Navigation Links
Stretching molecules yields new understanding of electricity
Date:6/10/2010

Cornell University researchers recently stretched individual molecules and watched electrons flow through them, proving that single-molecule devices can be used as powerful new tools for nanoscale science experiments.

The finding, reported in the June 11 issue of the journal Science, probes the effects of strong electron interactions that can be important when shrinking electronics to their ultimate small size limit--single-molecule devices. The work resulted in the first precision tests of a phenomenon known as the underscreened Kondo effect.

"The main advance in our work is that we show single-molecule devices can be very useful as scientific tools to study an interesting phenomenon that has never before been experimentally accessible," said Dan Ralph, the Cornell physics professor who led the study.

The research was funded in part by the Cornell Center for Materials Research, which is supported by the National Science Foundation's (NSF) Division of Materials Research. NSF's Division of Chemistry also contributed to the project.

"Single-molecule devices can indeed be used as model systems for making detailed quantitative studies of fundamental physics inaccessible by any other technique," said first author Joshua Parks, a postdoctoral associate in Cornell's Department of Chemistry and Chemical Biology.

Using a cobalt-based complex cooled to extremely low temperatures, Ralph, Parks and an international team of researchers watched electrons move through single molecules and accomplished a feat that until now escaped chemists and physicists. They were able to study the resistance of the flow of electricity within a system's electric field as the temperature approaches absolute zero.

This is known as the Kondo effect.

In physics, the Kondo effect is perhaps the most important model for understanding how electrons interact within a system such as a molecule. Because of the Kondo effect, when a s
'/>"/>

Contact: Bobbie Mixon
bmixon@nsf.gov
703-292-8485
National Science Foundation
Source:Eurekalert

Page: 1 2

Related biology news :

1. Scripps Research scientists break barrier to creating potential therapeutic molecules
2. New method for producing libraries of important carbohydrate molecules
3. Intracellular express -- why transport protein molecules have brakes
4. Light activated warhead turns modest molecules into super protein killers
5. New sensor array detects single molecules for the first time
6. New cancer-fighting strategy focuses on signaling molecules
7. When molecules leave tire tracks
8. Research at Marshall University may lead to new ways to transport and manipulate molecules
9. Small molecules found to protect cells in multiple models of Parkinsons disease
10. Just like old times: Generating RNA molecules in water
11. New synthetic molecules trigger immune response to HIV and prostate cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... Ill. , July 9, 2014 ... (EHR), spurred in large part by meaningful use ... health care providers interact with laboratory information. Now, ... in the field of clinical informatics in order ... To address the educational needs of ...
(Date:7/10/2014)... German . An ... a central step of photosynthesis in action for the first ... State University used the world,s most powerful X-ray flashlight at ... of a molecular complex called photosystem II as it splits ... oxygen in earth,s atmosphere. The researchers report their results in ...
(Date:7/10/2014)... megacity, teeming with life too small to be seen. ... bacteria can be found. Now scientists have discovered ... daily cyclesnot unlike the residents of a bustling city ... at the same times., What,s more, it,s not all ... to help them photosynthesize food from inorganic substanceshave been ...
Breaking Biology News(10 mins):New Clinical Informatics Curriculum Prepares Future Pathologists 2New Clinical Informatics Curriculum Prepares Future Pathologists 3New Clinical Informatics Curriculum Prepares Future Pathologists 4Scientists watch photosynthesis in action 2Scientists watch photosynthesis in action 3New research finds ocean's most abundant organisms have clear daily cycles 2New research finds ocean's most abundant organisms have clear daily cycles 3
... could lead to new asthma drugs, scientists at Yale School ... of California, San Francisco have discovered that a protein may ... demonstrated how a drug known to reduce inflammatory and neuropathic ... is published in the May 18-22 online Early Edition of ...
... project that aims to produce hydrogen on an environmentally ... sun has won a prestigious E.ON research award. ... abundant and renewable sources sunlight, biomass and water. ... degradation of organic compounds avoiding the use of energy ...
... cases of malaria are diagnosed each year mostly in ... malaria do exist, the demand for new treatments is ... developed a resistance to existing medications. Now, researchers ... discovered one way to stop malaria parasite growth, and ...
Cached Biology News:Yale team identifies key to potential new treatment for allergy-induced asthma 2Accolade for solar-hydrogen project 2New lead on malaria treatment 2
(Date:1/15/2014)... approach akin to assembling a club sandwich at ... (NIST) researchers have succeeded in crafting a uniform, ... of foam commonly used in upholstered furniture and ... nanotube-coated polyurethane foam was reduced 35 percent compared ...
(Date:1/15/2014)... The Pittcon Organizing Committee is pleased to announce that Innovative ... e-Journal and producer of Food Labs Conference , ... the co-location of Food Labs Conference to be held in ... fee to attend the two-day Food Lab Conference, March 4-5. ...
(Date:1/15/2014)... Cynvenio, a cancer diagnostics company focused on ... of tumor cells in the bloodstream, today announced that ... support application powered by CollabRx, Inc. , Available ... Therapy Finder will provide breast cancer patients and their ...
(Date:1/15/2014)... This webinar will focus on EMA and ... in biosimilars. , Regulatory frameworks are evolving many countries ... the complex nature of biopharmaceuticals makes the demonstration of ... challenging. Based on the specific aspects of biosimilar drug ...
Breaking Biology Technology:Layered security: Carbon nanotubes promise improved flame-resistant coating 2Pittcon Announces Second Year Partnership With Food Safety Tech 2Pittcon Announces Second Year Partnership With Food Safety Tech 3Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2
... Calif., Dec. 21 2010 El Camino Hospital today ... U.S. Clinical Trial. El Camino Hospital is one of ... participate in the trial, which is evaluating a revolutionary ... surgery for patients with severe aortic stenosis. ...
... 2010 Exagen Diagnostics, Inc., a specialty diagnostics laboratory ... that it has been awarded $400,000 in funding under ... was created by Congress as part of the Patient ... the grants will be used to advance the development ...
... James M. Golubieski, president of Foundation Venture Capital Group, ... that Snowdon Inc., a company in which FVCG has ... Department of Defense (DoD) Program, Transformational Medical Technologies (TMT). ... Agency (DTRA) contract, Snowdon may receive up to $8.2 ...
Cached Biology Technology:El Camino Hospital Announces First Implant in Clinical Trial to Evaluate Revolutionary Heart Valve Procedure 2El Camino Hospital Announces First Implant in Clinical Trial to Evaluate Revolutionary Heart Valve Procedure 3Exagen Diagnostics Awarded $400,000 in Grants Under the QTDP Program 2Foundation Venture Capital Group Company Receives $8.2 Million DoD Contract 2Foundation Venture Capital Group Company Receives $8.2 Million DoD Contract 3
... Concentrators set the standard for sample concentration and ... large chamber uses a combination of centrifugal force, ... a single run. , SC210A comes equipped with:, ... long lasting chemical compatibility ...
Digital display of time, vacuum and temperature , Dual vacuum control of ramping rate and ultimate level , Comes complete with RH40-12 (40 x 1.5 ml) Rotor and (2) Glass Condensation Flasks. ...
... Jouan RC10 series of vacuum concentrators/centrifugal evaporators ... features allied to rapid and safe concentration ... be combined with oil-free or high vacuum ... a wide selection of rotors (eliminating sample ...
... George Paxinos Affiliation: School of Psychology, The University ... Affiliation: Curtin University of Technology, Perth, Australia This ... of the rat brain. It is a ... revison and extension of the compact 3rd edition. ...
Biology Products: