Electrode Selection
Electrode Selection - Related Videos
08:03
Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research
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Cited by 3 •
2013
All-solid-state ion-selective electrodes (ASSISEs) constructed from a conductive polymer (CP) transducer provide several months of functional lifetime in liquid media. Here, we describe the fabrication and calibration process of ASSISEs in a lab-on-a-chip format. The ASSISE is demonstrated to have maintained a near-Nernstian slope profile after prolonged storage in complex biological media.
03:02
Standard Electrode Potentials
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2020
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
08:29
Fabrication of Amperometric Electrodes
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Cited by 8 •
2009
This protocol describes how to generate carbon fiber electrodes. The electrodes are subsequently used to detect catecholamine release from vesicles with carbon fiber amperometry.
06:48
Natural Selection - Concepts
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2019
Fitness Widespread variation of phenotypes in natural populations provides the raw material for evolution, which is the change in the inherited traits of populations over successive generations. Natural selection is one of the main mechanisms of evolution and requires variable traits to be heritable and associated with differential survival and/or reproductive success. Phenotypes that correlate with greater success will have more offspring that survive to reproduce in the next generation, and...
03:14
Artificial Selection - Concepts
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2019
Natural Selection and Adaptive Evolution In natural settings, adaptive evolution takes place by natural selection, a process in which differences in traits lead to differences in survival and reproductive success between individuals. This happens because individuals with certain phenotypes have a higher probability of survival and/or produce more surviving offspring than individuals with other phenotypes. A classic example of this was demonstrated by Rosemary and Peter Grant studying the...
FAQs
Contact impedance influences how effectively bioelectric signals are recorded across the electrode-tissue interface, while polarization describes charge-related behavior at that interface. Together, these properties can alter signal quality and contribute to artifacts. Considering them during selection helps match an electrode to the intended recording or stimulation task and supports more reliable measurements or controlled current delivery.
Surface area affects the way electrical signals are collected and how stimulation current is distributed at the tissue interface. The appropriate area depends on the target tissue and intended use. A suitable choice can improve recording fidelity or support safer stimulation by balancing current distribution with practical contact requirements, while an unsuitable configuration may reduce performance or increase irritation.
Material choice contributes to charge-transfer behavior, biocompatibility, and durability at the electrode-tissue interface. These properties must be considered together rather than evaluated only for signal quality or stimulation efficiency. In medical research and practice, the selected material should support the intended electrical function while limiting tissue irritation and remaining sufficiently durable for the planned use.
Configuration should follow the target tissue, clinical purpose, and required access to the body. Surface electrodes support applications such as electrocardiography, whereas needle electrodes are used for electromyography. Implanted configurations serve contexts including neural recording, cardiac pacing, and therapeutic stimulation. This distinction helps align electrode placement and interface characteristics with the measurement or treatment objective.
Begin by identifying whether the goal is bioelectric recording or electrical stimulation, then consider the target tissue and the required electrode configuration. Evaluate surface area, contact impedance, polarization, charge-transfer properties, biocompatibility, durability, and potential tissue irritation. Reviewing these factors together helps researchers and clinicians choose a design that balances signal fidelity, current distribution, effectiveness, and patient safety.
The relevant configuration changes with the biological source and access required for the measurement. Surface electrodes can support electrocardiography, while needle electrodes are associated with electromyography. Neural recording may require an implanted configuration. These applications illustrate why selection cannot rely on one universal electrode design: target tissue and intended use determine which interface and placement are appropriate.
An appropriate choice should provide faithful bioelectric recording or effective electrical stimulation while maintaining suitable current distribution at the tissue interface. It should also balance biocompatibility, durability, and limited tissue irritation. In practice, the selection is successful when electrical performance supports the intended medical application without compromising patient safety or the reliability of the resulting measurements.