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Cloud Inspired White and Grey Plasmonic Metasurfaces for Camouflaged Thermal Management
Mhd Adel Assad1, Moheb Abdelaziz1,2, Torge Hartig2
1Nanochemistry and Nanoengineering, School of Chemical Engineering, Department of Chemistry and Materials Science, Aalto University, Espoo, Finland.
Advanced Materials (Deerfield Beach, Fla.)
|June 6, 2025
Summary
New metasurfaces create white and grey plasmonic colors for advanced thermal management. These materials mimic cloud cooling or enhance light absorption for stealth and camouflage applications.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Nature utilizes color-driven thermal regulation.
- Cloud-aerosol interactions influence atmospheric radiative effects.
- Metasurfaces offer tunable optical properties.
Purpose of the Study:
- To design disordered metasurfaces for white and grey plasmonic colors.
- To explore applications in light and thermal management for stealth and camouflage.
- To investigate localized thermal management distinct from traditional passive cooling.
Main Methods:
- Design of disordered metasurfaces.
- Utilizing plasmonic effects for color generation.
- All-in-chamber nanofabrication via sputtering.
Main Results:
- White metasurfaces achieve cloud-like cooling (-10°C) via backscattering.
- Grey metasurfaces enhance light trapping (+10°C) compared to black absorbers.
- Demonstrated low-emissivity properties and visible appearance.
Conclusions:
- Novel approach to localized thermal management using metasurfaces.
- Potential for advanced camouflage, stealth, and thermal energy solutions.
- Scalable, sustainable fabrication with long-term stability.
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