Composite number

Engineering

Nanocellulose

Diffuser (optics)

Radiative cooling

Materials science

Cellulose

Metamaterial

Chemical engineering

Radiative transfer

Thermodynamics

Physics

Nanotechnology

Diffusion

Optics

Thermal

Transmittance

Composite material

Light source

Optoelectronics

Journal of Materials Chemistry C

We embedded IR-resonant microparticles as visible scatterers and thermal emitters in a transparent nanocellulose composite, to form a metamaterial that provides radiative cooling while simultaneously functioning as an optical diffuser.

Transparent nanocellulose metamaterial enables controlled optical diffusion and radiative cooling