Researchers claim photoluminescent aerogel has a visible light reflectance of 104%

https://phys.org/news/2024-07-photoluminescent-aerogel-visible.html

"polymeric passive radiative cooling aerogel from biomass... reflects more light than receives due to photoluminescence where molecules absorb visible light, exciting their electrons to higher state resulting in light emission... added freeze-dried salmon sperm DNA to gelatin. allowed to sublimate, leaving behind highly compressed layered aerogel, held together via hydrogen bonds between DNA's phosphates/ gelatin's amino acids, water added so sticks to surface/ self-heals... cools to 16°C below ambient"

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