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Phones carbon-based approach to
Samsung Galaxy S6
As you may know, mobile phones require a small amount of rare earth elements: gallium, indium and arsenic, which are both scarce and expensive. But what if you could make phones of the most common elements, such as carbon. Because this chemical element does not cease to amaze us .
Researchers are slowly but surely making the inside of the cell phone of carbon (carbon) nanotubes, whose structure resembles a microscopic sheet of chicken wire rolled into a cylinder. Such cylinders can be used as a conductor of electricity and energy storage.
Jakob Wagner and his colleagues from the Technical University of Denmark have found the best way to create carbon nanotubes that can be used as semiconductors, key components of electronic circuits that underlie cell phones and laptops. Carbon nanotubes have both properties of metal and semiconductor, depending on how they collapse.
“The breakthrough is that we are able to control the production of nanotubes and to choose, they are metallic or semiconducting,” – said Wagner. – “This is important because if you want to use them in mobile phones, you need to be sure of the type of nanotubes. In the long term, such semiconductor carbon nanotubes can be a substitute for gallium. ”
The next step will be possible to produce a large number of semiconductor carbon nanotubes that can be inserted into an electronic device, said Wagner. It will not happen tomorrow, but in the next ten years.
But in the IBM researchers like James Hannon are working to set up a laboratory to speed up the process. Hannon said the find Wagner’s an important step, but it is necessary to achieve the production of larger diameter nanotubes.
“From a scientific point of view it is a good demonstration, but from the point of view of logic, this is not applicable,” – said Hannon, manager of the Carbon Electronics IBM. – “I’d like to see if it works this method if you increase the diameter.”
Last year, Hannon and his colleagues at IBM have announced that built a microprocessor and memory chips using carbon nanotubes. The scientist said that problems arose with putting them in a straight line, but IBM has overcome these obstacles by creating a special grooves etched on the surface of the silicon chip and the bonding agent.
Hannon says there are a few problems with carbon nanotubes: figure out how to place them and how to separate the metal from the semiconductor samples that need to be thrown away. A dedicated team of North Carolina State University recently reported that carbon nanotubes are able to integrate into a flexible framework for silicon cells, which work much longer than current lithium-ion batteries.
Hannon expects that carbon nanotubes will play a large role in electronics in the next few years. With these developments phones with a removable stuffing will not be far off.
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Tags: Graphene , Smartphones , Carbon .
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