In the last article (http://nanosciencetech.blogspot.com/2010/11/self-powered-nanosensors-based-on-zinc.html) we have discussed about the nano generators basically based on the movement of the zinc oxide nanowires resulting the necessary piezoelectric effect to produce small amount of electricity. This technology can be very much utile in medical sciences, where there is a growing need for the surgery less equipments and supporting technology.
In a recent development, researchers have come up with a technique where they use the freely bendable piezoelectric ceramic thin film nano-materials that can convert tiny movements of the human body (such as heart beats and blood flow) into electrical energy. Thus these devices can be implanted in micro robot which can operate human organs without their battery charged.
The ceramics, containing a perovskite structure, have a high piezoelectric efficiency. Until now, it has been very difficult to use these ceramic materials to fabricate flexible electronic systems due to their brittle property. The research team, however, has succeeded in developing a bio-eco-friendly ceramic thin film nanogenerator that is freely bendable without breakdown.Nanogenerator technology, a power generating system without wires or batteries, combines nanotechnology with piezoelectrics that can be used not only in personal mobile electronics but also in bio-implantable sensors or as an energy source for micro robots. Energy sources in nature (wind, vibration, and sound) and biomechanical forces produced by the human body (heart beats, blood flow, and muscle contraction/relaxation) can infinitely produce nonpolluting energy.
This technology can be used to turn on an LED by slightly modifying circuits and operate touchable flexible displays. In addition, thin film nano-materials have the property of both high efficiency and lead-free bio compatibility, which can be used in future medical applications.
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