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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...

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Open-source Toolkit: Benchtop Carbon Fiber Microelectrode Array for Nerve Recording
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Published on: October 29, 2021

Nanoelectrodes for biological measurements.

Joanne I Yeh1, Haibin Shi

  • 1Department of Structural Biology and Department of Bioengineering, University of Pittsburgh Medical School, BST3 1040, 3501 5th Avenue, Pittsburgh, PA 15260, USA. jiyeh@pitt.edu

Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
|January 15, 2010
PubMed
Summary

Nanoelectrodes, tiny electrodes for biological analysis, offer significant advantages for developing sensitive and specific biosensors. These nanodevices hold immense potential for personalized medical care and improved human health.

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Area of Science:

  • Nanotechnology
  • Electrochemistry
  • Biological Analysis

Background:

  • Nanoelectrodes are electrodes with critical dimensions from 1 to hundreds of nanometers.
  • They encompass individual electrodes, nanoelectrode ensembles, and arrays.
  • Materials like metallic nanowires, carbon nanotubes, and nanoparticles are used for fabrication.

Purpose of the Study:

  • To review the applications of nanoelectrodes in biological analysis.
  • To highlight the advantages of nanoelectrodes in various biological investigations.
  • To emphasize their potential in developing advanced biosensors.

Main Methods:

  • Review of existing literature on nanoelectrode fabrication and applications.
  • Evaluation of single electrodes, nanoelectrode arrays, and ensembles.
  • Focus on biological analysis and biosensor development.

Main Results:

  • Nanoelectrodes provide advantages in single-cell studies, microchip fabrication, and coordinated biosensor design.
  • They enable addressable patterned electrodes for precise analysis.
  • Potential for efficient, specific, sensitive, and intelligent sensor development.

Conclusions:

  • Nanoelectrodes are crucial for advancing biological and medical diagnostics.
  • Cost-effective fabrication and materials development accelerate their use in clinical devices.
  • Nanodevices have profound implications for personalized medicine and societal health.