Impedance Sensing Applications
Impedance Sensing Applications - Related Videos
12:30
Electric Cell-substrate Impedance Sensing for the Quantification of Endothelial Proliferation, Barrier Function, and Motility
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Cited by 213 •
2014
This protocol reviews Electric Cell-substrate Impedance Sensing, a method to record and analyze the impedance spectrum of adherent cells for the quantification of cell attachment, proliferation, motility, and cellular responses to pharmacological and toxic stimuli. Detection of endothelial permeability and assessment of cell-cell and cell-substrate contacts are emphasized.
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Measuring SMC Contraction In Vitro: A Non-Invasive Method to Evaluate Smooth Muscle Cells Contraction using Electric Cell-Substrate Impedance Sensing
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2025
This video describes the measurement of aortic smooth muscle cell (SMC) contraction using electrical cell-substrate impedance sensing, or ECIS. ECIS measures the locomotion of cells and is a reliable method for measuring contractions.
08:59
Electrochemical Impedance Spectroscopy
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2023
Source: Kara Ingraham, Jared McCutchen, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Electrical resistance is the ability of an electrical circuit element to resist the flow of electricity. Resistance is defined by Ohm's Law: (Equation 1) Where is the voltage and is the current. Ohm's law is useful for determining the resistance of ideal resistors. However, many circuit elements are more complex and can't be described by...
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The Sense of Self: Reflected Self-Appraisal and Social Comparison
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2020
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
04:17
Approximate Number Sense Test
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University A common carnival game is to ask people to guess the number of jellybeans packed into a jar. The chances that anyone will get the exact number right are low. But what about the chances that someone will guess 17 or 147,000? Probably even less than the chances of guessing the correct answer; 17 and 147,000 just seem irrational. Why? After all, if the beans cannot be taken out and counted one-at-a-time, how can someone tell that an...
FAQs
The magnitude and phase of impedance provide complementary information about a system’s response to alternating current. Changes in magnitude can indicate altered conductivity or interfacial behavior, while phase shifts can reveal changes involving permittivity or charge-transfer behavior. Examining both therefore helps characterize materials, interfaces, and evolving conditions.
The measured response reflects material and interfacial effects. Conductivity relates to how readily current passes, permittivity concerns the material’s response to the electrical field, and electrode interfaces can contribute their own behavior. Charge-transfer changes add another interpretive layer, so researchers examine impedance features together rather than treating one value as a complete description.
Using a small AC excitation helps obtain information while avoiding extensive disturbance of the sample. Repeated measurements can then track changes in impedance magnitude and phase as composition, material state, or an interface changes. This combination supports sensitive observation and real-time monitoring where preserving the measured system matters.
The workflow begins by applying a small AC excitation to the system. The sensor determines impedance from the resulting voltage and current, after which magnitude and phase are examined for changes. Those changes are related to conductivity, permittivity, electrode-interface behavior, or charge-transfer behavior, depending on what the measurement is intended to characterize.
A sensor must deliver the AC excitation and capture the resulting voltage and current so impedance can be determined. The measured system also includes the material or interface under study, whose conductivity, permittivity, or charge-transfer behavior affects the response. This arrangement lets the experiment focus on material properties, interfaces, or changing conditions.
They are used to characterize electrolytes and materials, monitor corrosion, support biosensing, and detect composition or state changes without extensively disturbing a sample. In physics and engineering, these applications connect electrical measurements with material and interface behavior. The ability to follow changes over time also makes the approach useful for real-time monitoring in research and industrial systems.