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

New York, NYOctober 31, 2013Columbia Engineering researchers have experimentally demonstrated for the first time that it is possible to electrically contact an atomically thin two-dimensional (2D) material only along its one-dimensional (1D) edge, rather than contacting it from the top, which has been the conventional approach. With this new contact architecture, they have developed a new assembly technique for layered materials that prevents contamination at the interfaces, and, using graphene as the model 2D material, show that these two methods in combination result in the cleanest graphene yet realized. The study is published in Science on November 1, 2013.

"This is an exciting new paradigm in materials engineering where instead of the conventional approach of layer by layer growth, hybrid materials can now be fabricated by mechanical assembly of constituent 2D crystals," says Electrical Engineering Professor Ken Shepard, co-author of the paper. "No other group has been able to successfully achieve a pure edge-contact geometry to 2D materials such as graphene."

He adds that earlier efforts have looked at how to improve 'top contacts' by additional engineering such as adding dopants: "Our novel edge-contact geometry provides more efficient contact than the conventional geometry without the need for further complex processing. There are now many more possibilities in the pursuit of both device applications and fundamental physics explorations."

First isolated in 2004, graphene is the best-studied 2D material and has been the subject of thousands of papers studying its electrical behavior and device applications. "But in nearly all of this work, the performance of graphene is degraded by exposure to contamination," notes Mechanical Engineering Professor James Hone who is also a co-author of the study. "It turns out that the problems of contamination and electrical contact are linked. Any high-performance electronic materia
'/>"/>

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:1/14/2014)... 14, 2014 As pet owners drew up their lists of ... wrote: "Take better care of my furry companion." Nowadays there are ... top-brand carrying cases to take the little canine or feline darlings ... compelled to buy some pricey toys at the pet store. But ...
(Date:1/14/2014)... Jan. 14, 2014 The largest international professional ... plants and therapeutic derivatives thereof has endorsed an ... researchers about the challenges of adulterated herb and ... The Society for Medicinal Plant ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 iLab Solutions, the ... as the new Director of Product Strategy. In this role, ... as iLab sub-teams to guide in the development of iLab ... provides the maximum possible benefit to the scientific community by ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation ... developing and commercializing innovative therapies addressing major unmet ... it received the Notice of Allowance from the ... unique self-delivering RNAi compounds (sd-rxRNA®), for the treatment ...
Breaking Biology Technology:New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3
... call and webcast to begin after markets close at 2:00 p.m. PT ... ... Masimo Corporation,(Nasdaq: MASI ), the inventor of Pulse CO-Oximetry and,Measure-Through-Motion- ... the period ended,September 27, 2008 after the market closes on Monday, October ...
... Oct. 15 PURE Bioscience (Nasdaq:,PURE), creators of ... revenues for the fiscal year ended July 31, ... with $336,400 in the,prior fiscal year. The Company ... or $(0.24) per share, compared with a loss ...
... Agency Expanding Industry Connections, MOUNTAINSIDE, N.J., Oct. ... medical education company,today announced the hiring of Todd ... leverage his experience in medical education and,publishing as ... L&M, he,served as Manager of Publication Sales at ...
Cached Biology Technology:Masimo to Report Third Quarter 2008 Financial Results on October 27, 2008 2PURE Bioscience Reports Fourth Quarter and Year End Results 2PURE Bioscience Reports Fourth Quarter and Year End Results 3PURE Bioscience Reports Fourth Quarter and Year End Results 4PURE Bioscience Reports Fourth Quarter and Year End Results 5PURE Bioscience Reports Fourth Quarter and Year End Results 6PURE Bioscience Reports Fourth Quarter and Year End Results 7L&M Healthcare Communications LLC Expands Client Services With Executive Team Expansion 2
(Date:7/9/2014)... Bacterial infections usually announce themselves with pain and fever but ... are those that are sneaky and hard to beat. Now, ... the form of tiny DNA pyramids. Published in the journal ... the nanopyramids can flag bacteria and kill more of them ... note that some infectious pathogens can lie in wait, undetectable ...
(Date:7/9/2014)... by researchers at the NIH,s National Center ... collaborators to treat sickle cell disease has ... The drug candidate, Aes-103, is the first ... mechanism of sickle cell disease. Baxter now ... for regulatory approval and commercialization. , Sickle ...
(Date:7/9/2014)... vitamin D in their blood are more likely to survive ... highest levels of vitamin D have half the risk of ... reveal. , The study is the first to correlate total ... their diagnosis which includes that produced after exposure to ... long term survival prospects. , The University of Edinburgh ...
Breaking Biology News(10 mins):First drug candidate from NIH program acquired by biopharmaceutical company 2First drug candidate from NIH program acquired by biopharmaceutical company 3First drug candidate from NIH program acquired by biopharmaceutical company 4
... Foundation announced that five scientists with novel approaches to ... Damon Runyon-Rachleff Innovation Award. The grant of $450,000 ... career scientists whose projects have the potential to significantly ... The 2011 Damon Runyon-Rachleff Innovators are: ...
... Frontotemporal dementia is caused by a breakdown of nerve ... brain (fronto-temporal lobe), which leads to, among other symptoms, ... some forms of frontotemporal dementia is a genetically determined ... Dr. Anja Capell and Prof. Christian Haass have now ...
... Invasive plant species are a serious environmental, economic and ... native biodiversity and ecosystem functions, such as nutrient cycling. ... why some species dominate new habitats over native plants ... but rarely tested assumption, say biologists, is that these ...
Cached Biology News:Damon Runyon-Rachleff Innovation Awards granted for pioneering ideas in cancer research 2Damon Runyon-Rachleff Innovation Awards granted for pioneering ideas in cancer research 3Malaria medication may help against 1 type of frontotemporal dementia 2Home and away: Are invasive plant species really that special? 2
Rabbit polyclonal to Staphylococcus Enterotoxin E (Biotin) ( Abpromise for all tested applications)....
Rabbit polyclonal to Peptide E ( Abpromise for all tested applications)....
... siSolutions siRNA Custom Synthesis ... effective duplex RNA to knockdown ... 21-mers (19 RNA base pairs ... recently-published 27-mers, or other lengths ...
... first fully genetically encoded fluorescent sensor capable ... peroxide (H2O2), one of the main ROS ... of yellow fluorescent protein inserted into the ... (OxyR-RD), HyPer demonstrates submicromolar affinity to H2O2 ...
Biology Products: