Debasmita Banerjee
Debasmita Banerjee
Instrumentation
16 Nov 2016

Lab Grown LED UV-Light To Purify Water In An Instant

One life has taken its first shape in the water naming it the source of life. As we experience, our life cannot sustain without water and certainly, the earth will no longer be called the blue planet if it loses its water resources. Pushing our concerns to the limits, the water scarcity (drinkable) has grown out of its shell as a consequence of rapid industrialization, global warming, and pollution to captivate the world with waterborne diseases and even deaths. Solution? A breakthrough innovation cum approach and mass awareness in combination must win the war against the man-triggered effect. Today, we would feature a research from the Ohio State University which has for the first time fabricated light-emitting diodes (LEDs) on lightweight flexible metal foil that can purify water and sterilize surgical instruments.

nanowires

Referring to an old report, the United Nations Environment Program (UNEP) stated that the twenty percent of the world population which according to an article published in the non-profit waterproject site is 1 billion in only the developing world are living with the lack of safe drinking water. The newest research aimed to cure or minimalize the extent that depends on the foil based LED packets equipped with UV lights.

Currently, UV lamps are used by the military and industries in a variety of subjects ranging from the identification of biological agents to treating plastics. A common example of UV lamps would be the bug zappers in the restaurants. According to Roberto Myers – associate professor of materials science and engineering at Ohio State University believes the primary problem with the deep-UV lamps lied in its size and not-so-flexible structure.

While explaining, Myers implied that to use deep-UV light people bank on the mercury lamps which are not only toxic but bears a heavy structure. LEDs on the flips side have a portable structure and small size to power the needs of having instant pure water. He continued, the deep-UV LED lights aren’t the newest research, still unlike its previous kind these would be cost effective and now they are almost ready to shift from the laboratory to real-world industries.

foil
LED Deep-UV Light Arrangement On Metal Foil

Depending on the last point, Myers’ team has chosen foil based nanotechnology to redesign and wrap the preexisting methods so that nanophotonics could take its position in the world of research and development. Just for a quick reference, the fabrication of the published work is depended on a semiconductor growth technique known as molecular beam epitaxy, where vaporized elemental materials make an ordered configuration on a surface and self-assemble into nanostructures.

Adopting the MBE technique, the team has woven a carpet of tightly packed aluminum gallium nitride wires on titanium and tantalum pieces. Dimension-wise, an individual wire sports a length of 200 nanometers and possesses 20-50 nanometers diameter. In the experiment the nanowires developed on metal foils resembles with the nanowires grown on expensive single-crystal silicon in terms of quality. Next, the researchers are now trying to develop brighter LED-based deep-UV packets on more common metals such as steel and aluminum. The complete research has been recently published in the Applied Physics Letters journal.

Source: OSU

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