Nanotechnology Now





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > In touch with molecules

Electron current through two C60-molecules which are contacted with elec-trodes. As they are only one billionth of a meter in diameter, ultra high precision is needed in order to control their distance. 
Copyright: CAU, Source: prl.aps.org
Electron current through two C60-molecules which are contacted with elec-trodes. As they are only one billionth of a meter in diameter, ultra high precision is needed in order to control their distance. Copyright: CAU, Source: prl.aps.org

Abstract:
The performance of modern electronics increases steadily on a fast pace thanks to the ongoing miniaturization of the utilized components. However, severe problems arise due to quantum-mechanical phenomena when conventional structures are simply made smaller and reach the nanometer scale. Therefore current research focuses on the so-called bottom-up approach: the engineering of functional structures with the smallest possible building blocks - single atoms and molecules.

In touch with molecules

Kiel, Germany | Posted on November 12th, 2009

For the first time a collaboration of researchers across Europe now achieved to investigate the electrical behaviour of only two C60 molecules touching each other. The molecule which is shaped like a football was discovered in 1985 and since then has attracted tremendous attention by researchers all over the world due to its unique chemistry and potential technological applications in nanotechnology, materials science and electronics.

The findings of the researchers from institutes in Germany, France, Spain and Denmark were published in the latest issue of the prestigious magazine Physical Review Letters. A scanning tunnelling microscope (STM) was used to construct an ultra small electrical circuit comprised of only two C60 molecules, each just 1 nanometer in diameter. The researchers first picked up a single C60 molecule with the STM tip and thereafter approached a second molecule with a precision of a few trillionths of meters. During this controlled approach the physicists were able to measure the electrical current that flows between the two molecules. Understanding this current, which depends critically on the distance between the molecules, is important for utilizing molecules in future electronics.

The investigation revealed that the electrical current does not flow easily between the two touching C60 molecules - the conductance is 100 times smaller than for a single molecule. This finding is crucial for future devices with closely packed molecules as it indicates that leakage currents between neighbouring circuits will be controllable.

These experimental findings are strongly supported by quantum-mechanical calculations which too come to the result of poor electrical conductivity between two C60 molecules.

The extreme precision of manipulation and control of single molecules pre-sented in this work open up a new route for exploring other promising mole-cules. The deeper understanding of electrical current on the nanometer scale is an essential step towards novel molecular nanoelectronics.

###

The published article is available at: www.uni-kiel.de/download/pm/2009/2009-114-molekuele.pdf

####

About Kiel University
The University of Kiel (German Christian-Albrechts-Universität zu Kiel, CAU) is a university in the city of Kiel, Germany. It was founded in 1665 as the Academia Holsatorum Chiloniensis by Christian Albert, Duke of Holstein-Gottorp and has approximately 23,000 students today. The University of Kiel is the largest, oldest, and most prestigious in the state of Schleswig-Holstein.

From Wikipedia, the free encyclopedia

For more information, please click here

Contacts:
Prof. Dr. Richard Berndt
Institut für Experimentelle und Angewandte Physik
Christian-Albrechts-Universität, D-24098 Kiel
Phone: +49 431 8803946


Dr. Guillaume Schull
Pressent Address: Institut de Physique et de Chimie de Strasbourg
Universite Louis Pasteur
CNRS UMR 7504, F-67034 Strasbourg
Phone: +33 388 107 172

Copyright © Eurekalert

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

Discovery of nanotubes offers new clues about cell-to-cell communication July 2nd, 2015

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

Chip Technology

The quantum middle man July 2nd, 2015

New technology using silver may hold key to electronics advances July 2nd, 2015

Influential Interfaces Lead to Advances in Organic Spintronics July 1st, 2015

Emergence of a 'devil's staircase' in a spin-valve system July 1st, 2015

Nanoelectronics

New technology using silver may hold key to electronics advances July 2nd, 2015

Exagan Raises €5.7 Million to Produce High-efficiency GaN-on-Silicon Power-switching Devices on 200mm Wafers: Leti-and-Soitec Spinout Focused on Becoming Leading European Source Of GaN Devices for Solar, Automotive, Telecoms and Infrastructure June 25th, 2015

Nanowires could be the LEDs of the future June 25th, 2015

Leti to Present Solutions to New Applications Using 3D Technologies at SEMICON West LetiDay Event, July 14: Leti Experts also Will Speak at TechXPOT Session on MEMS and STS Session on Lithography Cost-and-Productivity Issues Below 14nm June 22nd, 2015

Announcements

Nanospiked bacteria are the brightest hard X-ray emitters July 2nd, 2015

Engineering the world’s smallest nanocrystal July 2nd, 2015

Producing spin-entangled electrons July 2nd, 2015

NIST Group Maps Distribution of Carbon Nanotubes in Composite Materials July 2nd, 2015

Quantum nanoscience

Freezing single atoms to absolute zero with microwaves brings quantum technology closer: Atoms frozen to absolute zero using microwaves July 2nd, 2015

The quantum spin Hall effect is a fundamental property of light June 25th, 2015

Lancaster University revolutionary quantum technology research receives funding boost June 22nd, 2015

UAB researchers design the most precise quantum thermometer to date: The device would be capable of measuring the temperature of a cell's interior June 7th, 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