Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > One electron makes all the difference

Abstract:
A research team from the department of condensed matter physics of the Universidad Autonoma de Madrid working in collaboration with the research group lead by professor Christian Schoenenberger at the Basilea university in Switzerland, have discovered that just an electron sets the conductive properties of a carbon nanotube.

One electron makes all the difference

Madrid, Spain | Posted on February 13th, 2008

Since their discovery in 1991, carbon nanotubes have continually fascinated physicists and chemists with their amazing electronic and mechanical properties.

These cylindrical molecules with a radius of a few Angstroms (110-10 meters) and with lengths of up to several micrometers (110-6 meters) have endless applications inside different scientific fields from nanoelectronics to material science, and are used by scientists to study a wide range of physical phenomena that only take place at a nanometric scale. The combination of nanotubes and other materials form hybrid structures and these are of particular interest. For example, carbon nanotubes connected to superconductive electrodes (materials that offer no electrical resistance at low temperatures) are currently being used to study exotic physical phenomena like the Josephson Effect. This Nobel Prize winning discovery made by physicist Brian D. Josephson in 1973 consists of the almost magic effect of producing an electrical current in a superconductive junction without the application of a voltage.

In the last two three years several research groups have demonstrated that in a carbon nanotube held in between superconducting electrodes, the Josephson effect can be controlled at will, making possible a superconductive version of a transistor. This discovery has endless possibilities, most of which have barely started to be investigated.

A research group from the UAM working in collaboration with a research team lead by Christian Schoenenberger of Basilea University, has recently published an article in the Physical Review Letters, where a new phenomenon that takes place within these nanotube-superconductor structures has been described.

Demonstrating that carbon nanotubes truly are an endless supply of new physical phenomena, they have discovered that when a voltage is applied to these hybrid structures, the electric current that flows depends greatly on the number of electrons that are present at the nanotube, and furthermore, whether this number is even or odd has a drastic impact. This new transport phenomenon is caused by subtle interactions between the Spins (magnetic field produced by the electrons as they rotate) of the electrons in the carbon nanotubes - a characteristic which depends on their number and the conducting electrons in the superconductor.

####

Copyright © Universidad Autonoma de Madrid

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

News and information

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Nanotubes/Buckyballs/Fullerenes

Intertronics introduce new nanoparticle deagglomeration technology March 15th, 2017

Boron atoms stretch out, gain new powers: Rice University simulations demonstrate 1-D material's stiffness, electrical versatility January 26th, 2017

New stem cell technique shows promise for bone repair January 25th, 2017

Captured on video: DNA nanotubes build a bridge between 2 molecular posts: Research may lead to new lines of direct communication with cells January 9th, 2017

Nanoelectronics

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Scientists discover new 'boat' form of promising semiconductor: GeSe Uncommon form attenuates semiconductor's band gap size March 23rd, 2017

UC researchers use gold coating to control luminescence of nanowires: University of Cincinnati physicists manipulate nanowire semiconductors in pursuit of making electronics smaller, faster and cheaper March 17th, 2017

A SOI wafer is a suitable substrate for gallium nitride crystals: Improved characteristics in power electronics and radio applications can be achieved by using a SOI wafer for gallium nitride growth March 4th, 2017

Discoveries

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

A big leap toward tinier lines: Self-assembly technique could lead to long-awaited, simple method for making smaller microchip patterns March 27th, 2017

Announcements

Tiny sensor lays groundwork for precision X-rays detection via endoscopy:Nanoscale fiber-integrated X-ray sensor opens new doors for medical imaging and radiotherapy March 29th, 2017

Researchers uncover secret of nanomaterial that makes harvesting sunlight easier March 29th, 2017

Information storage with a nanoscale twist: Discovery of a novel rotational force inside magnetic vortices makes it easier to design ultrahigh capacity disk drives March 28th, 2017

ATTOPSEMI Technology Joins FDXcelerator Program to Deliver Advanced Non-Volatile Memory IP to GLOBALFOUNDRIES 22 FDX Technology Platform: Leading-edge I-fuse brings higher reliability, smaller cell size and ease of programmability for consumer, automotive, and IoT applications March 27th, 2017

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