Bioinspired Body-Centered Cubic Evaporators: Leveraging Cellular Fluidics for Ultra-Efficient Solar-Driven Water Evaporation via PμSL

We present a bioinspired body-centered cubic evaporator (BCE) that integrates cellular fluidics to achieve unprecedented ultrahigh evaporation flux in solar-driven interfacial evaporation (SDIE). The BCE platform features a three-dimensional cell-based structure fabricated with projection microstereolithography (PμSL) and enhanced with the gold-based photothermal conversion coating. This structure and photothermal conversion coating synergy optimizes water transport, light absorption, and thermal management, resulting in an ultrahigh evaporation flux. The BCE mimics the mechanisms that enhance performance in the tree, where each cell operates both independently and synergistically. Furthermore, the evaporator maintains exceptional structural integrity and stable operation in extreme environments, including natural seawater, acidic and alkaline solutions, and industrial wastewater. These findings position the BCE as a robust and scalable platform for sustainable water desalination and wastewater treatment technologies, contributing significantly to global water security.