Linear Sweep Voltammetry
Linear Sweep Voltammetry - Related Videos
08:37
Cyclic Voltammetry (CV)
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2023
Source: Laboratory of Dr. Kayla Green — Texas Christian University A Cyclic Voltammetry (CV) experiment involves the scan of a range of potential voltages while measuring current. In the CV experiment, the potential of an immersed, stationary electrode is scanned from a predetermined starting potential to a final value (called the switching potential) and then the reverse scan is obtained. This gives a 'cyclic' sweep of potentials and the current vs. potential curve derived from the data is...
09:23
High-Definition Transcranial Direct Current Stimulation During Sleep
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2025
This protocol describes high-definition transcranial direct current stimulation during sleep with simultaneous electroencephalography monitoring to investigate causal relationships between targeted brain regions and sleep as well as its related processes.
12:16
Quantitative Measurement of the Immune Response and Sleep in Drosophila
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Cited by 17 •
2012
To understand a link between the immune response and behavior, we describe a method to measure locomotor behavior in Drosophila during bacterial infection as well as the ability of flies to mount an immune response by monitoring survival, bacterial load, and real-time activity of a key regulator of innate immunity, NFκB.
08:45
Polygraphic Recording Procedure for Measuring Sleep in Mice
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Cited by 55 •
2016
The recording of electroencephalogram (EEG) and electromyogram (EMG) in freely behaving mice is a critical step to correlate behavior and physiology with sleep and wakefulness. The experimental protocol described herein provides a cable-based system for acquiring EEG and EMG recordings in mice.
01:20
Voltammetry: Overview
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2024
Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram. A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
FAQs
Scan rate controls how quickly the working-electrode potential traverses the measurement range. Comparing responses at different constant scan rates can help separate effects associated with reactant diffusion from those associated with electron-transfer kinetics. This makes scan rate an important experimental variable when chemists interpret voltammograms and assess how rapidly a redox process proceeds.
Current reflects more than electron transfer alone. The concentration of electroactive species influences the available reactant, while diffusion governs its movement during the sweep. Considering both factors helps chemists avoid attributing every current change to reaction kinetics and supports more informed interpretation of voltammograms and the chemical processes they represent.
The reference electrode establishes the potential against which the working electrode is swept, allowing the experiment to relate observed current to a controlled electrochemical condition. The working electrode is the site where oxidation or reduction produces the measured response. Using both roles together makes potential-dependent current interpretable for redox characterization and kinetic assessment.
A typical measurement uses a working electrode, a reference electrode, a controlled potential sweep, and current recording. The potential changes linearly at a constant scan rate relative to the reference electrode while the current response is monitored. The resulting voltammogram is then examined for redox responses, electrochemical potentials, kinetics, diffusion, and concentration-related behavior.
Because the method provides redox and potential information through a straightforward measurement, researchers apply it in analytical chemistry, energy research, corrosion studies, and sensor development. It is useful when the goal is to examine an electroactive analyte in solution, investigate material behavior, or understand electrochemical responses relevant to sensing or corrosion.
Measurements can support identification of electrochemical potentials, characterization of redox behavior, estimation of reaction kinetics, and evaluation of materials or analytes in solution. The current-potential record therefore helps chemists connect an observed response with chemical reactivity, diffusion, reactant concentration, or the electrochemical behavior of a material under study.