c832be2d_Facts_and_figures___SciDev_Net__Product
[How it works] A combination of polymers and glass nanoparticles that can be printed onto surfaces like fabrics to soak up water [Importance] Rainwater harvesting is increasingly important to countries like China, Nepal and Thailand. The nanosponge is much more efficient than traditional mist-catching nets [Developer] Massachusetts Institute of Technology, United States [Product] 
Nanosponge for rainwater harvesting
Nanotechnology for clean water: Facts and figures - SciDev.Net