Nanowerk  November 2, 2023 Solar-driven evaporation rates using porous absorbers have been reported to exceed the theoretical thermal evaporation limit, but the mechanism of this phenomenon remains unclerogel materials was negligible. 2) Illumination of hydrogel under solar or visible-spectrum light-emitting diode led to evaporation rates exceeding the thermal evaporation limit, even in hydrogels without additional absorbers. 3) The evaporation rates were wavelength dependent, peaking at 520ar. Researchers at MIT found many unexpected results in their experiments: 1) Partially wetted hydrogels became absorbing in the visible spectral range, where the absorption by both the water and the hydrogel material is negligible. […]