Hydrogel

Wetness collected from the atmosphere at night by a hydrogel can be utilized to cool photovoltaic panels throughout the day, improving their efficiency. So claim scientists at the King Abdullah University of Science as well as Technology (KAUST) in Saudi Arabia as well as the Hong Kong Polytechnic University (PolyU) that made the hydrogel from a mix of carbon nanotubes in polymers with a hygroscopic calcium chloride salt. The technology could be an environmentally-friendly method to increase photovoltaic or pv electricity generation and also cool down other gadgets.