Navigation Links
New techniques produce cleanest graphene yet
Date:10/31/2013

>Once they created the stack, they etched it to expose the edge of the graphene layer, and then evaporated metal onto the edge to create the electrical contact. By making contact along the edge, the team realized a 1D interface between the 2D active layer and 3D metal electrode. And, even though electrons entered only at the 1D atomic edge of the graphene sheet, the contact resistance was remarkably low, reaching 100 Ohms per micron of contact widtha value smaller than what can be achieved for contacts at the graphene top surface.

With the two new techniquesthe contact architecture through the 1D edge and the stacking assembly method that prevents contamination at the interfacesthe team was able to produce what they say is the "cleanest graphene yet realized." At room temperature, these devices exhibit previously unachievable performance, including electron mobility at least twice as large as any conventional 2D electron system, and sheet resistivity less than 40 Ohms when sufficient charges are added to the sheet by electrostatic "gating." Amazingly, this 2D sheet resistance corresponds to a "bulk" 3D resistivity smaller than that of any metal at room temperature. At low temperature, electrons travel through the team's samples without scattering, a phenomenon known as ballistic transport. Ballistic transport, had previously been observed in samples close to one micrometer in size, but this work demonstrates the same behavior in samples as large as 20 micrometers. "So far this is limited purely by device size," says Dean, "indicating that the true 'intrinsic' behavior is even better."

The team is now working on applying these techniques to develop new hybrid materials by mechanical assembly and edge contact of hybrid materials drawing from the full suite of available 2D layered materials, including graphene, boron nitride, transition metal dichlcogenides (TMDCs), transition metal oxides (TMOs), and topological insulators (TIs). "We are taking adva
'/>"/>

Contact: Holly Evarts
holly.evarts@columbia.edu
347-453-7408
Columbia University
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. ResearchMoz: Vaccine Production Market (Trends, Techniques, Key Players, Spending Estimates and Forecasts)
2. New measuring techniques can improve efficiency, safety of nanoparticles
3. BioTechniques Announces the Publication of 'Transfection' – The First Issue of a New, Digital-Only Spotlight Series
4. BioTechniques: The International Journal of Life Science Methods Announces the Publication of the March 2013 Digital Edition Now Available Online and in the App Store
5. New Techniques Use Lasers, LEDs, and Optics to ‘See’ Under the Skin
6. The BioTechniques 30th Anniversary Lecture Announced as Part of the 2013 BioTechniques Virtual Symposium
7. BioTechniques: The International Journal of Life Science Methods Announces the Publication of the October 2013 Digital Edition Now Available Online and in the App Store
8. New nano-material combinations produce leap in infrared technology
9. Simple, cheap way to mass-produce graphene nanosheets
10. IGY Immune Technology & Life Sciences Purchases Manufacturing Facility to Produce Purified Immunoglobulin Y (IgY)
11. Butamax Granted Core Patent for Making Biobutanol and Distillers Grains; Offers Producers Efficient, Low-Cost Production of Biobutanol
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New techniques produce cleanest graphene yet
(Date:12/24/2014)... China Biologic Products, Inc. (NASDAQ: CBPO, ... integrated plasma-based biopharmaceutical company in China ... Shandong Taibang Biological Products Co. Ltd., has received ... Food and Drug Administration (the "CFDA") for its ... in the Company,s public filings, the CFDA inspected ...
(Date:12/24/2014)... , Dec. 23, 2014  NeuroLifeSciences announced today ... in children with attention deficit/hyperactivity disorder published in ... The paper, titled "Pilot Phase 2 ... ( Konofal et al, Drug Des Devel ... shows that mazindol might be an effective, well-tolerated, ...
(Date:12/22/2014)... 2014 GenomeDx Biosciences today announced that a ... a genomic test for prostate cancer, was able to ... by radical prostatectomy without adjuvant therapy. Although rapid metastasis ... using tumor genomics to identify these men who have ... important advance. The study has been published online ...
(Date:12/19/2014)... (PRWEB) December 19, 2014 Bioject ... developer and manufacturer of needle-free injection technology, today ... with Immunomic Therapeutics, Inc. (“ITI”) for ITI to ... with its LAMP™ vaccine platform. , In ... exclusive Worldwide license to the Biojector®-2000 that triggers ...
Breaking Biology Technology:China Biologic Receives GMP Certification for New Coagulation Factor Facility 2China Biologic Receives GMP Certification for New Coagulation Factor Facility 3Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 2Study Published in European Urology Shows that the Decipher Prostate Cancer Classifier is Predictive of Rapid Metastasis in High-Risk Men who have had Prostate Surgery 3Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 2Bioject and Immunomic Therapeutics Enter into an Agreement for License of Needle-Free Technology for LAMP-vax Vaccines 3
... ... ... EDMONTON , March 16 /PRNewswire-FirstCall/ - BioMS Medical Corp. (TSX: ... , ...
... Mina Mar Group ( http://www.minamargroup.com/ ) as forefront representative of the company,s new expansive corporate interests. , ... , , ... ... ...
... it has received a Paragraph IV Notice Letter,from Teva Pharmaceuticals USA, Inc. ("Teva") advising of the filing of an,Abbreviated New Drug Application ("ANDA") ... ... , , ... ...
Cached Biology Technology:BioMS Medical Announces 2009 Year End Results 2BioMS Medical Announces 2009 Year End Results 3BioMS Medical Announces 2009 Year End Results 4BioMS Medical Announces 2009 Year End Results 5BioMS Medical Announces 2009 Year End Results 6BioMS Medical Announces 2009 Year End Results 7BioMS Medical Announces 2009 Year End Results 8BioMS Medical Announces 2009 Year End Results 9BioMS Medical Announces 2009 Year End Results 10DDS Technologies USA, Inc. (DDSU) Appoints Mina Mar Group as Its Corporate Advisor for a Merger 2DDS Technologies USA, Inc. (DDSU) Appoints Mina Mar Group as Its Corporate Advisor for a Merger 3DDS Technologies USA, Inc. (DDSU) Appoints Mina Mar Group as Its Corporate Advisor for a Merger 4DDS Technologies USA, Inc. (DDSU) Appoints Mina Mar Group as Its Corporate Advisor for a Merger 5DDS Technologies USA, Inc. (DDSU) Appoints Mina Mar Group as Its Corporate Advisor for a Merger 6Shire Receives INTUNIV (TM) Paragraph IV Notice Letter From Teva Pharmaceuticals 2Shire Receives INTUNIV (TM) Paragraph IV Notice Letter From Teva Pharmaceuticals 3Shire Receives INTUNIV (TM) Paragraph IV Notice Letter From Teva Pharmaceuticals 4
(Date:12/19/2014)... Calif. , Dec. 18, 2014  23andMe, Inc., ... of a study that pinpoints fine-scale differences in genetic ... States . Since immigrants first arrived ... United States has served as a meeting ... how American history and the ongoing mixing of peoples ...
(Date:12/17/2014)... RALEIGH, N.C. , Dec. 16, 2014 ... has licensed its PerformTek biometric technology to industry leaders ... their highly accurate, clinically validated, biometric wearable products. These ... January 6-9 in Las Vegas . ... the technology is accurate, flexible and robust – with ...
(Date:12/11/2014)... , Dec. 09, 2014 Research and ... ( http://www.researchandmarkets.com/research/9ql3kr/biometrics_market ) has ... in India 2015-2019" report to their offering. ... this market is the adoption of multimodal biometric ... characteristic of an individual for verification and identification ...
Breaking Biology News(10 mins):23andMe Study Sketches Genetic Portrait of the United States 223andMe Study Sketches Genetic Portrait of the United States 323andMe Study Sketches Genetic Portrait of the United States 4Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... Simplifying the process for forming compounds that can be ... plastics, has earned one University of Houston chemist a ... of chemistry in the College of Natural Sciences and ... mathematicians and economists in the United States and Canada ...
... productive as conventional systems" The answer is an unqualified, ... most of the time for corn and soybeans according ... Wisconsin-Madison and agricultural consulting firm AGSTAT in the March-April ... their answer on results from the Wisconsin Integrated Cropping ...
... biosensing nanodevice developed by Arizona State University researcher ... security checkpoints and revolutionize health screenings for diseases ... (MRSA). Even more incredible than the device ... worlds tiniest rotary motor: a biological engine measured ...
Cached Biology News:Simplifying manufacture of drugs, plastics earns UH chemist top honor 2Are organic crops as productive as conventional? 2Biosensing nanodevice to revolutionize health screenings 2Biosensing nanodevice to revolutionize health screenings 3
Rabbit polyclonal to FLIP ( Abpromise for all tested applications). entrezGeneID: 8837 SwissProtID: O15519...
... to Asparagine synthetase ( Abpromise ... Antigen: ... in the C-terminus of Human ... Entrez GeneID: 440 ...
Fluorescein isothiocyanate (FITC) mouse anti-human IFN-alpha2 25 tests...
Mouse monoclonal [M7-PB-E9] to pan alpha Sodium Potassium ATPase ( Abpromise for all tested applications)....
Biology Products: