Potential Scanning
Potential Scanning - Related Videos
02:28
Leaky Scanning
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2020
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
12:03
Differential Scanning Calorimetry
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2023
Source: Danielle N. Beatty and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Differential scanning calorimetry (DSC) is an important measurement to characterize thermal properties of materials. DSC is used primarily to calculate the amount of heat stored in a material as it heats up (heat capacity) as well as the heat absorbed or released during chemical reactions or phase changes. However, measurement of this heat can also lead to...
06:50
Electric Potential
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Electric potential, also known as "voltage", measures the electric potential energy per unit charge. Electric field is a scalar quantity and is fundamental to many electrical effects. Like potential energy, what is physically meaningful is the difference in the electric potential. For example, the spatial variation in the electric potential is related to the electric...
00:52
Potential Energy
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2019
The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy. Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
11:41
Scanning Electron Microscopy (SEM)
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2023
Source: Laboratory of Dr. Andrew J. Steckl — University of Cincinnati A scanning electron microscope, or SEM, is a powerful microscope that uses electrons to form an image. It allows for imaging of conductive samples at magnifications that cannot be achieved using traditional microscopes. Modern light microscopes can achieve a magnification of ~1,000X, while typical SEM can reach magnifications of more than 30,000X. Because the SEM doesn’t use light to create images, the resulting pictures it...
FAQs
The current recorded during a scan is interpreted alongside the applied electrode potential. Changes in this response can indicate where oxidation or reduction occurs, while the overall pattern provides information about redox potentials, reaction kinetics, and diffusion effects. This makes the measurement useful for connecting an observed signal with the behavior of an electroactive chemical system.
The working electrode is the site whose potential is varied, whereas the reference electrode provides the potential relationship against which that variation is assessed. The measurement records the current resulting from the working-electrode response. Keeping these roles distinct allows the signal to be related to controlled potential changes rather than treated as an unreferenced electrical measurement.
Electron transfer determines whether an electroactive species can undergo oxidation or reduction at the electrode. Potential scanning examines this behavior across changing potential values, helping relate a chemical response to the relevant redox process. That relationship supports evaluation of reaction mechanisms, especially when researchers need to understand how a system produces its measured electrochemical signal.
Researchers establish a working electrode and a reference electrode, vary the working electrode’s potential relative to the reference, and record the resulting current. They then examine the potential-dependent response for evidence of redox behavior, reaction kinetics, or diffusion effects. This sequence produces the electrochemical information used for subsequent chemical interpretation.
It is useful when the target species is electroactive and produces a measurable response as electrode potential changes. Researchers can use the resulting behavior to support identification and quantification, while also examining reaction mechanisms. This makes the approach relevant to analytical chemistry, where chemical composition must be connected to an electrochemical measurement.
In corrosion studies, the method helps examine electrochemical behavior associated with materials. In energy-storage research, it contributes to characterizing electrode materials and their responses. For electrochemical sensors, it supports the study of signals from electroactive species. Across these areas, the measured current-potential relationship provides a basis for comparing chemical or material behavior.