A chief complaint about wind
energy is that nobody wants to look at the turbines. A lab out of University
of Texas - Arlington is revolutionizing the concept by creating windmills so
tiny, ten can fit on a single grain of rice. When hundreds of these are put
together, they generate enough electricity to charge a cell phone.
Electrical engineering professor J.C. Chiao and his research
associate Smitha Rao have demonstrated their invention for WinMEMS, a
Taiwanese manufacturing company, who showed immediate interest in its
potential. Mass production will be the key to affordability, and Rao’s
ingenious minimalistic approach uses semiconductors that can self-assemble
into their 3 dimensional conformation, due to principles of origami. The
windmills themselves are made of a flexible nickel alloy, and the fans are a
mere 1.8 mm wide. Using this alloy has produced fans that are incredibly
durable and do not become brittle and break after prolonged exposure to
wind.
The potential for this technology is huge, which led UT
Arlington to file for a patent. However, WinMEMS has a vested interest will
proceed with developing the windmill commercially, though the intellectual
rights lie solely with the university.
In the short term, the team
believes that these windmills can be assembled into a cell phone case to
charge the phone without the need for an outlet. If a phone is needed in an
emergency but it has a dead battery, the phone can be placed into the case
so the wind (either from outside or generated by waving it or blowing on it)
can recharge the battery.
On a larger scale, panels covered with the
fans can be placed on exterior walls or rooftops for a dedicated power
source for larger applications in the home. The potential doesn’t end in the
realm of generating electricity. In the future, the components of these
windmills could also be used to guide micro-robots through surgical
procedures, or a wide variety of other micro-tools and
machines.
Micro-turbines could power
your cellphone 
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