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Oct 10, 2017 @ 22:07

Li-Fi to replace Wi-Fi in six years


CHANGCHUN — Chinese scientists have made a breakthrough in creating full-color emissive carbon dots (F-CDs), which brings them one step closer to developing a faster wireless communication channel that could be available in just six years.

Light Fidelity, known as Li-Fi, uses visible light from LED bulbs to transfer data much faster than radio wave-based Wi-Fi.

While most current research uses rare earth materials to provide the light for Li-Fi to transmit data, a team of Chinese scientists has created an alternative — F-CDs, a fluorescent carbon nanomaterial that proves to be safer and faster.

“Many researchers around the world are still working on this. We were the first to successfully create it using cost-effective raw materials such as urea with simple processing,” said Qu Songnan, an associate researcher at Changchun Institute of Optics, Fine Mechanics and Physics, the Chinese Academy of Sciences, which leads the research.

Qu said the rare earth has a long lifespan which reduces the speed of Li-Fi transmission. However, F-CDs enjoy the advantage of faster data transmission speeds.

In previous studies, carbon dots were limited to the emission of lights such as blue and green. The new nanomaterial that Qu’s team has developed can emit all light visible to the human eye, which is a breakthrough in the field of fluorescent carbon nanomaterial.

Qu said this is significant for the development of Li-Fi, which he expects to enter the market in just six years.

A 2015 test by a Chinese government ministry showed that Li-Fi can reach speeds of 50 gigabytes per second, at which a movie download can be completed in just 0.3 seconds. (Xinhua)

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