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:8/31/2015)... SAN FRANCISCO, Calif. , Aug. 31, 2015 /PRNewswire/ ... the discovery and development of novel cancer immunotherapies, announced ... M.D., Ph.D., as Chief Executive Officer and William ... Wong and Ho join an experienced management team led ... Jordan Fridman , Ph.D., Chief Scientific Officer; ...
(Date:8/31/2015)... , ... August 31, 2015 , ... There’s a new ... Minerva is the first commercially available new FDA approved system in the last 14 ... of 92%, the high Amenorrhea (zero bleeding) rate of 66%, the high Patient Satisfaction ...
(Date:8/28/2015)... ... 28, 2015 , ... Proove Biosciences , a commercial ... Spine Intervention Society’ s 23rd Annual Scientific Meeting (ASM). The ASM event ... focus on evidence-based research and clinical application, the event gathered industry thought leaders ...
(Date:8/27/2015)... (PRWEB) , ... August 27, 2015 , ... ... opportunity for venture capital funds, investment firms and animal health companies to hear ... have raised $160 million. Several have also received licensing agreements or distribution contracts. ...
Breaking Biology Technology:FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 2FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 3FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 4U.S. FDA Approves Minerva Endometrial Ablation System 2U.S. FDA Approves Minerva Endometrial Ablation System 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 2Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 3Proove Biosciences Presents New Research Study at the International Spine Intervention Society’s Annual Scientific Meeting 4VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 2VetStem Biopharma, Inc. Among Seventeen Companies Selected to Present at the KC Animal Health Investment Forum on September 1st 2015 3
... /PRNewswire-Asia/ -- China Botanic Pharmaceutical Inc. (AMEX: CBP ... distributor of botanical products, bio-pharmaceuticals and traditional Chinese medicines ("TCM") ... ended July 31, 2011. Third - ... and Recent Events Net sales increased 33.6% ...
... Inc. (Nasdaq: SGMO ) announced today that ... overview of the company,s business strategy at 7:30 am ... 2011 Global Life Sciences Conference which will be held ... Nichol, M.B., Ch.B., Sangamo,s executive vice president of research ...
... Pa., Sept. 14, 2011 Tengion, Inc. (NASDAQ: ... Brian Davis, Vice President Finance and Chief Financial Officer of ... Conference on Monday, September 19, 2011, at 1:30 pm EDT. ... be accessed under "Calendar of Events" in the Investors section ...
Cached Biology Technology:China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 2China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 3China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 4China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 5China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 6China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 7China Botanic Pharmaceutical Reports Third-Quarter Fiscal Year 2011 Results 8Sangamo BioSciences Announces Presentation at the 2011 UBS Global Life Sciences Conference 2Tengion to Present at UBS Global Life Sciences Conference 2
(Date:8/6/2015)... JOSE, Calif. , Aug. 6, 2015 /PRNewswire/ ... leading developer of human interface solutions, today announced ... TouchPad technologies on Windows 10. Microsoft leveraged Synaptics, ... to the operating system. Through ... drivers are fully certified with Microsoft,s Precision TouchPad ...
(Date:8/5/2015)... 2015 Transparency Market Research has ... - Global Industry Analysis, Size, Share, Growth, Trends and ... recognition is forecast to reach US$ 2,671.8 Mn by ... surveillance systems by civil and government agencies. This is ... terrorist activities across the globe that would elevate the ...
(Date:8/4/2015)... 04, 2015 ... announced the addition of the "Digital ... Service), Sub-Segment (Computer Forensics, Network Forensics, Mobile ... Service, Vertical and Region - Global Forecast ... By Component (Hardware, Software, and ...
Breaking Biology News(10 mins):Synaptics Chosen for Human Interface Co-Development on Windows 10 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 2Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 3Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 4Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 5Facial Recognition Market Expected to Reach US$ 2.67 Bn by 2022, at a CAGR of 9.5% From 2015 - 2022: Transparency Market Research 6Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2
... an essential nutrient similar to the B vitamin and found ... eggs, when given as a dietary supplement in the last ... a lower rate of physiological schizophrenic risk factors in infants ... its potentially therapeutic findings and in its strategy to target ...
... In addition to causing smoggy skies and chronic coughs, soot ... number two contributor to global warming. It,s second only to ... panel., The new study concludes that black carbon, the soot ... to global warming as previously estimated, even by the 2007 ...
... HONOLULU While the iconic Haleakalā silversword plant made a ... a period of substantial climate-related decline. New research published this ... the silversword in its native habitat. Known for its ... single reproductive event at the end of its life, at ...
Cached Biology News:Choline supplementation during pregnancy presents a new approach to schizophrenia prevention 2International study: Where there's smoke or smog, there's climate change 2International study: Where there's smoke or smog, there's climate change 3Global warming may have severe consequences for rare Haleakalā silverswords 2
Glycerokinase; from Bacillus stearothermophilus...
A compact, high-speed single tube reader unit designed for benchtop 2D barcode reading. The unit can be used with all of ABgene's 2D barcoded tubes, including the 2ml CryoCode tube....
... FL is equipped with ... measurement technologies that complement ... advanced features of Fluoroskan ... Fluoroskan Ascent FL provides ...
... enzyme that catalyzes the conversion,of starch ... maltotriose and,dextrins. The level of a-amylase ... are of clinical importance,1-3 while plant ... industry.4, The EnzChek Amylase Assay Kit ...
Biology Products: