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Related Concept Videos

Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...

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Updated: Jul 5, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Published on: October 20, 2021

Switchable Polymer Based Thin Film Coils as a Power Module for Wireless Neural Interfaces.

S Kim1, K Zoschke, M Klein

  • 1Dept of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT, USA.

Sensors and Actuators. A, Physical
|April 29, 2008
PubMed
Summary

This study presents novel microfabricated coils for wireless power transfer, crucial for reliable, long-term operation of implantable neural interface devices like the Utah Electrode Array (UEA). These thin-film coils offer tunable resonance for efficient power delivery without transcutaneous wires.

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Chronic Implantation of Multiple Flexible Polymer Electrode Arrays
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Last Updated: Jul 5, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
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Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing

Published on: October 20, 2021

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays
08:54

Chronic Implantation of Multiple Flexible Polymer Electrode Arrays

Published on: October 4, 2019

Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Electrical Engineering

Background:

  • Implantable medical devices, such as the Utah Electrode Array (UEA) for neural interfaces, require reliable chronic operation.
  • Eliminating transcutaneous wire connections is essential for signal processing, powering, and communication.
  • Existing power sources like micro-batteries and micro-fuel cells do not meet the power density and lifetime requirements for neural interfaces.

Purpose of the Study:

  • To develop a wireless power source integrated with the UEA.
  • To investigate inductive coupling as a promising approach for powering implantable devices with restricted dimensions.
  • To design and fabricate power receiving coils that maximize inductance and quality factor.

Main Methods:

  • Microfabrication of power receiving coils using polymer-based thin-film technologies.
  • Design of flexible, stacked thin-film coils enabling parallel and serial switching for resonance frequency tuning.
  • Characterization of electrical properties and investigation of power transmission performance under laboratory conditions.

Main Results:

  • Fabrication of thin-film coils with maximized inductance and quality factor.
  • Demonstration of flexible coil configurations allowing tunable resonance frequency.
  • Successful laboratory investigation of power transmission capabilities for implantable device applications.

Conclusions:

  • Inductive coupling using microfabricated thin-film coils is a viable approach for wireless powering of implantable neural interface devices.
  • The developed coils offer tunable resonance and high performance, addressing limitations of current power sources.
  • This technology paves the way for more reliable and integrated chronic operation of medical implants.