simonneau - One of the best experts on this subject based on the ideXlab platform.
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ohmic drop compensation in cyclic voltammetry at scan rates in the megavolt per second range access to nanometric diffusion layers via transient electrochemistry
Journal of Electroanalytical Chemistry, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is discussed. This Potentiostat allows the electrochemical investigation of nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates in the megavolt per second range. This range of scan rate corresponds to the development of diffusion layers having only a few nanometers thickness. The principle and properties of the Potentiostat are first demonstrated analytically based on a simplified equivalent circuit for the conditions used in this study (v<5 MV s−1). The validity of this simplified analytical approach is then tested and further investigated by precise simulations of the electronic properties of the real circuit, and then by experimental tests on RC dummy cells or on dummy cells equipped with a pseudo-faradaic impedance. These tests establish that the Potentiostat behaves excellently up to slightly above 2 MV s−1. These results were then confirmed by examination of the reduction voltammetry of anthracene in highly concentrated (0.9 M) supporting electrolyte to avoid interference with transport in the double layer, since usual supporting electrolyte concentrations would produce double layers of the same thicknesses as the diffusion layers that are created in this range of scan rates. These tests confirmed the results of the above investigations and finally demonstrated that this Potentiostat allows the recording of undistorted voltammograms up to 2.25 MV s−1.
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Ohmic drop compensation in cyclic voltammetry at scan rates in the megavolt per second range: access to nanometric diffusion layers via transient electrochemistry
Journal of Electroanalytical Chemistry, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is discussed. This Potentiostat allows the electrochemical investigation of nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates in the megavolt per second range. This range of scan rate corresponds to the development of diffusion layers having only a few nanometers thickness. The principle and properties of the Potentiostat are first demonstrated analytically based on a simplified equivalent circuit for the conditions used in this study (v
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ultrafast cyclic voltammetry performing in the few megavolts per second range without ohmic drop
Electrochemistry Communications, 2000Co-Authors: Christian Amatore, Emmanuel Maisonhaute, Gerard SimonneauAbstract:A new concept of a three-electrode Potentiostat involving positive feedback compensation of ohmic drop is used to investigate nanosecond time scales by allowing the recording of ohmic drop-free voltammograms at scan rates of a few megavolts per second. This range of scan rates corresponds to the development of diffusion layers whose widths are only a few nanometers thick. Independent tests on dummy cells (Bode plots) demonstrated that the Potentiostat behaved excellently in the megavolt per second range. Examination of the well-established voltammetric reduction of anthracene in highly concentrated (0.9 M) supporting electrolyte confirmed that this Potentiostat allowed the recording of undistorted ohmic drop-free voltammograms up to 2.25 MV s−1.
Chun-yueh Huang - One of the best experts on this subject based on the ideXlab platform.
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Design of a portable mini Potentiostat for electrochemical biosensors
2017 IEEE 2nd Advanced Information Technology Electronic and Automation Control Conference (IAEAC), 2017Co-Authors: Chun-yueh Huang, Hsin-ta Huang, Ruei-ting YuanAbstract:In this paper, a portable mini Potentiostat is proposed for the signal processing of electrochemical biosensors. The proposed Potentiostat consists of two circuit blocks: one is the digital circuit and the other is the analog circuit. The digital circuit includes a microprocessor which is used to control the operation of the Potentiostat and to generate the programmable waveform for a biosensor's analysis. The analog circuit is used to realize the function of the Potentiostat and to measure the biosensor's current. The proposed Potentiostat can perform general electrochemical analysis functions, such as cyclic voltammetry and amperometry, and its total area is 4.5*5 cm2. After the electrochemical analysis is completed, we design a data analysis interface to provide the biosensor's designer a tool to catch the response of the biosensor from analysis data. In the experiment, we adopt a nitrate biosensor to verify the performance of the proposed Potentiostat. The experimental results show that the proposed Potentiostat has the merits of small size, good accuracy, low cost, low power consumption, and high portability.
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Design of a Potentiostat with Standalone Signal Generator for Vanillylmandelic Acid Biosensors
2016 International Symposium on Computer Consumer and Control (IS3C), 2016Co-Authors: Chun-yueh Huang, Ming-feng Sun, Hung-yin LinAbstract:In this paper, a portable Potentiostat with standalone signal generator is proposed for the signal processing of vanillylmandelic acid (VMA) biosensors. The proposed Potentiostat primarily consists of two microprocessors: one is used to design the programmable waveform generator, and the other is used to measure the current of the biosensors. It can perform general electrochemical analysis functions, such as cyclic voltammetry, linear sweep voltammetry, differential pulse voltammetry, amperometry, and potentiometry. In the experiment, we adopt a VMA biosensor to verify the performance of the proposed Potentiostat. The experimental results show that the proposed Potentiostat has the merits of good accuracy, low cost, low power consumption, and high portability.
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Design of a Portable Potentiostat with Dual-microprocessors for Electrochemical Biosensors
Universal Journal of Electrical and Electronic Engineering, 2015Co-Authors: Chun-yueh HuangAbstract:In this paper, we design and implement a portable Potentiostat by using dual-microprocessors for the signal processing of electrochemical biosensors. In our design approach, one of the microprocessors is used to design the programmable waveform generator, and the other microprocessor is used to measure the current of biosensors. The proposed Potentiostat can perform general electrochemical analysis functions, including cyclic voltammetry, linear sweep voltammetry, differential pulse voltammetry, amperometry, and potentiometry. In the experiment, we adopt a commercial screen printed electrode immersed in potassium ferricyanide solution to test the performance of the proposed Potentiostat and compare the proposed Potentiostat's measured results with a commercial Potentiostat's (CH Instrument Model: CHI1221) under the same test condition. The experimental results show that the proposed Potentiostat has the merits of good accuracy, low cost, low power consumption, and high portability.
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Design and implementation of a voltammetry Potentiostat with wide dynamic current range measurement for electrochemical biosensors
Analog Integrated Circuits and Signal Processing, 2014Co-Authors: Chun-yueh HuangAbstract:In this paper, we design a voltammetry Potentiostat chip with wide range current measurement for the signal processing of electrochemical biosensors. In this design, the current of biosensors will be detected and divided into four regions, and then be diminished in accordance with corresponding current scaling ratio. All the ranges of the biosensor's current will be diminished to a proper current range (≤2.5 μA) and then be converted into frequency-modulated pulses by a sigma---delta modulator in a fixed conversion time. The aim of this design is to deal with the large dynamic current range of signal processing for different biosensors in applications. The measured results of proposed Potentiostat can be digitized by a microprocessor without using a high resolution ADC. The proposed Potentiostat is fabricated by 0.35 μm CMOS technology, and the chip layout core area is 0.31 mm2. The function of the proposed Potentiostat has been tested and measured in our laboratory, and the measurement results show that the dynamic range of signal processing, from 1 nA to 2 mA, is 126 dB. The power consumption under normal operation is 10 mW. The proposed voltammetry Potentiostat has successfully applied to the signal processing system of a melatonin biosensor.
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Design of a voltammetry Potentiostat with wide dynamic current range measurement
2013 International Conference on Communications Circuits and Systems (ICCCAS), 2013Co-Authors: Chun-yueh Huang, Shi-yi ZengAbstract:In this paper, we design a voltammetry Potentiostat chip with wide range current measurement for the signal processing of electrochemical biosensors. In this design, the current of biosensors will be detected and divided into four regions, and then be diminished in accordance with corresponding current scaling ratio. All the ranges of the biosensor's current will be diminished to a proper current range (≤ 2.5 μA) and then be converted into frequency-modulated pulses by a sigma-delta modulator in a fixed conversion time. The aim of this design is to deal with the large dynamic current range of signal processing for different biosensors in applications. The measured results of proposed Potentiostat can be digitized by a microprocessor without using a high resolution ADC. The proposed Potentiostat is fabricated by 0.35 μm CMOS technology, and the chip layout core area is 0.31 mm2. The function of the proposed Potentiostat has been tested and measured in our laboratory, and the measurement results show that the dynamic range of signal processing, from 1 nA to 2 mA, is 126 dB. The power consumption under normal operation is 10 mW.
Ivana Murković Steinberg - One of the best experts on this subject based on the ideXlab platform.
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A wireless Potentiostat for mobile chemical sensing and biosensing
Talanta, 2015Co-Authors: Matthew D. Steinberg, Petar Kassal, Irena Kereković, Ivana Murković SteinbergAbstract:Wireless chemical sensors are used as analytical devices in homeland defence, home-based healthcare, food logistics and more generally for the Sensor Internet of Things (SIoT). Presented here is a battery-powered and highly portable credit-card size Potentiostat that is suitable for performing mobile and wearable amperometric electrochemical measurements with seamless wireless data transfer to mobile computing devices. The mobile electrochemical analytical system has been evaluated in the laboratory with a model redox system - the reduction of hexacyanoferrate(III) - and also with commercially available enzymatic blood-glucose test-strips. The Potentiostat communicates wirelessly with mobile devices such as tablets or Smartphones by near-field communication (NFC) or with personal computers by radio-frequency identification (RFID), and thus provides a solution to the 'missing link' in connectivity that often exists between low-cost mobile and wearable chemical sensors and ubiquitous mobile computing products. The mobile Potentiostat has been evaluated in the laboratory with a set of proof-of-concept experiments, and its analytical performance compared with a commercial laboratory Potentiostat (R2=0.9999). These first experimental results demonstrate the functionality of the wireless Potentiostat and suggest that the device could be suitable for wearable and point-of-sample analytical measurements. We conclude that the wireless Potentiostat could contribute significantly to the advancement of mobile chemical sensor research and adoption, in particular for wearable sensors in healthcare and sport physiology, for wound monitoring and in mobile point-of-sample diagnostics as well as more generally as a part of the Sensor Internet of Things.
Kyle V Lopin - One of the best experts on this subject based on the ideXlab platform.
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psoc stat a single chip open source Potentiostat based on a programmable system on a chip
PLOS ONE, 2018Co-Authors: Prattana Lopin, Kyle V LopinAbstract:In this paper we demonstrate a Potentiostat built with a single commercially available integrated circuit (IC) that does not require any external electronic components to perform electrochemical experiments. This is done using the capabilities of the Programmable System on a Chip (PSoC®) by Cypress Semiconductor, which integrates all of the necessary electrical components. This is in contrast to other recent papers that have developed Potentiostats but require technical skills or specialized equipment to produce. This eliminates the process of having to make a printed circuit board and soldering on electronic components. To control the device, a graphical user interface (GUI) was developed in the python programming language. Python is open source, with a style that makes it easy to read and write programs, making it an ideal choice for open source projects. As the developed device is open source and based on a PSoC, modification to implement other electrochemical techniques is straightforward and only requires modest programming skills, but no expensive equipment or difficult techniques. The Potentiostat developed here adds to the growing amount of open source laboratory equipment. To demonstrate the PSoC Potentiostat in a wide range of applications, we performed cyclic voltammetry (to measure vitamin C concentration in orange juice), amperometry (to measure glucose with a glucose strip), and stripping voltammetry experiments (to measure lead in water). The device was able to perform all experiments and could accurately measure Vitamin C, glucose, and lead.
