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Related Concept Videos

Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...

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Updated: Jun 17, 2026

Stereocilia Bundle Imaging with Nanoscale Resolution in Live Mammalian Auditory Hair Cells
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Published on: January 21, 2021

The piezoionic diode: field-driven amplification of mechano-ionic conversion.

Bolong Li1,2, Kai Yang1,2, Jinyu Shao1

  • 1Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, China. derekho@cityu.edu.hk.

Materials Horizons
|June 16, 2026
PubMed
Summary
This summary is machine-generated.

A new piezoionic effect diode (PIED) amplifies output by actively driving ion separation. This self-powered device enables enhanced tactile sensing and in-sensor computation for soft electronics.

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Area of Science:

  • Soft electronics
  • Biomedical engineering
  • Materials science

Background:

  • Piezoionics integrates soft electronics with biological systems for applications like self-powered sensing and neural interfaces.
  • Conventional piezoionic devices suffer from low output due to the inability to actively drive ion-counterion separation.

Purpose of the Study:

  • Introduce a novel piezoionic effect diode (PIED) for enhanced stimulus-response in self-powered devices.
  • Demonstrate the PIED's capability for amplified mechanoelectrical output and in-sensor computation.

Main Methods:

  • Fabrication of a piezoionic effect diode (PIED).
  • Characterization of the device's mechanoelectrical conversion efficiency and ionic rectification properties.
  • Evaluation of the PIED as a self-powered tactile sensor for generating neural-like signals.

Main Results:

  • The PIED achieves a 12.3× enhancement in voltage output (30.5 mV) and a 27.3× enhancement in current output (2.46 µA).
  • The device exhibits a maximum power density of 20.7 nW cm-2 and ionic rectification with a ratio of 7.8.
  • The PIED successfully functions as a self-powered tactile sensor, converting mechanical stimuli into neural-like spike signals.

Conclusions:

  • The developed piezoionic effect diode represents a new device category within piezoionics.
  • The PIED enables significant amplification of output signals and facilitates in-sensor digital computation.
  • This innovation expands the potential of piezoionic devices for both self-powered sensing and neuromorphic computing applications.