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High-stability flexible thin-film temperature sensor using MWCNTs-toughened Peano structure.

Zhaojun Liu1,2,3,4, Bian Tian5,6, Bogang Liu7,8

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Summary

Flexible thin-film temperature sensors were optimized using Peano structures and multi-walled carbon nanotubes (MWCNTs) for improved stability. The developed sensors are unaffected by deformation, offering reliable temperature measurements for various applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sensor Technology

Background:

  • Flexible thin-film temperature sensors offer conformal surface temperature measurement.
  • Sensor performance degrades due to installation deformation and testing stress.
  • Existing sensors lack stability under mechanical strain.

Purpose of the Study:

  • To develop a stable and reliable flexible thin-film temperature sensor.
  • To reduce internal stress in thin-film sensors using Peano structures.
  • To enhance thermoelectric properties with MWCNT doping.

Main Methods:

  • Utilized Peano structure for thin-film design optimization to minimize internal stress.
  • Doped Indium oxide (In2O3) with multi-walled carbon nanotubes (MWCNTs).
  • Optimized co-conformal deposition parameters for a powder-fiber staggered adhesive thin-film microstructure.

Main Results:

  • Developed a thermocouple-type flexible thin-film temperature sensor.
  • The sensor demonstrates high stability and reliability, unaffected by force or deformation.
  • Achieved reduced internal stress and enhanced thermoelectric properties.

Conclusions:

  • The Peano structure and MWCNT doping effectively enhance sensor stability and reliability.
  • The developed sensor is suitable for demanding contact and non-contact temperature measurements.
  • This technology shows promise for applications involving mechanical stress and deformation.