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An Ultrahighly Pressure Sensitive Electronic Fish Skin for Underwater Wave Sensing.

Chengxiu Yang1, Jiafei Hu1, Shaowei Wu1

  • 1College of Intelligence Science and Technology, National University of Defense Technology (NUDT), Deya Road 109, Changsha 410073, China.

ACS Applied Materials & Interfaces
|April 11, 2023
PubMed
Summary

We developed a biomimetic electronic fish skin that ultra-sensitively detects weak underwater pressure waves. This flexible sensor shows potential for monitoring marine life and environmental changes.

Keywords:
MXeneartificial hair cellelectronic fish skinpseudocapacitanceultrahighly sensitive

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Area of Science:

  • Materials Science
  • Biomimetics
  • Sensor Technology

Background:

  • Underwater flexible sensors are crucial for monitoring marine life and environmental changes.
  • Sensing weak pressure waves from biological swimming and undercurrents remains a significant challenge.

Purpose of the Study:

  • To develop an ultra-highly sensitive biomimetic electronic fish skin for underwater sensing.
  • To address the limitations of existing sensors in detecting subtle pressure disturbances.

Main Methods:

  • Designed a biomimetic electronic fish skin with a pseudocapacitive-based artificial hair cell.
  • Assembled the hair cell using hybrid film electrodes (MXene/holey reduced graphene oxide/l-cysteine) and an acidic electrolyte foam.
  • Integrated the artificial hair cell into a simulated canal neuromast encapsulation structure.

Main Results:

  • Achieved ultra-high sensitivity (up to ~173688 kPa⁻¹) over a wide depth range (0-100 m).
  • Demonstrated excellent stability over 10,000 repeated tests.
  • Successfully used the sensor to monitor fish motion by detecting minor disturbances.

Conclusions:

  • The developed electronic fish skin offers a promising solution for sensitive underwater pressure sensing.
  • Potential applications include flow field monitoring, ocean current detection, and seismic wave warning.