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:12/19/2014)... Dec. 19, 2014 Naurex Inc., a biopharmaceutical ... for diseases of the central nervous system, today announced ... executive officer, will present at the 33 rd ... take place at 3:00 p.m. PST on Tuesday, January ... San Francisco, Calif. ...
(Date:12/19/2014)... -- Decision Resources Group finds that the Latin American ... compound annual growth rate through 2023. This is primarily ... increasing adoption of dental implants. Growing aesthetic consciousness in ... demand for dental biomaterials because they can improve the ... Other key findings from Decision Resources Group,s coverage ...
(Date:12/19/2014)... Today, TiFiber, Inc. announced ... and future company headquarters in Fort Smith, Arkansas ... that safely and effectively control dangerous microorganisms. Fort ... historic, strong support for manufacturing, but also due ... technology-based companies such as TiFiber. , In ...
(Date:12/19/2014)... Reports from CDC show approximately 117 ... or more chronic health conditions - including cardiovascular disease, ... of these diseases, but may not eliminate the severe ... implanted nerve stimulation devices today offer relief, they require ... induce side effects. , To eliminate the need ...
Breaking Biology Technology:Naurex to Present at 33rd Annual J.P. Morgan Healthcare Conference 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 2Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 3Technology Company TiFiber™ to Establish Production Facility in Fort Smith, Arkansas with Support from Local Investors 4Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2
... Blacksburg, Va. Researchers at the Virginia Bioinformatics Institute ... guidelines that should help researchers in their efforts to ... The stakes are high: the concept of biological parts ... engineering are to be applied to biology. If successful, ...
... Mass., Aug. 8 Pressure,BioSciences, Inc. (Nasdaq: PBIO ... to discuss its second quarter 2008 financial results and,to ... the,teleconference either by telephone or through a live web-cast. ... Date: Thursday, August 14, 2008, Time: 4:30 p.m. ...
... Aug. 8 MGT Capital Investments,Inc. (Amex: ... the Healthcare,Information Technology ("HCIT") sector, today reported financial ... and provided an update on,strategic milestones., Tim ... through,the first half of 2008 reflect continued progress ...
Cached Biology Technology:Tips on how to build a better home for biological parts 2Tips on how to build a better home for biological parts 3Pressure BioSciences, Inc. to Discuss Second Quarter 2008 Financial Results and Provide Business Update 2MGT Capital Investments Reports Second Quarter 2008 Financial Results and Provides Update on Recent Developments 2MGT Capital Investments Reports Second Quarter 2008 Financial Results and Provides Update on Recent Developments 3MGT Capital Investments Reports Second Quarter 2008 Financial Results and Provides Update on Recent Developments 4MGT Capital Investments Reports Second Quarter 2008 Financial Results and Provides Update on Recent Developments 5
(Date:12/17/2014)... , Dec. 15, 2014  HITLAB SM ... Clinical Practices (GCP) audit to confirm its adherence ... regulations. This accomplishment enables HITLAB to conduct regulated ... the highest principles for patient safety and research ... global healthcare access, quality, and delivery with innovative ...
(Date:12/15/2014)... , Dec. 12, 2014 Research and Markets ... addition of the "Global Facial Recognition Market ... http://photos.prnewswire.com/prnh/20130307/600769 Facial ... of individuals. Facial recognition system measures the overall ... jaw edges, mouth, and the distance between eyes. ...
(Date:12/11/2014)... Minn. , Dec. 10, 2014  Data ... physiologic monitoring, has released a new series of ... of preclinical toxicology researchers. M series, part of ... toxicologists collect the best possible physiologic data when ... Adding functional endpoints to toxicology studies has ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3New telemetry implants expected to change how large animal toxicology studies are conducted 2
... down plant matter and converting it to energy, the cow ... to eat more than 150 pounds of plant matter every ... previously unknown microbial enzymes in the bovine rumen the ... of switchgrass, a renewable biofuel energy source. The study, ...
... therapeutics have long looked to the future when a damaged ... heart cells. A study published in the February issue of ... Association, shows that heart stem cells from children with congenital ... the laboratory. Sunjay Kaushal, MD, ...
... at Scripps Institution of Oceanography at UC San Diego ... commercial fisheries in Northwest Mexico and the results could ... wildlife in the area. The scientists, led by ... fisheries offices around the region that includes Baja California ...
Cached Biology News:Team looks to the cow rumen for better biofuels enzymes 2Team looks to the cow rumen for better biofuels enzymes 3Stem cells show promise in repairing a child's heart 2Study finds common ground for ecosystems and fishing in Northwest Mexico 2
... of gene expression) technology allows ... profiles generated by SAGE are ... transcripts making it possible to ... Kit is designed to make ...
Sheep Serum US Origin...
... For the ultimate in utility and ... to meet the needs of the researcher. ... interior dimensions or as sheet material that ... enclosures. These isolators are autoclavable and non-cytotoxic ...
2,4-Dinitrophenyl hapten is conjugated to Human Serum Albumin (HSA) protein through lysine....
Biology Products: