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 practical (extrinsic) cutoff frequency beyond 50 GHz.

This represents a significant advance toward graphene-based, radio-frequency circuits that could be used in a variety of devices, including radios, computers and mobile phones. The technology might also be used in wireless communication, imaging and radar technologies.


'/>"/>

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

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:3/23/2017)... Md. , March 23, 2017  Northwest ... developing DCVax® personalized immune therapies for solid tumor ... the $7.5 million financing it announced last Friday, ... sold to several institutional investors securities totaling 28,843,692 ... per share, and 10,000,000 shares of Class C ...
(Date:3/23/2017)... PARK, Calif., March 23, 2017  BioPharmX Corporation ... products for the dermatology market, today reported financial ... 31, 2017, and will provide an update on ... the year. "We are pleased to ... year for BioPharmX," said President Anja Krammer. "We ...
(Date:3/23/2017)... March 23, 2017 NetworkNewsWire Editorial Coverage  ... Cancer ... significant strain on health care systems, in terms of costs ... so too does the development of innovative and efficient therapies ... Among the many types of cancer treatments, a growing number ...
(Date:3/23/2017)... In today,s pre-market research, Stock-Callers.com ... Biotech industry: Sangamo Therapeutics Inc. (NASDAQ: SGMO), Eyegate Pharmaceuticals ... and Regulus Therapeutics Inc. (NASDAQ: RGLS ). ... its rating on Pharmaceuticals/Biotechnology to "Overweight" from "Market Weight." Learn more ... ...
Breaking Biology Technology:
(Date:3/2/2017)... 2017 Summary This report provides ... KGaA and its partnering interests and activities since 2010. ... Description The Partnering Deals and Alliance since 2010 report ... one of the world,s leading life sciences companies. ... to ensure inclusion of the most up to date ...
(Date:2/28/2017)... , Feb. 28, 2017   Acuant , ... software globally, announces significant enhancements to new and core ... 2016. New products include mobile and desktop Acuant FRM ... TM - a real time manual review of ... idScan® technology provides the fastest and most accurate capture ...
(Date:2/26/2017)... 2017  Securus Technologies, a leading provider of ... safety, investigation, corrections and monitoring, announces the appointment ... "Too often, too many offenders return to ... are trying to tackle this ongoing problem and ... family members. While significant steps are underway, Securus continues ...
Breaking Biology News(10 mins):