Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > IBM Scientists Create Method to Measure the Performance of Carbon Nanotubes as Building Blocks for Ultra Tiny Computer Chips of the Future

Vibrations give color to light allowing us to locally measure charges in a nanoscale electronic device.
Vibrations give color to light allowing us to locally measure charges in a nanoscale electronic device.

Abstract:
Observing Vibration and Light at the Nanoscale to Advance the Use of Carbon Nanotubes as Semiconductors and Metal Wires Inside Chips

IBM Scientists Create Method to Measure the Performance of Carbon Nanotubes as Building Blocks for Ultra Tiny Computer Chips of the Future

YORKTOWN HEIGHTS, NY | Posted on October 14th, 2007

IBM (NYSE: IBM) scientists today announced that they have measured the distribution of electrical charges in tubes of carbon that measure less than 2 nanometers in diameter, 50,000 times thinner than a strand of human hair.

This novel technique, which relies on the interactions between electrons and phonons, provides a detailed understanding of the electrical behavior of carbon nanotubes, a material that shows promise as a building block for much smaller, faster and lower power computer chips compared to today's conventional silicon transistors.

Phonons are the atomic vibrations that occur inside material, and can determine the material's thermal and electrical conductivity. Electrons carry and produce the current. Both are important features of materials that can be used to carry electrical signals and perform computations.

The interaction between electrons and phonons can release heat and impede electrical flow inside computer chips. By understanding the interaction of electrons and phonons in carbon nanotubes, the researchers have developed a better way to measure their suitability as wires and semiconductors inside of future computer chips.

In order to make carbon nanotubes useful in building logic circuitry, scientists are pushing to demonstrate their high speed, high packing density and low power consumption capabilities as well as the ability to make them viable for potential mass production.

"The success of nanoelectronics will largely depend on the ability to prepare well characterized and reproducible nano-structures, such as carbon nanotubes," said Dr. Phaedon Avouris, IBM Fellow and lead researcher for IBM's carbon nanotube efforts. "Using this technique, we are now able to see and understand the local electronic behavior of individual carbon nanotubes."

To date, researchers have been able to build carbon nanotube transistors with superior performance, but have been challenged with reproducibility issues. Carbon nanotubes are sensitive to environmental influences. For example, their properties can be altered by foreign substances, affecting the flow of electrical current and changing device performance. These interactions are typically local and change the density of electrons in the various devices of an integrated circuit, and even along a single nanotube.

A better understanding of how the local environment affects the electrical charge of a carbon nanotube is needed to allow the fabrication of more reliable transistors. Therefore, the ability to measure local electron density changes in a nanotube is essential. A team of researchers from the IBM's T.J. Watson Research Center in Yorktown Heights have just solved this problem.

This achievement was published online October 14, 2007 in the journal Nature Nanotechnology. The team monitored the color of the light scattered from the nanotube (Raman Effect), and measured small changes in the color of the light corresponding to changes in the electron density in the nanotube. The technique takes advantage of the interaction between the motion of the atoms and the motion of the electrons, so that electron density changes can be reflected in changes of the frequency of the vibrational motion of the nanotube atoms.

In March 2006, IBM announced that its researchers built the first complete electronic integrated circuit around a single carbon nanotube molecule.

For more information about IBM Research, visit http://www.research.ibm.com/ .

####

For more information, please click here

Contacts:
Lizette Kodama
IBM Media Relations
914-945-2703

Copyright © Market Wire

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

Chip Technology

Creating new materials with quantum effects for electronics January 29th, 2015

Advantest to Exhibit at SEMICON Korea in Seoul, South Korea February 4-6 Showcasing Broad Portfolio of Semiconductor Products, Technologies and Solutions January 29th, 2015

Researchers Make Magnetic Graphene: UC Riverside research could lead to new multi-functional electronic devices January 27th, 2015

Nanometrics to Present at the Stifel 2015 Technology, Internet and Media Conference January 27th, 2015

Nanotubes/Buckyballs

Chromium-centered cycloparaphenylene rings for making functionalized nanocarbons January 26th, 2015

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

Carbon nanotube finding could lead to flexible electronics with longer battery life January 14th, 2015

Discoveries

New method allows for greater variation in band gap tunability: The method can change a material's electronic band gap by up to 200 percent January 31st, 2015

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

DNA nanoswitches reveal how life's molecules connect: An accessible new way to study molecular interactions could lower cost and time associated with discovering new drugs January 30th, 2015

Announcements

New method allows for greater variation in band gap tunability: The method can change a material's electronic band gap by up to 200 percent January 31st, 2015

Evidence mounts for quantum criticality theory: Findings bolster theory that quantum fluctuations drive strange electronic phenomena January 30th, 2015

Everything You Need To Know About Nanopesticides January 30th, 2015

DNA nanoswitches reveal how life's molecules connect: An accessible new way to study molecular interactions could lower cost and time associated with discovering new drugs January 30th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE