Columbia engineers develop pigment-free coating that kept surfaces 6°C cooler under Arizona sun
Source: Times of India
Category: Technology
Region: General
Published: August 26, 2026 at 08:30
📝 Summary
Columbia Engineering researchers developed a porous polymer coating that can cool surfaces below the surrounding air temperature without using electricity. The coating replaces conventional white pigments with nano-to-microscale air voids that reflect sunlight and release heat towards the sky. Tests showed the surface stayed about 6°C below ambient temperature in Arizona and 3°C below it in Bangladesh.