Navigation Links
Pure nanotube-type growth edges toward the possible
Date:12/6/2010

New research at Rice University could ultimately show scientists the way to make batches of nanotubes of a single type.

A paper in the online journal Physical Review Letters unveils an elegant formula by Rice University physicist Boris Yakobson and his colleagues that defines the energy of a piece of graphene cut at any angle.

Yakobson, a professor in mechanical engineering and materials science and of chemistry, said this alone is significant because the way graphene handles energy depends upon the angle -- or chirality -- of its edge, and solving that process for odd angles has been extremely challenging. But, he wrote, the research has "profound implications in the context of nanotube growth, offering rational ways to control their chiral symmetry, a tantalizing yet so far elusive goal."

Graphene is the single-atom-thick form of carbon that has become of tremendous interest for its potential to revolutionize electronics, optics, sensing and mechanical devices. Getting a handle on how this chicken-wire-shaped sheet of carbon atoms transports electricity has been the focus of intense study.

A sheet of graphene with zigzag or armchair edges squares up nicely. Zigzags are metallic, armchairs are semiconductors, and their atoms march in rank, evenly spaced, along the edges. A full 30 degrees of rotation separates one from the other.

But if the hexagons that make up a sheet are offset less than 30 degrees, atoms along a straight edge are unevenly spaced. "That makes analysis of the energy very complicated, because it's a large irregular structure. It's like noise," Yakobson said. "We've found a way to calculate the energies in these arbitrary angles," he said.

Yakobson and his co-authors, Yuanyue Liu, a graduate student in his lab, and Alex Dobrinsky, a former graduate student and now a postdoctoral researcher at Brown University, soon wondered how these findings applied to carbon nanotubes.

"T
'/>"/>

Contact: David Ruth
druth@rice.edu
713-348-6327
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Verenium Corporation to Present at Canaccord Adams 28th Annual Global Growth Conference
2. SENOMYX TO WEBCAST CORPORATE PRESENTATION AT THE CANACCORD ADAMS 28TH ANNUAL GLOBAL GROWTH CONFERENCE
3. Bionovo to Present at Canaccord Adams Global Growth Conference
4. Pharmasset to Present at the Canaccord Adams Global Growth Conference on Tuesday, August 12th
5. KJT Group Positions for Substantial Growth
6. Emerging Growth Equities, Ltd. Initiates Coverage of CombiMatrix Corporation with a BUY Rating and an $18.00 Price Target
7. Abaxis, Inc. to Present at the Sidoti & Companys Seventh Annual West Coast Emerging Growth Institutional Investor Forum
8. Filter Markets - Discover the Growth Segments
9. Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts
10. Althea Technologies Secures $12 M Credit Line to Continue Facility Growth and Expansion
11. Tengion Scientists Publish Positive Preclinical Findings With Neo-Organ Demonstrating Long-term Durability and Growth With Skeletal Maturation
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2014)... by researchers from the University of Leicester has ... unlocking the potential to create new materials using ... been published in the prestigious academic journal ... technique to examine in rich detail the structure ... containing an acetylene molecule and a single helium ...
(Date:7/25/2014)... 2014 The Conferee Networking committee is ... Conferee Networking. These two-hour sessions provide a unique networking ... resolve problems, discuss new techniques, or brainstorm new ideas ... a topic for consideration is August 31, 2014, and ... Conferee Networking committee will review the topics, and status ...
(Date:7/25/2014)... 25, 2014 At the request of ... a 60-day extension for the public comment period (Docket ... for Model Aircraft established by Congress as part of ... 60-day extension establishes the new deadline for comments as ... of Transportation/FAA notice published in the Federal Register on ...
(Date:7/24/2014)... (PRWEB) July 24, 2014 Gain ... Global Supply Chain of the biotech industry. Nominations ... Innovation Awards, brought to you by the ... organization of supply chain management professionals for the ... to stakeholders of the Biotech industry – Manufacturers, ...
Breaking Biology Technology:Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster 2Breakthrough laser experiment reveals liquid-like motion of atoms in an ultra-cold cluster 3Pittcon 2015 Announces Call for Topics for Conferee Networking Sessions 2FAA Grants Comment Extension at the Request of AMA 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 2Call for Submission: BSMA’s Supply Chain Management Innovation Awards 3
... Nile Therapeutics,Inc. (OTC Bulletin Board: SPDU.OB), announced ... present at the Biotechnology Industry,Organization (BIO) Investor Forum ... Time at The Palace Hotel in San Francisco, ... and an update on its clinical,development programs, including ...
... Oct. 2 /PRNewswire/ - Respironics, Inc. (Nasdaq:,RESP) today ... outstanding shares,of Apollo Light Systems, Inc., a 20-year-old, ... therapy systems for melatonin suppression and,circadian rhythm sleep ... is located in American Fork, Utah and has ...
... 2 Monitorforhire.com, the,fastest source for hiring ... faster. The company has added a mobile ... immediately to work requests via,PDA or cell ... Freedman, president of monitorforhire.com says that adding ...
Cached Biology Technology:Nile Therapeutics, Inc. to Present at Upcoming BIO Investor Forum 2Nile Therapeutics, Inc. to Present at Upcoming BIO Investor Forum 3Respironics Acquires Apollo Light Systems, Inc., Expands into Circadian Rhythm Device-Based Therapy Market 2Respironics Acquires Apollo Light Systems, Inc., Expands into Circadian Rhythm Device-Based Therapy Market 3
(Date:7/27/2014)... and fungi can evade treatment by acquiring mutations in ... permanent mutations were once thought to be the only ... study has shown that microorganisms can use a temporary ... to gain the benefits of drug resistance without the ... a fungus called Mucor circinelloides, it is likely to ...
(Date:7/27/2014)... In an age of "big data," a single computer ... tasks must instead be distributed across a cluster of ... how Facebook and Google mine your web history to ... Netflix recommend your next favorite book or movie. But ... , New technologies for monitoring brain activity are generating ...
(Date:7/25/2014)... lived on the land now called California, and many ... of plants they used for food, fuel, tools, and ... desired habitat and natural resources. , Frank Lake, an ... will lead a field trip to the ... of America,s 99th Annual Meeting, in Sacramento, Cal. this ...
Breaking Biology News(10 mins):Scientists discover new, noncommittal mechanism of drug resistance 2Scientists discover new, noncommittal mechanism of drug resistance 3New tools help neuroscientists analyze 'big data' 2New tools help neuroscientists analyze 'big data' 3New tools help neuroscientists analyze 'big data' 4New tools help neuroscientists analyze 'big data' 5Fire ecology manipulation by California native cultures 2Fire ecology manipulation by California native cultures 3
... as we grow older, our bones become more brittle and ... of mass is a major reason for older bones fracturing ... on slowing down this loss. However, new research from scientists ... Laboratory (Berkeley Lab) shows that at microscopic dimensions, the age-related ...
... Winston-Salem, N.C. -- New research from Wake Forest ... electronics by developing, for the first time, an ... electrical properties, and inexpensive to produce. ... of physics at Wake Forest, her graduate students ...
... 2011 Neurotechnology , a provider ... the availability of SentiSight 3.0 , a Software ... version adds shape-based recognition and offers enhanced local-feature-based recognition ... also includes enhanced tracking of fast moving objects and ...
Cached Biology News:The brittleness of aging bones -- more than a loss of bone mass 2The brittleness of aging bones -- more than a loss of bone mass 3Flexible electronics hold promise for consumer applications 2SentiSight 3.0 Universal Object Recognition Technology Available Now From Neurotechnology 2SentiSight 3.0 Universal Object Recognition Technology Available Now From Neurotechnology 3SentiSight 3.0 Universal Object Recognition Technology Available Now From Neurotechnology 4
... AviTag E. coli Biotinylation Kit, Plasmid is designed ... E. coli expression kits. (Cat. No. 3 186 ... kit provides vectors for the easy introduction of ... expressed protein can be enzymatically mono-biotinylated by E. ...
... The ubiquitin-proteasome pathway is the major ... eukaryotic cells, where it catalyzes the ... and the rapid elimination of proteins ... 1998; Hochstrasser 1996). The critical protease ...
... technology enables sensitive, fast and specific detection ... Short hybridisation time ( ... chromosome spreads Multiplex capability Available ... Probes available with different labels. ...
... * Source rat ... T25 plated cells $550.00, * ... 120 population doublings, * This ... complete ,growth medium M55007-08 and ...
Biology Products: