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:9/18/2014)... The ability to acquire and creatively manipulate spoken language ... over the past 6 million years of human evolution ... is the best candidate gene we now have," says ... LMU. In his efforts to understand the molecular biological ... step forward. The results of his latest study, undertaken ...
(Date:9/18/2014)... have built the first smartphone app that automatically ... trends. In other words, your smartphone knows your ... -- and how that affects you. , The ... and loneliness to their academic performance, also may ... example, to monitor mental health, trigger intervention and ...
(Date:9/18/2014)... Va.Sept. 18, 2014Many Americans across racial and ethnic ... greatest impact on their day-to-day life, more so ... hearing and speech (57% of African-Americans, 49% of ... Hispanics). When asked which disease or ailment is ... ranked first among African-Americans followed by AIDS/HIV. ...
Breaking Biology News(10 mins):Language evolution: Quicker on the uptake 2Language evolution: Quicker on the uptake 3New Dartmouth smartphone app reveals users' mental health, performance, behavior 2New Dartmouth smartphone app reveals users' mental health, performance, behavior 3New Dartmouth smartphone app reveals users' mental health, performance, behavior 4Americans rate losing eyesight as having greatest impact on their lives 2Americans rate losing eyesight as having greatest impact on their lives 3
... the world go ,round they comprise most of the Earth,s ... that keep the planet, and life in and on it, going. ... is the carbon cycle, which is currently unbalanced. Humans release more ... Deal with Carbon: How Earth,s Mighty Microbes Respond," is a free ...
... May 6, 2011 Cancer researchers at UT Southwestern ... telomerase enzyme, which is linked to the disease,s growth. ... demonstrate that telomerase repairs chromosomes in one of two ways ... if the cell is under stress from enzyme inhibition ...
... Scientists have known for years that seizures in patients ... they did not know was why this was happening. ... by Professor Wilma Friedman of the Department of Biological Sciences ... a recently awarded, four-year, $2 million grant from the National ...
Cached Biology News:UT Southwestern research reveals how cancer-driving enzyme works 2Following trail of cell death in epilepsy patients to find ways to preserve brain health 2
(Date:9/19/2014)... Paul, Minnesota (PRWEB) September 19, 2014 ... from related food industries will gather October 5–8, ... at the Rhode Island Convention Center in Providence, ... will feature the work of food scientists, chemists, ... quality control, and food production management. To date, ...
(Date:9/18/2014)... HealthTronics, Inc ., a ... products and services, announced that a poster related ... versus external beam radiotherapy (EBRT) is being presented ... Association (MAAUA) Annual Meeting in Baltimore, Maryland September ... Cryosurgery and External Beam Radiation as Treatments for ...
(Date:9/18/2014)... September 18, 2014 ... http://www.researchandmarkets.com/research/czvg3s/biocompatible ) has announced the addition ... Global Strategic Business Report" report ... ,This report analyzes the worldwide markets ... by the following Product Segments: Polymeric ...
(Date:9/18/2014)... 2014 Research and Markets has ... Industry Report 2014" report to their offering. ... is a professional and in-depth study on the current ... The report provides a basic overview of the industry ... human albumin market analysis is provided for the international ...
Breaking Biology Technology:Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 2Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 3HealthTronics Announces Data Comparing Cryotherapy Versus Radiation for Treating Prostate Cancer Poster Presented at the American Urological Association Regional Meeting 2Biocompatible Materials - Global Strategic Business Report 2014 2Biocompatible Materials - Global Strategic Business Report 2014 3Global Human Albumin Industry Report 2014 2Global Human Albumin Industry Report 2014 3
... , SAN DIEGO, Sept. 22 ... services, introduces the TurboLink Conjugation Catalyst, making conjugation at least ... antibodies, oligos, peptides and proteins. , , ... have traded conjugation speed for poor yields, poor quality and ...
... , ... Opportunities as Other Sectors Struggle , ... Minneapolis (Vocus) – Medical real estate continues to be one of the bright spots ... the most recent edition of the Healthcare Real Estate Insights (HREI) newsletter., , , , ...
... ... an oncology contract research organization in the US and Europe, is ... Inder Makin, M.D., Ph.D., who joins the company as Vice President, ... throughout the product life cycle including early design and prototyping, simulation, ...
Cached Biology Technology:SoluLinK Introduces Product that Links All Biomolecules Greater Than 20 Times Faster with 100% Yields 2Deals keep Coming in Medical real Estate 2Medelis Expands CRO Services to Medical Devices, Appoints Dr. Inder Makin as VP 2Medelis Expands CRO Services to Medical Devices, Appoints Dr. Inder Makin as VP 3
...
Anti-Human Factor XI Purified (Polyclonal) (sheep IgG)...
Rabbit polyclonal to Wilms Tumor Protein ( Abpromise for all tested applications). entrezGeneID: 7490 SwissProtID: P19544...
Goat polyclonal to Dysadherin ( Abpromise for all tested applications). entrezGeneID: 53827...
Biology Products: