Carbonics’ major step forward involved single-walled carbon nanotubes (SWCNTs). Most importantly, they were able to successfully deposit this carbon nanotube variety onto mainstream substrates that are the backbone of today’s electronics industry. These substrates include silicon, silicon-on-insulator (SOI) and quartz. They can even be melded onto flexible materials, which is another very hot new electronic modality recently commercialized.

Finally, if a single sheet of graphene is “rolled” into a tube, the result is a carbon nanotube. Oftentimes, one or both ends the tube is “capped” with one half, or a hemisphere, of the buckyball structure, described earlier. There can be either single wall or multi-wall carbon nanotubes. The latter can be thought of as tubes within a tube. The illustration below is a representation of an uncapped double-walled nanotube.

• Use a separate GaAs chip for the high-speed subsections of a product. This takes up space, requires interconnections, leaves room for error and makes manufacturing more difficult.

Originally, carbon nanotube structures were renowned for their strength. That strength comes partially from their structure, the way each atom held in place by three others. The other source of strength is the solid covalent chemical bonds between each atom in the structure. It is also to be noted that they are unusually good conductors of electricity.

7 Things To Consider About Nanotubes In Electronics

16-12-2019 |   |  By Gary Elinoff

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Carbon nanotubes have been the “technology of the future” since the days of the Buckyball in 1985. With the demonstration of a field-effect transistor made of carbon nanotubes that can operate in the 100 GHz range, that future is now. The technology has “graduated” from university labs. It now is being pursued by industrial corporations and the military, who are interested in short-term results, and not long-range possibilities. But first, a bit of background.

Graphene. 

• Don’t use GaAs, and instead employ CMOS, which is not as good at superfast speeds as GaAs

Especially now, with the advent of 5G, the name of the game in electronics to today is speed. Even somewhat beyond 5G, there is a need to operate the superfast speeds ranging from 30 to 300 gigahertz (GHz), aka the millimetre wavelength area. The fastest semiconductors available today are made from gallium arsenide (GaAs). But there is a major problem with GaAs technology. And that is, that it is hard to “bond”, or deposit GaAs to silicon substrates, which are the major building blocks for semiconductors. This has led to two separate sub-optimal solutions

3- What are Carbon Nanotubes?

Image source: BusinessWire

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By Gary Elinoff