Navigation Links
Graphene: What can go wrong? new studies point to wrinkles, process contaminants
Date:7/7/2011

Using a combination of sophisticated computer modeling and advanced materials analysis techniques at synchrotron laboratories, a research team led by the University at Buffalo (UB) and including the National Institute of Standards and Technology (NIST), the Molecular Foundry at Lawrence Berkeley National Laboratory and SEMATECH* has demonstrated how some relatively simple processing flaws can seriously degrade the otherwise near-magical electronic properties of graphene.

Their new paper** demonstrates how both wrinkles in the graphene sheet and/or chance contaminants from processingpossibly hiding in those foldsdisrupt and slow electron flow across the sheet. The results could be important for the design of commercial manufacturing processes that exploit the unique electrical properties of graphene. In the case of contaminant molecules at least, the paper also suggests that heating the graphene may be a simple solution.

Graphene, a nanostructured material that is essentially a one-atom thick sheet of carbon atoms arranged in a hexagonal pattern, is under intense study because of a combination of outstanding properties. It's extremely strong, conducts heat very well, and has high electrical conductivity while being flexible and transparent. Graphene's electrical properties, however, apparently depend a lot on flatness and purity.

Using X-rays, the UB team produced images that show the electron "cloud" lining the surface of graphene samplesthe structure responsible for the high-speed transit of electrons across the sheetand how wrinkles in the sheet distort the cloud and create bottlenecks. Spectrographic data showed anomalous "peaks" in some regions that also corresponded to distortions of the cloud. NIST researchers, using their dedicated materials science "beam line" at the National Synchrotron Light Source (NSLS),*** contributed a sensitive analysis of spectroscopic data confirming that these peaks were caused by chemical contaminan
'/>"/>

Contact: Michael Baum
baum@nist.gov
301-975-2763
National Institute of Standards and Technology (NIST)
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Generex Announces Publication of Comparative Peptide Vaccine Studies in Peer Review Journal Demonstrating Superiority of AE37 and Presentation at the American Association for Cancer Research
2. Genomic Health Presents Multiple International Studies Demonstrating Worldwide Value of Oncotype DX® Breast Cancer Test
3. Otonomys OTO-104 Demonstrates Hearing Loss Protection and Hearing Recovery in Preclinical Studies
4. Genomic Health Announces Multiple Colon Cancer Studies at the American Society of Clinical Oncology Gastrointestinal Cancers Symposium
5. Precision Therapeutics Announces Two Pancreatic Cancer Studies Emphasizing the Utility of ChemoFx® in Cancer Treatment Options
6. Halt Medical Presents Strong Results of International Fibroid Studies at National Institutes of Health Global Congress
7. Ocera Therapeutics Completes First in Human Studies with OCR-002 for the Treatment of Hyperammonemia and Hepatic Encephalopathy
8. Alder Biopharmaceuticals Announces That Data From Multiple Studies of ALD518 (BMS945429), an Investigational Antibody Therapeutic in Rheumatoid Arthritis Patients, to be Presented at Annual Meeting of the American College of Rheumatology
9. Omeros Announces Additional Support from the National Institute on Drug Abuse for Clinical Studies in Addiction Program
10. Helix BioPharma Completes Definitive GLP Toxicology Studies With L-DOS47 and is Making Final Preparations for its Planned Phase I/II Clinical Study IND/CTA Submissions
11. Not Only Size Matters: Genetic Megastudies Draw Out Distinctions Between Obesity and Waist-Hip Ratio
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... zFlo Motion , a US leader in biomechanics software ... a new partner. STT-Systems has developed an impressive ... with offerings in the optical-motion capture, 3D scanning, and industrial ... unit), iSen, is opening eyes around the world. With no ...
(Date:1/22/2015)... (PRWEB) January 22, 2015 Diagenode, ... such as the Bioruptor® and complete solutions for ... for chromatin immunoprecipitation, alleviating the need for manual ... controls needed for ChIP of histones or transcription ...
(Date:1/22/2015)...   GenoSpace , a precision medicine software company that has ... use of genomic, imaging and other biomedical data in research ... Munson , CEO of Aspera, an IBM Company, to its ... http://photos.prnewswire.com/prnh/20150122/170713 "We are pleased to welcome ...
(Date:12/24/2014)... YORK , Dec. 24, 2014 PlasmaTech Biopharmaceuticals, Inc. ... critical areas, announced the closing of an underwritten public offering ... up to an aggregate 3,500,000 shares of common stock, at ... warrant.  The warrants have a per share exercise price of ...
Breaking Biology Technology:3D Motion Capture Just Got Easy 2Diagenode Launches Unique Semi-Automated Solution for Chromatin Immunoprecipitation 2GenoSpace Expands Board with Appointment of Michelle Munson 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 2PlasmaTech Biopharmaceuticals, Inc. Announces Closing of Public Offering 3
... YORK, May 2 Pulmo BioTech Inc. (OTC,Bulletin Board: PLMO) ... Financial Officer., Pulmo BioTech Chief Executive Officer Garry McCann ... join the company and that Rajiv,s,experience and financial acumen would ... completion of its Phase I Human Trials and then into ...
... -- Quarterly Revenues Increase 62% to $11.7 million, ... million with EPS of $0.11, NEW YORK ... Pharma Holdings, Inc. ("China Pharma") (OTC Bulletin Board: ... products in China, today announced its financial results,for ...
... 7, 2008 at 10:00 AM EDT, CEDAR KNOLLS, ... ) will host a conference call discussing,its financial results ... May 7, 2008 at 10:00 AM EDT., A ... through the,company,s website at: http://www.emisphere.com . The live ...
Cached Biology Technology:Pulmo BioTech Announces Appointment of Chief Financial Officer 2Pulmo BioTech Announces Appointment of Chief Financial Officer 3China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 2China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 3China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 4China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 5China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 6China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 7China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 8China Pharma Holdings, Inc. Announces First Quarter 2008 Financial Results 9Emisphere Technologies, Inc. Announces Conference Call for First Quarter 2008 Financial Results 2
(Date:12/19/2014)... LAS VEGAS , Dec. 18, 2014   LaunchKey ... built for the post-password and Internet of Things era, ... seed funding. The venture round was led by Metamorphic ... Capital, Rimrock Venture Partners, VegasTechFund, and others.  LaunchKey has ...
(Date:12/17/2014)... , Dec. 16, 2014 Valencell, a leader in ... biometric technology to industry leaders such as Intel, Jabra, ... validated, biometric wearable products. These products will be showcased ... Las Vegas . "Our ...
(Date:12/11/2014)... and Markets , http://photos.prnewswire.com/prnh/20130307/600769 ... the addition of the "Biometrics Market in the ... One major trend emerging in this market is ... is important to upgrade biometric solutions to the latest ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2
... AGAWAM, Mass., May 13 Microtest Laboratories ... is adding dissolution testing to its current suite of ... services."The addition of dissolution testing ... said Steven Richter, Ph.D., President and Scientific Founder of Microtest ...
... May 20 Validus Technologies Corporation and HierStar ... formed a strategic manufacturing, marketing and distribution alliance ... Time Password (OTP) authentication products to combat cybercrime ... increasing data breaches, which have created a global ...
... scientists have identified two new genes and two new enzymes ... the plants were making monoterpenes, compounds that help give tomato ... the face of accepted thought. Such research could help ... Based on years of research, scientists thought that plants always ...
Cached Biology News:Microtest Labs Adds Dissolution Testing to its Suite of Analytical and Stability Testing Services 2Microtest Labs Adds Dissolution Testing to its Suite of Analytical and Stability Testing Services 3Validus and HierStar Form Strategic Alliance to Offer the First Complete Range of Authentication Products 2Validus and HierStar Form Strategic Alliance to Offer the First Complete Range of Authentication Products 3MSU discoveries upend traditional thinking about how plants make certain compounds 2
...
... Purification with an Affinity Chitin-binding Tag) utilizes ... splicing elements (termed inteins) to purify recombinant ... (Figures 1 and 2). This system distinguishes ... its ability to separate a recombinant protein ...
... Note: The kit contains all the reagents ... of NADPH-cytochrome c reductase activity in cell ... [endoplastic reticulum (ER)]. It has been tested ... as liver, kidney, brain, spleen, and heart ...
... CHEMICON's Skeletal Myogenesis Kit provides the ... myoblasts into mature skeletal myotubes. By ... is a valuable tool in studies ... in developing strategies for muscle cell ...
Biology Products: