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:7/28/2015)... Research and Markets ... the "Analysis of the Global Flow Cytometry ... Globally, flow cytometry remains a popular tool ... and stem cells. But the market is witnessing ... demand from underdeveloped nations to quantitate CD4 cell ...
(Date:7/28/2015)... 28, 2015 Deerfield Management Company, L.P. today ... L.P., which will invest in groundbreaking advancements in science ... cancer, and orphan diseases. The venture capital fund will ... are developed and improve the way healthcare is delivered ... largest healthcare-focused venture funds in the sector, will donate ...
(Date:7/28/2015)... , July 28, 2015  Moerae Matrix Inc. ... 1 clinical trial with MMI-0100, a first-in-class inhibitor ... developed for pulmonary disorders characterized by inflammation and ... United Kingdom , is a double-blind, two-way ... the safety and tolerability of MMI-0100 when given ...
(Date:7/28/2015)... CITY , July 28, 2015 /PRNewswire/ - Aeterna ... today announced that it has granted to German ... funding the development and commercialization of biotechnology (collectively, ... live recombinant oral allogenic tumor vaccine technology (the ... for prostate cancer which is ready to enter ...
Breaking Biology Technology:Analysis of the Global Flow Cytometry Market 2012-2018 with a 2014 Base Year and a 2015-2018 Forecast Period 2Deerfield Launches $550 Million Healthcare Venture-Capital Fund 2Deerfield Launches $550 Million Healthcare Venture-Capital Fund 3Moerae Initiates Lipopolysaccharide (LPS) Challenge Study of Inhaled MMI-0100 for Pulmonary Disease Following Encouraging Safety and Tolerability Observed in Single Ascending Dose Phase 1 Study 2Aeterna Zentaris Grants Option to Develop and Commercialize Oral Allogenic Cancer Vaccine Technology 2Aeterna Zentaris Grants Option to Develop and Commercialize Oral Allogenic Cancer Vaccine Technology 3
... tiaras to anklets are treasures but these gemstones inside ... Reserve University researchers are building implants made of diamond ... and electrical changes in the brain of patients suffering ... movement in the paralyzed. The work of Heidi ...
... high-impact journal, Applied Physics Letters , contains a ... start-up company Gamma Dynamics that promises to dramatically reshape ... electrofluidics breakthrough by the Novel Devices Laboratory at the ... and Sun Chemical follows about seven years of work. ...
... gyroscopes, also known as rotation sensors, are widely used ... airplanes, measuring the rotation rates of a vehicle on ... Prof. Koby Scheuer of Tel Aviv University,s School of ... technology for use in smartphones, medical equipment and more ...
Cached Biology Technology:Gem of an idea: A flexible diamond-studded electrode implanted for life 2Gem of an idea: A flexible diamond-studded electrode implanted for life 3Breakthrough e-display means electronics with high speed, high readability and low power usage 2Breakthrough e-display means electronics with high speed, high readability and low power usage 3Breakthrough e-display means electronics with high speed, high readability and low power usage 4A tracking device that fits on the head of a pin 2
(Date:7/27/2015)... SAN JOSE, Calif. , July 27, 2015 ... leading developer of human interface solutions, today announced ... ClearPad ® touchscreen solution for its stylish ... controller for its proven reliability, low power and ... with a wet finger. Huawei designers also required ...
(Date:7/27/2015)... , July 27, 2015   Zynx Health ... experience-based clinical improvement solutions, today announced that its ... now available on Android smartphones and tablets. With ... post-care organizations can use ZynxCarebook to securely exchange ... condition, streamline care transitions to other care settings, ...
(Date:7/23/2015)... 2015 Aware, Inc. (NASDAQ: AWRE ), a ... results for its second quarter ended June 30, 2015.  ... $4.5 million, a decrease of 33% compared to $6.8 million ... second quarter of 2015 was $0.3 million, or $0.01 per ... diluted share, in the same period a year ago.  ...
Breaking Biology News(10 mins):Synaptics Touchscreen Solution Powers New Huawei Watch 2Synaptics Touchscreen Solution Powers New Huawei Watch 3Zynx Health Adds Android Device Support to ZynxCarebook Solution 2Zynx Health Adds Android Device Support to ZynxCarebook Solution 3Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6
... are alarmed that the government of The Gambia is ... medications in order to try an unproven herbal remedy. ... Jammeh to cease his unproven claims that the treatment ... began applying his treatment to a handful of patients ...
... of the statin drugs widely used for lowering cholesterol in ... water maze - in mice genetically bred to have an ... and females, the results were more pronounced in males. , ... University of Antigua, and colleagues at Florida A & M ...
... advance that can potentially assist cancer diagnosis, a ... blood vessels by taking advantage of the natural ... carries oxygen throughout the bloodstream. The research will ... ?May 11. , The new laser-based method, developed ...
Cached Biology News:HIVMA opposes The Gambia's unproven AIDS remedy 2Statin treatment improves spatial memory in mouse models of Alzheimer's 2Catching cancer's spread by watching hemoglobin 2Catching cancer's spread by watching hemoglobin 3
...
in vitro Translation, Accessory Products...
... The GenoStat Inducible Expression System provides ... in mammalian cells and is capable of ... control is mediated by the highly specific ... chimeric bipartite nuclear receptor complex. Gene expression ...
Mouse Aminopeptidase P2/XPNPEP2 Biotinylated Aff Pur PAb Keywords: AminopeptidaseP2, Metalloproteinase, Metalloprotease, X-Prolyl Aminopeptidase 2, X-Pro Aminopeptidase 2, Membrane-bound Prote...
Biology Products: