Only the light generated by the light bulb atom thick to have much in the end?

CnBeta network, 130 years ago, Thomas Edison made the world's first commercial carbon filament.

Now, from the Columbia University, Seoul National University (SNU), the research team and the Korean standard Science Research Institute, has been in the form of perfect crystallization of the same elements - carbon (Shi Moxi) - made the world's thinnest light bulb.

Although it is only one atom thick filament, but it produces light can still easily be seen with the naked eye.

Young Duck Kim and James Hone professor.

The graphene micro filament attached to the metal electrode, and then hung on the silicon substrate, and the current through the filament is heated to above 2500 degrees Celsius (4500 degrees Fahrenheit), which issued a very bright light.

The researchers used graphene produced the world's thinnest sheet type light source.

Columbia University mechanical engineering professor James Hone said:

"We have created the world's thinnest bulb, this new" broadband "light source can be integrated into the chip, and to achieve thin flexible transparent display, and pave the way for atom chip communication based on graphene".

Interestingly, although graphene temperature is so high, but will not melt substrate or metal electrode. This is because, when the graphene is heated, its heat can't from itself to leave.

The heat is concentrated and is limited in the very middle of the filament, and a light. The spectral measurement shows that the peak exceeded expectations, this is because the light emitting filament and the silicon substrate interference caused by the rebound.

Different from any common filament, because the material is transparent, so this phenomenon can occur only on graphene. Through the change of substrate distance, the researchers were able to adjust its emission spectrum.

The graphene lattice (graphene lattice) can be very efficient light, because of its inherent power can maintain the excited levels, and allow the free flow of electrons.

That is to say, as graphene could rise in the state (elevated state) fast electron emission, it can also effectively release photons in electric heating conditions.

KRISS senior researcher Myung-Ho Bae said:

At the highest temperature, the electron temperature is much higher than the acoustic vibration mode of the graphene lattice. The thermal characteristics of this unique, we will allow the suspension of graphene is heated to the sun half temperature, and with respect to the solid substrate to enhance the efficiency of 1000 times.

At present, researchers are trying to improve the thermal device, so that it can be fast on / off (0 and 1 signal) and application in optical communication. Of course, they will be included in the exploration method of flexible material.

The results of this research to the recently published in Nature Nanotechnology "(Nature Nanotechnology) journal.

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