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Novel LEDs proven as better way to clean water in Remote areas

By Parul Gupta

The scientists describe how they created the LEDs to glitter in the high-energy ‘deep’ end of the UV spectrum. The university will certify the technology to industry for further enhancement. Deep UV light is primarily used by the humanitarian, military organizations and industry for applications varying from identification of biological agents to rectify plastics, says Roberto Myers, an associate lecturer of materials engineering and science at Ohio State.

Use of LEDs to clean water

The issue if that traditional deep-UV lamp is too bulky to conveniently carry around. “Presently, if you wish to prepare deep ultraviolet light, you have obtained to utilize mercury lamps,” says Myers, who is also an associate lecturer of computer and electrical engineering. “Mercury is toxic and those lamps are electrically ineffective and bulky. LEDs are truly effective, so if we could prepare UB LEDs that are portable, cheap and safe, we could create safe drinking water wherever we require it.”

He stated that the other research groups have engineered deep-UV LEDs at the laboratory scale, however only by utilizing extremely rigid, pure single-crystal semiconductors as substrates – a strategy that levies a huge cost barrier for industry. Foil-based nanotechnology could allow large-scale production of a cheaper, lighter and more eco-friendly deep-UV LED.

But materials and Myers science doctoral student Brelon J. May expect that their technology will carry something more – alter a niche research field known as nanophotonics into a feasible industry. “Individual always says that nanophotonics will never be commercially vital, as you cannot scale them up. Well, now we may. We can create a sheet of them if we intend,” says Myers. “That implies we can consider nanophotonics for big-scale manufacturing.”

Such novel development relies on a well-established semiconductor progress technique known as molecular beam epitaxy, wherein vaporized elemental substances settle on a surface and self-organize into layers of nanostructures. The Ohio State scientists utilized this method to grow a carpet of tightly packed aluminium gallium nitride wires on elements of metal foil like tantanium and titanium.

The individual wires estimate about 200 nanometres tall and around 20 – 50 nanometres in diameter – couples of times narrower than a human hair and hidden to the naked eye.

Conclusion

In the laboratory tests, the nanowires grown on metal foils lit up closely as illuminating as those structured on the more costly and less flexible singular – crystal silicon. The scientists are focusing right now to create the nanowire LEDs even more illuminating and will also attempt to grow the wires on foils prepared from common metals, comprising aluminium and steel. At present, the scientists have prepared light releasing diodes on extremely light weight metal foil and these LEDs are ideal for ultraviolet lights that soldiers can use for purifying water.


Filed Under: News

 

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