Imagine a light bulb made somewhat thinner than paper, but stronger than any other material known to man. It seems impossible, but it is not; a group of scientists from Columbia University, the National University of Seoul and the Korea Research Institute of Standards and Science announced Monday that it successfully developed a bulb made of graphene.
Graphene is a material that is only as thick as an atom, but hard as a diamond. In fact, graphene is considered the world's strongest material.
While the use of graphene to develop bulbs is something very modern, scientists are getting closer to it using old techniques. They put the electric currents through graphene strips attached to metal electrodes, and suspended on the substrate; this makes graphene calentiente and produce light.
It is the same as the filament glowing in traditional incandescent bulbs, except that on a microscopic scale.
Which is not microscopic, however, the filament light produces graphene: heated to about the same temperature as incandescent filament, which are 4,532 degrees Fahrenheit (2,500 degrees Celsius, and produces light that can be seen for the blind spots of the eye. However, scientists discovered that heat is concentrated in a small section of graphene, because it is a poor conductor of heat at these temperatures.
What's more, the color of the light can be changed by altering the distance between the filament and the substrate.
Duck Young Kim, a research scientist at Columbia and team leader, said he discovered the light emissive properties of graphene four years ago. He said that this finding surprised the others who took that graphene does not emit light, because it is not a semiconductor, for example, an LED it is.
Kim and his team provide many uses for this technology in the near future. For example, you could use in Optical Network, trying to do with light and what is done with electrodes on semiconductors. The filament heating properties graphene make it an optimal solution for this application, and Kim said that this process could be more common in about 10 years.
While the use of graphene to develop bulbs is something very modern, scientists are getting closer to it using old techniques. They put the electric currents through graphene strips attached to metal electrodes, and suspended on the substrate; this makes graphene calentiente and produce light.
It is the same as the filament glowing in traditional incandescent bulbs, except that on a microscopic scale.
Which is not microscopic, however, the filament light produces graphene: heated to about the same temperature as incandescent filament, which are 4,532 degrees Fahrenheit (2,500 degrees Celsius, and produces light that can be seen for the blind spots of the eye. However, scientists discovered that heat is concentrated in a small section of graphene, because it is a poor conductor of heat at these temperatures.
What's more, the color of the light can be changed by altering the distance between the filament and the substrate.
Duck Young Kim, a research scientist at Columbia and team leader, said he discovered the light emissive properties of graphene four years ago. He said that this finding surprised the others who took that graphene does not emit light, because it is not a semiconductor, for example, an LED it is.
Kim and his team provide many uses for this technology in the near future. For example, you could use in Optical Network, trying to do with light and what is done with electrodes on semiconductors. The filament heating properties graphene make it an optimal solution for this application, and Kim said that this process could be more common in about 10 years.
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