Electrochemical Sensors
Electrochemical Sensors - Related Videos
09:30
Bacterial Detection & Identification Using Electrochemical Sensors
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Cited by 6 •
2013
We describe an electrochemical sensor assay method for rapid bacterial detection and identification. The assay involves a sensor array functionalized with DNA oligonucleotide capture probes for ribosomal RNA (rRNA) species-specific sequences. Sandwich hybridization of target rRNA with the capture probe and a horseradish peroxidase-linked DNA oligonucleotide detector probe produces a measurable amperometric current.
08:19
Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing
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Cited by 34 •
2012
This article details the construction of a multiplexed microneedle-based sensor. The device is being developed for in situ sampling and electrochemical analysis of multiple analytes in a rapid and selective manner. We envision clinical medicine and biomedical research uses for these microneedle-based sensors.
07:39
Electrochemical Biosensing
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2023
Electrochemical biosensors detect the binding of a target molecule by sensing an oxidation-reduction event. These sensors paved the way for modern biosensing after the invention of the glucose biosensor. This video will introduce electrochemical biosensing, show the workings of the glucose biosensor, and discuss how electrochemical biosensors are used in cancer detection.
09:15
Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors
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Cited by 5 •
2016
The study demonstrates the growth of iridium oxide-reduced graphene oxide (IrO2-RGO) nanohybrid thin films on irregular and rough screen-printed carbon substrate through a green electrochemical synthesis, and their implementation as a pH sensor with a patterned paper-fluidic platform.
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...
FAQs
At the sensing interface, a selective recognition process at an electrode or ion-sensitive membrane limits the chemical information that participates in the measurement. Electrochemical reactions then translate that interaction into a change in current, voltage, or impedance. This coupling is important because the electrical response can be related to the concentration or activity of the target substance.
Current, voltage, and impedance provide different forms of electrical readout from the same general sensing architecture. A measured change in current or voltage can indicate a response associated with the target, while impedance captures a change in the system’s electrical behavior. These alternatives allow sensor outputs to be represented in forms suitable for monitoring and engineering analysis.
Electrode and membrane design directly affects how well an electrochemical sensor performs. The recognition interface must support selectivity, while the broader device must maintain sensitivity and stability during use. Advances in materials and microfabrication address these requirements by refining the sensing structure and enabling smaller integrated devices, helping engineers improve performance in compact sensor formats.
An engineering workflow begins by bringing the sample into contact with the relevant electrode or ion-sensitive membrane. The recognition event and associated electrochemical reaction produce an electrical response, which is then measured as current, voltage, or impedance. That signal is interpreted in relation to the substance’s concentration or activity, creating a route from sample exposure to analytical information.
Electrochemical sensors are useful when measurements must be made in changing environments or systems. Engineering applications include pollutant monitoring in water, biomolecule measurement for medical diagnostics, industrial process monitoring, corrosion detection, and battery management. These uses extend the same sensing principles across environmental, biomedical, manufacturing, infrastructure, and energy-related settings.
Small dimensions and low power requirements make these devices suitable for portable electronics. That combination supports water-quality assessment and compact diagnostic systems, while also allowing sensors to be incorporated into equipment that tracks corrosion or battery conditions. In engineering, compatibility with portable electronics broadens where real-time chemical monitoring can occur.