Navigation Links
UCLA team reports scalable fabrication of self-aligned graphene transistors, circuits
Date:6/17/2011

Graphene, a one-atom-thick layer of graphitic carbon, has the potential to make consumer electronic devices faster and smaller. But its unique properties, and the shrinking scale of electronics, also make graphene difficult to fabricate and to produce on a large scale.

In September 2010, a UCLA research team reported that they had overcome some of these difficulties and were able to fabricate graphene transistors with unparalleled speed. These transistors used a nanowire as the self-aligned gate the element that switches the transistor between various states. But the scalability of this approach remained an open question.

Now the researchers, using equipment from the Nanoelectronics Research Facility and the Center for High Frequency Electronics at UCLA, report that they have developed a scalable approach to fabricating these high-speed graphene transistors.

The team used a dielectrophoresis assembly approach to precisely place nanowire gate arrays on large-area chemical vapor depositiongrowth graphene as opposed to mechanically peeled graphene flakes to enable the rational fabrication of high-speed transistor arrays. They were able to do this on a glass substrate, minimizing parasitic delay and enabling graphene transistors with extrinsic cut-off frequencies exceeding 50 GHz. Typical high-speed graphene transistors are fabricated on silicon or semi-insulating silicon carbide substrates that tend to bleed off electric charge, leading to extrinsic cut-off frequencies of around 10 GHz or less.

Taking an additional step, the UCLA team was able to use these graphene transistors to construct radio-frequency circuits functioning up to 10 GHz, a substantial improvement from previous reports of 20 MHz.

The research opens a rational pathway to scalable fabrication of high-speed, self-aligned graphene transistors and functional circuits and it demonstrates for the first time a graphene transistor with a practi
'/>"/>

Contact: Jennifer Marcus
jmarcus@cnsi.ucla.edu
310-267-4839
University of California - Los Angeles
Source:Eurekalert

Page: 1 2

Related biology technology :

1. OncoSec Medical Reports Third Quarter 2011 Financial Results
2. China Cord Blood Corporation Reports Financial Results for the Fourth Quarter and Full Year of Fiscal 2011
3. Palatin Technologies, Inc. Reports Third Quarter Fiscal Year 2011 Results
4. Soligenix Reports First Quarter 2011 Financial Results and Reviews Accomplishments
5. Tengion Provides Business Update and Reports First Quarter 2011 Financial Results
6. SeraCare Reports Second Quarter Fiscal Year 2011 Financial Results
7. PharmAthene Reports First Quarter 2011 Financial and Operating Results
8. Micell Technologies Reports Preclinical Data for MiStent™ Drug-Eluting Coronary Stent to be Presented at EuroPCR
9. BioSpecifics Technologies Corp. Reports First Quarter 2011 Financial Results
10. Neuralstem Reports First Quarter Financial Results and Provides Business and Clinical Update
11. GenVec Reports First Quarter 2011 Financial Results
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... (PRWEB) July 10, 2014 Terascala, the ... announced that Alan Swahn, a former vice president of ... team as vice president of marketing. Terascala’s software when ... and NetApp create the highest performance and most reliable ... appointed to guide Terascala’s channel expansion and broaden its ...
(Date:7/10/2014)... Senior supply chain management executives from over ... challenges of “Reducing Cost, Lead Time, & Defects in ... Describing the partnership of the Bio Supply Management Alliance ... ( SCMI) of the University of San Diego ... Kroc Institute of Peace and Justice in San Diego, ...
(Date:7/10/2014)... July 10, 2014 Research and Markets ... the "International Photonic Integrated Circuit (Monolithic Integration, ... 2019" report to their offering. ... concept of photonic integration traces its roots in ... promise of photonic integration went unexplored and unfulfilled ...
(Date:7/10/2014)... PNAS (Proceedings of the National Academy of Sciences) ... deprivation have a significant effect on our metabolism. The ... time of day to test for diseases such as ... , Researchers from the University of Surrey and The ... sleep deprivation, body clock disruption and metabolism, and discovered ...
Breaking Biology Technology:Terascala Expands Executive Team 2Terascala Expands Executive Team 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2Time of day crucial to accurately test for diseases, new research finds 2
... 2011 Emerson Ecologics, LLC, the leading provider ... market, today announced that the company has expanded ... for their full product line of nutritional supplements. ... reversing chronic illness and improving health through science-based ...
... July 13, 2011 Reportlinker.com announces that ... in its catalogue: Industrial ... http://www.reportlinker.com/p0570053/Industrial-Biotechnology-China-News-1106.html#utm_source=prnewswire&utm_medium=pr&utm_campaign=Renewable_energy In this ... policy and regulation about biofuel, which include ...
... AMSTERDAM, July 12, 2011 , ... technical and,medical information products and services, today ... SciVal Strata,( http://www.info.scival.com/strata ),a web-based tool focused ... offers researchers and research administrators the,flexibility to ...
Cached Biology Technology:Emerson Ecologics Expands Partnership With Metagenics, Announces National Distribution Agreement 2Emerson Ecologics Expands Partnership With Metagenics, Announces National Distribution Agreement 3Industrial Biotechnology China News 1106 2Industrial Biotechnology China News 1106 3Industrial Biotechnology China News 1106 4Elsevier Integrates New Collaboration Analysis Capabilities Into SciVal Strata to Further Enhance Research Evaluation 2Elsevier Integrates New Collaboration Analysis Capabilities Into SciVal Strata to Further Enhance Research Evaluation 3
(Date:7/11/2014)... The Chinese University of Hong Kong, BGI and other ... to salt tolerance, with implication for improving this important ... online in Nature Communications provides an effective ... , Soybean is an important crop for the world. ... less genetic diversities than their wild counterparts. Among the ...
(Date:7/11/2014)... group members to reduce aggression and gain access to ... grooming activities shows a certain pattern across the day. ... Biology Letters . , Grooming between individuals in ... motives. To be groomed has hygienic benefits and is ... can provide access to infants, mating opportunities and high ...
(Date:7/11/2014)... two different ways that allow unprecedented experimental insights ... of oxygen molecules in photosynthesis. The two studies ... Nature Communications . , "The new knowledge will ... oxidation, which are key components for building artificial ... energy in fuels like hydrogen, ethanol or methanol," ...
Breaking Biology News(10 mins):BGI reports a novel gene for salt tolerance found in wild soybean 2Baboons groom early in the day to get benefits later 2Molecular snapshots of oxygen formation in photosynthesis 2
... at Chapel Hill shows how a protein may be crucial ... protein, called "eed," is needed for an essential chemical modification ... findings appear in the May 24 issue of the journal ... a new wave of thinking in genetics: that not all ...
... most, the mere mention of the word "virus" stirs ... suffering. But in recent years, scientists have been trying ... the fight against cancer. , Through genetic engineering, viruses ... abilities to infiltrate, commandeer, replicate and destroy, but only ...
... Howard Hughes Medical Institute have succeeded in mapping the ... range of odors, including vanilla, skunk, fish, urine, musk, ... of neural activity represents a significant step in understanding ... in the nose into odor perception in the brain, ...
Cached Biology News:Protein helps regulate the genes of embryonic stem cells 2Turning viruses into allies against cancer 2Turning viruses into allies against cancer 3Turning viruses into allies against cancer 4Decoding the logic of olfaction 2Decoding the logic of olfaction 3Decoding the logic of olfaction 4
... introduced the highly potent TURBO DNase (patent pending) ... was set in DNA removal capabilities. TURBO DNase ... that is much more efficient than wild type ... unwanted DNA. TURBO DNase binds DNA substrates 6-fold ...
... IEC Centra CL3 series is designed ... research and clinical applications at a ... package includes quick connect rotors and ... yet intuitive interface allows you to ...
Porcine Pulmonary Artery Endothelial Cells (PPAEC) (>500,000 cells)...
... DNA Polymerase I Large (Klenow) Fragment, Exonuclease ... lacks both the 5´→3´ and the 3´→5´ ... DNA Polymerase I (1,2). It is used ... strand displacement amplification (5). Klenow Fragment, Exonuclease ...
Biology Products: