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Related Experiment Video

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Transparent Metamaterial Films with Multimodal Radiative Cooling for Outdoor Flexible Electronic Devices.

Yawen Gong1,2, Zhao Wang1,2, Tong Wang1,2

  • 1School of Artificial Intelligence Science and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China.

ACS Applied Materials & Interfaces
|April 28, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a transparent radiative cooling film for flexible electronics. The novel film enhances thermal management, reducing device temperature by 14.8 °C while maintaining optical clarity.

Keywords:
durabilitymultimodal radiative coolingoutdoor electronic devicesuperhydrophobicthermal conductivitytransparent radiative cooling

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Thermal Engineering

Background:

  • Effective thermal management is crucial for high-power flexible electronics, with passive radiative cooling offering a sustainable solution.
  • Integrating thermal management with optical transparency in electronic displays remains a significant challenge.
  • Existing methods often struggle to balance heat dissipation, radiation, and convection without compromising device aesthetics and function.

Purpose of the Study:

  • To design and fabricate a multimodal transparent radiative cooling film for advanced electronic devices.
  • To achieve efficient passive cooling, high optical transparency, and environmental durability.
  • To demonstrate the film's effectiveness in reducing the operating temperature of flexible electronics.

Main Methods:

  • Fabrication of a composite film by embedding diamond microparticles in a poly(dimethylsiloxane) elastomer matrix (PDMS/D-PA).
  • Surface patterning with a pyramidal micronano array to enhance radiative properties.
  • Surface modification via alkylation treatment to achieve superhydrophobicity.

Main Results:

  • The optimized film achieved 81.8% solar spectral transmittance and 98% mid-infrared emissivity.
  • Enhanced thermal conductivity of 3.33 W m-1 K-1 was recorded.
  • A temperature reduction of 14.8 °C was observed in outdoor tests under solar irradiance.

Conclusions:

  • The developed transparent radiative cooling film offers a sustainable passive thermal management solution for flexible electronics.
  • The film's properties address the need for both aesthetic and functional requirements in outdoor electronic devices.
  • This technology enhances the reliability and longevity of devices like wearable sensors, foldable displays, and e-skin.