Navigation Links
Carbon nanoribbons could make smaller, speedier computer chips
Date:5/28/2008

Stanford chemists have developed a new way to make transistors out of carbon nanoribbons. The devices could someday be integrated into high-performance computer chips to increase their speed and generate less heat, which can damage today's silicon-based chips when transistors are packed together tightly.

For the first time, a research team led by Hongjie Dai, the J. G. Jackson and C. J. Wood Professor of Chemistry, has made transistors called "field-effect transistors"-a critical component of computer chips-with graphene that can operate at room temperature. Graphene is a form of carbon derived from graphite. Other graphene transistors, made with wider nanoribbons or thin films, require much lower temperatures.

"For graphene transistors, previous demonstrations of field-effect transistors were all done at liquid helium temperature, which is 4 Kelvin [-452 Fahrenheit]," said Dai, the lead investigator. His group's work is described in a paper published online in the May 23 issue of the journal Physical Review Letters.

The Dai group succeeded in making graphene nanoribbons less than 10 nanometers wide, which allows them to operate at higher temperatures. "People had not been able to make graphene nanoribbons narrow enough to allow the transistors to work at higher temperatures until now," Dai said. Using a chemical process developed by his group and described in a paper in the Feb. 29 issue of Science, the researchers have made nanoribbons, strips of carbon 50,000-times thinner than a human hair, that are smoother and narrower than nanoribbons made through other techniques.

Field-effect transistors are the key elements of computer chips, acting as data carriers from one place to another. They are composed of a semiconductor channel sandwiched between two metal electrodes. In the presence of an electric field, a charged metal plate can draw positive and negative charges in and out of the semiconductor. This allows the electric c
'/>"/>

Contact: Louis Bergeron
louisb3@stanford.edu
650-725-1944
Stanford University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Awareness of Genzymes Renvela(R) (Sevelamer Carbonate) is High, Although Uptake of this New Phosphate Binding Agent has Been Slower than Nephrologists and Renal Dietitians Initially Expected
2. Breakthrough in nanotechnology by uncovering conductive property of carbon-based molecules
3. Carbon nanotube measurements: latest in NIST how-to series
4. Carbon nanotubes made into conductive, flexible stained glass
5. The future of computing -- carbon nanotubes and superconductors to replace the silicon chip
6. Carbon nanotubes outperform copper nanowires as interconnects
7. Mission critical for carbon management
8. National Association of Emergency Medical Technicians (NAEMT) Supports Prehospital Screening for Carbon Monoxide in the Blood
9. Carbon offset warning from international team of scientists
10. International Association of Fire Fighters (IAFF) Advocates Screening Fire Fighters for Carbon Monoxide Poisoning Using Pulse CO-Oximetry
11. ADM, MGSC and ISGS Announce Carbon Sequestration Project
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/25/2014)... Los Angeles, California (PRWEB) October 23, 2014 ... VDRM ), a specialty pharmaceutical company devoted to ... pursuing out-licensing partnerships in 2015. , ViaDerma has ... method, which allows for rapid mass transfer of ... into the body to provide immediate localized therapy. ...
(Date:10/25/2014)... Va. (PRWEB) October 24, 2014 ... the nation’s leading nonprofit authority on the ... healthcare information exchange, announces its appointment of four ... Workgroup. The workgroup leaders include:, , ... ,     Erik Pupo, Specialist Leader, Deloitte Consulting ...
(Date:10/25/2014)... 24, 2014 A new way to ... pitfalls of current skin grafting technologies, it also speeds ... The method, outlined in the October issue of STEM ... deep skin injuries that result from severe burns and ... the skin’s regenerative elements. These wounds heal by contraction, ...
(Date:10/25/2014)... , Oct. 24, 2014  RegeneRx Biopharmaceuticals, Inc. (OTCBB: ... presented at the Fourth International Symposium on Thymosins in ... Italy.  "When thymosin beta 4 (TB4) ... into the peritoneal cavity in a rodent model of ... throughout the brain parenchyma (the functional tissue of the ...
Breaking Biology Technology:ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 2ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 3WEDI Appoints Four New Security and Privacy Workgroup Co-chairs 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 2New engineering method shows promise for faster healing, more cosmetically appealing skin grafts 3Researchers Report Thymosin Beta 4 Crosses Blood-Brain Barrier In Animal Stroke Model 2
... International,Corporation (Nasdaq: PRXL ) announced today that its ... Common Stock, which will be effected by,means of a ... will receive one additional share of,Common Stock for each ... of,February 22, 2008. The additional shares will be distributed ...
... Incorporated,(Nasdaq: GPRO ) announced today that Carl ... chief operating officer, effective March 1, 2008., ... 2007 as executive vice,president and chief operating officer. ... and development, manufacturing, and,sales and marketing., "Carl,s ...
... Feb. 11 BioSpace, the leading biotech,job board ... over 800,biotechnology and pharmaceutical job seekers to the ... CA., The BioSpace Career Fair attracted a ... diagnostics career,candidates from around southern California. The event ...
Cached Biology Technology:PAREXEL International Announces 2-For-1 Stock Split 2PAREXEL International Announces 2-For-1 Stock Split 3Carl Hull Named President and Chief Operating Officer of Gen-Probe 2Carl Hull Named President and Chief Operating Officer of Gen-Probe 3BioSpace Career Fair in San Diego Draws Record Number of Bioscience Candidates 2
(Date:10/16/2014)... severe respiratory tract infections and worldwide claims the ... VIB and Ghent University have succeeded in developing ... virus infection. , Xavier Saelens (VIB/UGent): "We ... way for the development of a novel approach ... suffering in numerous small children and elderly people." ...
(Date:10/15/2014)... book ,Models of Life, is a non-traditional biophysics textbook ... The book is a journey of discovery into biological ... life and biological regulation. It is about how our ... communication between the billions of cells in an organism. ... relationships between principles, which can be found on both ...
(Date:10/15/2014)... 44th Rosenstiel Award for Distinguished Work in Biomedical Science ... mechanisms of genomic instability and its implications for the ... alumnus to win the Rosenstiel Award; the first, Rod ... is the Charles A. Janeway Professor of Pediatrics and ... investigator at the Howard Hughes Medical Institute at Boston ...
Breaking Biology News(10 mins):New perspectives for development of an RSV vaccine 2New book about life as seen from physics 2Brandeis awards 44th Rosenstiel Award to pioneering geneticist Fred Alt 2
... Some parents of children with autism evaluate facial expressions ... a way that is strikingly similar to autistic patients ... Piven of the University of North Carolina at Chapel ... Institute of Technology. Piven, Adolphs and colleague ...
... in individuals of Asian descent increases the risk of ... the August Journal of Lipid Research . In ... this rare variant for apolipoprotein A-V had extremely high ... Apolipoprotein A-V is a recently discovered lipid-binding protein that ...
... BET DAGAN, ISRAEL - Table grapes are subject to serious ... the vine to dinner tables around the world. Mold and ... reduce grape quality during shipping and storage in retail produce ... are one way of ensuring that consumers get fresh, appealing ...
Cached Biology News:UNC, Caltech research finds further evidence for genetic contribution to autism 2UNC, Caltech research finds further evidence for genetic contribution to autism 3Genetic variant increases triglyceride levels in Asian-Americans 2Fresh from the grapevine to the table 2
... PureLink PCR Purification Kits provide rapid ... enzymes, short-failed PCR products, and salts from ... bind/wash/elute procedure:, provides two Binding Buffer ... bp* , can be performed in either ...
... PCR Cloning Kit offers the fastest ... cloning of blunt-end PCR products amplified ... includes the linearized and topoisomerase I-activated ... ligations without ligase (1). The pCR-Blunt ...
2.0 GHz Compaq Computer with 512 MB RAM, 32 MB AGP Graphics Card, 40 GB Hard Drive, 1 Serial Port & Open PCI Slot, Windows 2000 OS, MS Office, CD Read/Writer and 18 Flat Panel Monitor...
Blot Paper 7 x 8.5cm semi-dry western blots (order number RB-400)...
Biology Products: