Navigation Links
Templated growth technique produces graphene nanoribbons with metallic properties
Date:3/21/2011

growth of graphene structures, allowing the formation of nanoribbons and other structures of specific widths and shapes without the use of cutting techniques that produce the rough edges.

In creating these graphene nanostructures, de Heer and his research team first use conventional microelectronics techniques to etch tiny "steps" or contours into a silicon carbide wafer whose surface has been made extremely flat. They then heat the contoured wafer to approximately 1,500 degrees Celsius, which initiates melting that polishes any rough edges left by the etching process.

Established techniques are then used for growing graphene from silicon carbide by driving off the silicon atoms from the surface. Instead of producing a consistent layer of graphene across the entire surface of the wafer, however, the researchers limit the heating time so that graphene grows only on portions of the contours.

The width of the resulting nanoribbons is proportional to the depth of the contours, providing a mechanism for precisely controlling the nanoribbon structures. To form complex structures, multiple etching steps can be carried out to create complex templates.

"This technique allows us to avoid the complicated e-beam lithography steps that people have been using to create structures in epitaxial graphene," de Heer noted. "We are seeing very good properties that show these structures can be used for real electronic applications."

Since publication of the Nature Nanotechnology paper, de Heer's team has been refining its technique. "We have taken this to an extreme the cleanest and narrowest ribbons we can make," he said. "We expect to be able to do everything we need with the size ribbons that we are able to make right now, though we probably could reduce the width to 10 nanometers or less."

While the Georgia Tech team is continuing to develop high-frequency transistors perhaps even at the terahertz range it
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Newly Updated for 2011: Medical Science Liaison Study Shows Growth in KOL Outreach, Impact
2. Global Growth Factors ( Blood And Tissue ) Industry
3. TPI Attends 23rd ROTH Annual OC Growth Stock Conference from March 13-16, 2011
4. Palatin Technologies, Inc. to Present at the ROTH 23rd Annual OC Growth Stock Conference
5. Leading Animal Stem Cell Developer MediVet-America Achieves Significant Business Growth Milestones in First Year
6. Californias Biomedical Industry is Poised for Growth Despite Increasing Global Competition, According to the 2011 California Biomedical Industry Report
7. Reportlinker Adds Biochips - Products, Applications, Technologies and End-Use Markets Growth Analysis, 2009-2015
8. Investigational Compound Offers Novel Anti-IGF Approach To Inhibit Growth of Cancer Cells
9. PharmAthene Strengthens Scientific Leadership and Program Management for Future Growth
10. MiMedx Group, Inc. to Present at the 13th Annual Needham Growth Conference
11. Resonetics Growth Leads to New Facility
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Templated growth technique produces graphene nanoribbons with metallic properties
(Date:7/29/2014)... 29, 2014  The Society for Clinical Research ... program for the 9 th annual Site ... Amelia Island , Florida.  The focus on ... unchanged, however, the topics and format will allow ... among all stakeholders with a continued focus on ...
(Date:7/29/2014)... CLARA, Calif. , July 29, 2014 /PRNewswire-iReach/ ... services agreement with FORMA Therapeutics, Inc., to provide ... and proprietary fragment-based lead discovery platform for novel ... really excited about the opportunity to work with ... fields of epigenetics and protein homeostasis. FORMA Therapeutics, ...
(Date:7/29/2014)... (PRWEB) July 29, 2014 July ... vaccine pioneer in the biotechnology industry, announced that ... Coast Securities, Inc. to explore financing opportunities that ... technology, a breakthrough vaccine platform with the potential ... The company exclusively licensed the well-established LAMP platform ...
(Date:7/29/2014)... WA (PRWEB) July 29, 2014 ... IRB services, has been awarded accreditation by the ... for its Lean Six Sigma Deployment Program. ... waste and improve performance. , Quorum’s Lean Six ... the Accredited Deployment Program designation. The designation is ...
Breaking Biology Technology:TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 2TransCelerate, Lilly, Pfizer, and FDA Highlight Collaborative Program at the Site Solutions Summit 3Nanosyn Announces Expanded Partnership With FORMA Therapeutics 2Immunomic Therapeutics Engages Newport Coast Securities, Inc. 2Immunomic Therapeutics Engages Newport Coast Securities, Inc. 3Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 2Quorum Review IRB Accredited by IASSC for Lean Six Sigma Deployment Program 3
... CINCINNATI, June 16, 2011 Kendle (Nasdaq: ... research organization, today announced several of its senior ... issues at the Drug Information Association (DIA) 47th ... experts will address key topics, including the benefits ...
... , New Generation of the Ziehm Vision RFD ... Imaging has launched a new generation of the Ziehm Vision,RFD ... allows it to be used over an almost unlimited period,of ... ORs.,Thanks to its mobility and significantly lower investment costs,the Ziehm ...
... 2011 NewCardio, Inc., (OTC BB: NWCI) a ... of its recent medical and technical submissions have ... Annual International Conference of the IEEE Engineering in ... The two papers: ,Wireless Monitoring of Reconstructed 12-Lead ...
Cached Biology Technology:Kendle Experts to Address Key Industry Issues at Drug Information Association 47th Annual Meeting 2Kendle Experts to Address Key Industry Issues at Drug Information Association 47th Annual Meeting 3SVS 2011: Ziehm Imaging Presents Latest Mobile C-armTechnology for Intraoperative use 2NewCardio Selected to Present at 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2NewCardio Selected to Present at 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society 3NewCardio Selected to Present at 33rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society 4
(Date:7/28/2014)... pinpointed a mechanism in part of the brain that is ... to both type 1 and type 2 diabetes. The findings ... of the National Academies of Sciences . , "We,ve ... part of the hypothalamus known as the ventromedial nucleus ... levels in the blood," said lead author Sabrina Diano, professor ...
(Date:7/28/2014)... The genome of Solanum pennellii , a wild ... an international group of researchers including the labs headed ... UC Davis Department of Plant Biology. The new genome ... , The work, published July 27 in the journal ... and colleagues at Aachen University in Germany. The UC ...
(Date:7/28/2014)... for Alzheimer,s disease and other forms of dementia, but ... treatment. , University of Washington bioengineers have a designed ... of the body,s normal proteins into a state that,s ... disease, Type 2 diabetes and Lou Gehrig,s disease. The ... their normal state into an abnormally folded form by ...
Breaking Biology News(10 mins):Glucose 'control switch' in the brain key to both types of diabetes 2New protein structure could help treat Alzheimer's, related diseases 2New protein structure could help treat Alzheimer's, related diseases 3
... DigitalPersona, Inc., a leader in fingerprint identity ... Solutions Company is now offering U.are.U fingerprint sensors ... modular point-of-sale (POS) workstation, the Stingray JS-950. The ... can be attached to either side of the ...
... land degradation in dryland regions continuing to worsen, ... on scientist-recommended indicators for monitoring and assessing desertification ... landmark agreement was reached after two weeks of ... attending the Ninth Session of the Conference of ...
... Israel, October 7, 2009 H2 Blocker drugs, such as ... reflux (heartburn), pose no significant risks for the fetus according ... University of the Negev. The study published in the ... the safety of the fetus when H2 blocker drugs ...
Cached Biology News:Panasonic Offers U.are.U(R) Fingerprint Sensor From DigitalPersona on Stingray JS-950 Point-of-Sale Workstations 2Satellite data instrumental in combating desertification 2Satellite data instrumental in combating desertification 3Heartburn drugs deemed safe for fetuses according to Ben-Gurion University researchers 2
Purified Mouse anti-Hu LAT (pY226) Storage Temperature: Refrigerate(2 to 8C)...
Tris-EDTA Buffer Solution, 1X, pH 8.0, sterile, Molecular Biology Grade...
... the most comprehensive, cost-effective solution to ... incorporated unprecedented quality into both our ... proven detection chemistries and antibodies that ... protocol. It also includes our competitively ...
...
Biology Products: