Water Droplets Can Power Your Smartphone

Washington: Imagine if the humidity in the air could power your smartphone or laptop. It may soon become a reality!

Water droplets jumping from a highly repelling surface can be harnessed to produce electricity that could be used to power electronic devices, MIT scientists have found. Last year, researchers discovered that when water droplets spontaneously jump away from superhydrophobic surfaces during condensation, they can gain electric charge in the process.

Now, the same team has demonstrated that this process can generate small amounts of electricity that might be used to power electronic devices. The approach developed by Nenad Miljkovic, Evelyn Wang from Massachusetts Institute of Technology (MIT) and colleagues could lead to devices to charge cell phones or other electronics using just the humidity in the air. As a side benefit, the system could also produce clean water.
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