Navigation Links
Self-cooling observed in graphene elctronics
Date:4/3/2011

CHAMPAIGN, Ill. With the first observation of thermoelectric effects at graphene contacts, University of Illinois researchers found that graphene transistors have a nanoscale cooling effect that reduces their temperature.

Led by mechanical science and engineering professor William King and electrical and computer engineering professor Eric Pop, the team will publish its findings in the April 3 advance online edition of the journal Nature Nanotechnology.

The speed and size of computer chips are limited by how much heat they dissipate. All electronics dissipate heat as a result of the electrons in the current colliding with the device material, a phenomenon called resistive heating. This heating outweighs other smaller thermoelectric effects that can locally cool a device. Computers with silicon chips use fans or flowing water to cool the transistors, a process that consumes much of the energy required to power a device.

Future computer chips made out of graphene carbon sheets 1 atom thick could be faster than silicon chips and operate at lower power. However, a thorough understanding of heat generation and distribution in graphene devices has eluded researchers because of the tiny dimensions involved.

The Illinois team used an atomic force microscope tip as a temperature probe to make the first nanometer-scale temperature measurements of a working graphene transistor. The measurements revealed surprising temperature phenomena at the points where the graphene transistor touches the metal connections. They found that thermoelectric cooling effects can be stronger at graphene contacts than resistive heating, actually lowering the temperature of the transistor.

"In silicon and most materials, the electronic heating is much larger than the self-cooling," King said. "However, we found that in these graphene transistors, there are regions where the thermoelectric cooling can be larger than the resistive heatin
'/>"/>

Contact: Liz Ahlberg
eahlberg@illinois.edu
217-244-1073
University of Illinois at Urbana-Champaign
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. DNA engine observed in real-time traveling along base pair track
2. Expanding drug development horizons: Receptor behaviors observed in living cell membranes
3. Expanding drug development horizons: Receptor behaviors observed in living cell membranes
4. Pfizer Announces EMPHASIS-HF Trial to Halt Recruitment due to Significant Benefit Observed in Patients Treated With Inspra® (Eplerenone)
5. Templated growth technique produces graphene nanoribbons with metallic properties
6. Berkeley Lab scientists control light scattering in graphene
7. Penn physicists develop scalable method for making graphene
8. Physicists isolate bound states in graphene-superconductor junctions
9. Tuning graphene film so it sheds water
10. New transistors: An alternative to silicon and better than graphene
11. Real-world graphene devices may have a bumpy ride
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Self-cooling observed in graphene elctronics
(Date:10/22/2014)... 2014 Shimadzu Scientific Instruments introduces its ... for the pain management and clinical markets. The software ... review by allowing users to highlight and review results ... QuantAnalytics allows analysts to filter results by group or ... by eliminating the need to sift through analytes of ...
(Date:10/22/2014)... Cranford, NJ (PRWEB) October 22, 2014 ... technologies and services – has been working with a ... Health and New Haven Farms Community Farming Collaborative to ... iPad-based ePRO solution. The study, which started in ... Wellness program that provides participants weekly exposure to and ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 Grace Century, ... and healthcare projects, announces the addition of Dr. ... to its advisory team. Dr. Siddiqui will provide further ... , A graduate of University College Medical School ... degreed in medicine in 2001. With further certification as ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 According ... Market by Service Type (Consulting, Integration, Deployment & ... by Deployment Model (Public, Private, Others (Hybrid & ... MarketsandMarkets, defines and segments the Cloud Professional Services ... and forecasting of revenues. It also identifies the ...
Breaking Biology Technology:Shimadzu Releases QuantAnalytics Open Access LCMS Software Package for Clinical Applications 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3Dr. Yousef Siddiqui joins the Grace Century Advisory Team 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5
... SAN DIEGO, Feb. 3 Gen-Probe Incorporated (Nasdaq: ... has joined the Company as senior vice president, research ... expertise and leadership to our already strong senior management ... officer. "We believe Eric will play an integral ...
... Primary and Key Secondary Endpoints -- CAPACITY 1 Misses ... Submit NDA and MAA -BRISBANE, Calif., Feb. 3 ... results from the two Phase 3 CAPACITY studies evaluating ... The primary endpoint of change in percent predicted Forced ...
... is like none other. To mark the observance, African ... promote science education, achievement motivation and positive psychological development among ... ... Washington, DC (PRWEB) February 3, 2009 -- African Ancestry, Inc., ...
Cached Biology Technology:Eric Lai Joins Gen-Probe as Senior Vice President, Research and Development 2InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 2InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 3InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 4InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 5InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 6InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 7InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 8InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 9InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 10InterMune Reports Results of Two Phase 3 CAPACITY Studies of Pirfenidone in IPF 11African Ancestry, Educators, Identity Experts Launch DNA Education Project during Historic Black History Month; 7th Graders Score High on Ultimate Self Test 2African Ancestry, Educators, Identity Experts Launch DNA Education Project during Historic Black History Month; 7th Graders Score High on Ultimate Self Test 3
(Date:10/15/2014)... has admitted Johannes Gutenberg University Mainz (JGU) as ... hub continues to maintain a significant nationwide standing ... "The acceptance of Johannes Gutenberg University Mainz as ... milestone in the national and international competition for ... of Rhineland-Palatinate can be proud that Mainz University ...
(Date:10/15/2014)... the 44th Rosenstiel Award for Distinguished Work in Biomedical ... the mechanisms of genomic instability and its implications for ... second alumnus to win the Rosenstiel Award; the first, ... Alt is the Charles A. Janeway Professor of Pediatrics ... an investigator at the Howard Hughes Medical Institute at ...
(Date:10/14/2014)... 2014)—It,s been millions of years since T. rex ... by Ohio University scientists is breathing life back into ... dinosaur snouts. The research has important implications for how ... to enhance the sense of smell and cool their ... Ohio University doctoral student Jason Bourke, lead author of ...
Breaking Biology News(10 mins):Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 2Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 3Brandeis awards 44th Rosenstiel Award to pioneering geneticist Fred Alt 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 2Dinosaur breathing study shows that noses enhanced smelling and cooled brain 3
... Bartness, Regents, Professor of Biology at Georgia State University, ... Institutes of Health to further research into the biological ... Research in Time (MERIT) award from the National Institute ... his lab,s investigation into the communication loop between fat ...
... new study suggests that it might be a genetic ... three thousand men - all pairs of male twins ... first time they had sex. Many participants in the ... and premature ejaculation at their first sexual encounter. These ...
... called a "Dream Team." Lombardi Comprehensive Cancer ... DSc, and 12 of the nation,s top breast cancer ... Stand Up To Cancer (SU2C) to form a scientific ... and brightest scientists will conduct new breast cancer research ...
Cached Biology News:Researcher garners major award from NIH for further exploration into the mechanisms of obesity 2Lombardi scientist brings 'dream team' breast cancer research effort to GUMC 2Lombardi scientist brings 'dream team' breast cancer research effort to GUMC 3
... BD Pathway 435 is an affordable, ... plates and slides, providing a broad ... system rapidly acquires high-resolution images with ... flexible computer-controlled excitation and emission filter ...
... include: Microarray hybridization chamber assembly (1 ... clamp, thumbscrew) Microarray chamber user guide ... intended to be cleaned and reused. The ... Catalog Oligo Microarray kits and all custom ...
... Blood Vessel Staining Kit is a very ... vascular endothelial cells, containing both anti-von Willebrand ... applicable to a variety of species. This ... for the staining of frozen and paraffin-embedded ...
... Coon's Modification of Ham's F-12 was ... produced by viral fusion. The modification consists ... and including ascorbic acid. The salt concentrations ... contains 0.863 mg zinc sulfate per liter, ...
Biology Products: