Succeeded in developing transistor made of carbon nanotube with higher speed and energy saving than silicon

The "next generation semiconductor material"carbon nanotubeResearchers in the United States succeeded in producing transistors made of carbon nanotube with higher speed and energy saving than silicon transistors.

Quasi-ballistic carbon nanotube array transistors with current density exceeding Si and GaAs | Science Advances
http://advances.sciencemag.org/content/2/9/e1601240

For first time, carbon nanotube transistors outperform silicon
http://news.wisc.edu/for-first-time-carbon-nanotube-transistors-outperform-silicon/

For carbon nanotube transistors with performance better than silicon transistors manufactured by researchers at the University of Wisconsin Madison can be confirmed with the following movie.

Carbon nanotube transistors outperform silicon for first time ever - YouTube


Carbon nanotube is a straw shaped (tubular) material with carbon atoms forming a regular hexagon, which is a tremendously small structure.


Therefore, even if several trillions of carbon nanotubes are gathered, only this is collected in the cylinder.


However, since carbon nanotubes have higher electrical conductivity than any materials discovered so far, they are also expected to be the next semiconductor material for silicon.


Although carbon nanotube-made semiconductors have been produced for more than 20 years, finally researchers at the University of Wisconsin-Madison are using carbon nanotubesA transistorSucceeded in the production of.


Most modern electronic devices use semiconductors made of silicon materials.


However, in theory it is known that carbon nanotube semiconductors have the performance to overwhelm silicon semiconductors.


Since carbon nanotube semiconductors operate faster than silicon semiconductors and are more power saving, research is continuing as a promising candidate for post-silicon semiconductors.


This is a carbon nanotube transistor manufactured by Associate Professor Michael Arnold of the University of Wisconsin-Madison. We succeeded in fabricating transistors by establishing technology to remove defective carbon nanotubes with metallic properties by impurities contained in carbon nanotubes by about 0.01% and establishing polymer technology to selectively arrange carbon nanotubes .


Associate Professor Arnold's team made a carbon nanotube transistor by stacking carbon nanotubes of 1 inch (about 2.5 centimeters) square. In the experiment, we realized 1.9 times current density tolerance compared with silicon transistor of the same size. As a result, it is predicted that carbon nanotube transistors with about 2 times the structural stability of silicon can operate at 5 times faster and 5 times lower power consumption than silicon, even when flowing a high density current doing. In addition, because carbon nanotube-made transistors are extremely small, they can change electrical signals at high speed, so research teams can improve the bandwidth of wireless communication.

Associate Professor Arnold said, "Carbon nanotubes have traditionally been a hype to say as" hype "because of their characteristics but have not been put into practical use and have been disappointed by many people, Nanotube 'hype' thinks natural as it thinks about its potential performance. "In the future, he will work on the development of a manufacturing method that can commercialize carbon nanotube deposition process for commercial use.