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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

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Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
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Infrared Thermography for the Detection of Changes in Brown Adipose Tissue Activity
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Infrared thermochromic antenna composite for self-adaptive thermoregulation.

Francisco V Ramirez-Cuevas1,2, Kargal L Gurunatha1,3, Lingxi Li1

  • 1Department of Electronic & Electrical Engineering, Photonic Innovations Lab, University College London, London, UK.

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Researchers developed self-adaptive thermoregulation materials using infrared dipole antennas. These novel thermochromic materials offer significant emissivity switching for efficient, tunable heat management solutions.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Energy

Background:

  • Self-adaptive thermoregulation in organisms balances temperature.
  • Engineering material emissivity for adaptive thermal management is promising for decarbonization.
  • Existing solutions lack large emissivity switching, scalability, cost-effectiveness, and design freedom.

Purpose of the Study:

  • To develop scalable, cost-effective, and design-flexible materials for self-adaptive thermoregulation.
  • To engineer infrared dipole antennas with tunable thermochromic properties.
  • To achieve large emissivity switching for advanced heat management.

Main Methods:

  • Fabrication of infrared dipole antennas using tunable thermochromic materials, specifically vanadium dioxide.
  • Utilizing non-spherical antenna geometries (rods, stars, flakes) to enhance optical properties.
  • Embedding antennas in polymer films and direct spraying techniques to create free-form composites.

Main Results:

  • Vanadium-dioxide antennas demonstrated a ~200-fold increase in absorption cross-section with rising temperature.
  • Achieved outstanding emissivity switching () in tunable spectral ranges.
  • Created free-form thermoregulation composites through polymer embedding and spraying.

Conclusions:

  • The developed infrared dipole antennas offer a versatile solution for self-adaptive heat management.
  • This technology enables tunable spectral emissivity switching for various applications.
  • Paves the way for advanced coatings, fibers, membranes, and films for radiative cooling, sensing, and camouflage.