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

here are as many ways to roll graphene into a nanotube as there are ways to roll a newspaper," Yakobson said. "The text can be aligned circumferentially or run straight along the axis or spiral at an angle."

While rolling a newspaper makes it hard to read, rolling carbon into a nanotube makes it relatively easy to "read" its type -- whether armchair or zigzag or some variation in between. What's impossible is controlling how the tube will roll. The process tends to be willy-nilly, leaving researchers the task of separating the nanotubes they need from the bulk through ultracentrifugation or other expensive procedures.

Yakobson said it would be a real game-changer if they could, for instance, grow batches of pure armchair nanotubes for use in such projects as armchair quantum nanowire (AQW). As imagined by Rice's late Nobel Laureate Richard Smalley, AQW could revolutionize the nation's power grid by carrying 10 times the amount of electricity as copper at only one-sixth the weight.

Yakobson's work may open a path to do so. A nanotube's chirality is determined by the combination of energies at play in its nucleation. "When it just emerges from the 'primordial soup' of carbon, the edge of the tube is essentially the same as the edge of graphene," he said.

"At first, it's just a cap. There's no stem yet. You're frying these caps on a skillet, and they're bubbling," he said. "The probability for different bubbles to emerge is controlled by energy around the edge."

The chirality of the nascent nanotube is set when atoms in the cap self-assemble a sixth pentagon (necessary to mold the hexagons into a dome). "That's where we can, I think for the first time, make some quantitative judgment about how different chiral structures emerge," Yakobson said.

It may be worth chemists' efforts to look more closely at the energy between the catalyst and carbon structure. "This has some promise," he said. "If you can tweak this pref
'/>"/>

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:8/22/2014)... Texas (PRWEB) August 22, 2014 The ... and in-depth study on the current state of the ... report provides a basic overview of the industry, including ... and Chinese domestic market analysis are provided with a ... the market. A comparison between the international and Chinese ...
(Date:8/22/2014)... The identification of protein-coding variants ... accelerated by exome sequencing. Built on Roche NimbleGen’s ... SeqCap EZ Developer system has been a proven ... additionally present how he achieved coverage statistics similar ... mouse exome kits. With over 236,000 SNPs and ...
(Date:8/21/2014)... scientists has observed tiny quantum vortices in cold droplets ... Science that the exotic vortices arrange themselves ... the first time that the quantum vortices, which have ... known as superfluid helium, have been detected in nanodroplets. ... Vilesov of the University of Southern California, one of ...
(Date:8/21/2014)... August 21, 2014 The College of ... private college in the Mid-Hudson Region to be designated ... begin accepting applications from qualified “high-technology” businesses that align ... very pleased to have been selected for the START-UP ... transformative initiative to stimulate economic development in New York ...
Breaking Biology Technology:Diabetes Drugs Industry Growth Analysis in Global, China Regions Research Report Available at DeepResearchReports.com 2Diabetes Drugs Industry Growth Analysis in Global, China Regions Research Report Available at DeepResearchReports.com 3Efficient Identification of Protein-Coding Variants in a Model Organism Through Exome Sequencing, New Webinar Hosted by Xtalks 2Scientists observe quantum vortices in cold helium droplets 2The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 2The College of New Rochelle Becomes First Private College in Mid-Hudson Region to Earn START-UP NY Designation 3
... Ability to Elicit Long-Lasting Tumor Protection In Vivo; Lead ... ... Cancer and/or HIV -, SAN DIEGO, CA, Sept. 24 ... vivo results of its lead therapeutic vaccine candidate for the ...
... availability of ... bone fracture screening, TORONTO, ... in health and wellness solutions, announced,they are developing components for ... assessment. In conjunction with top researchers at Toronto,s University ...
... BIRMINGHAM, Ala., Sept. 24 BioCryst,Pharmaceuticals, Inc. (Nasdaq: ... at the,UBS 2007 Global Life Sciences Conference in ... for Tuesday, September 25, 2007 at 2:00 p.m. ... http://www.biocryst.com . The,presentation will be archived for ...
Cached Biology Technology:Nventa announces publication of HspE7 data 2Nventa announces publication of HspE7 data 3Nventa announces publication of HspE7 data 4Nventa announces publication of HspE7 data 5Cooler Solutions and Leading Research Hospital to Design Revolutionary Osteoporosis Diagnosis Device 2BioCryst to Present at UBS 2007 Global Life Sciences Conference 2BioCryst to Present at UBS 2007 Global Life Sciences Conference 3
(Date:8/21/2014)... in near darkness use a previously unknown process for ... team led by a Penn State University scientist has ... aimed at improving plant growth, harvesting energy from the ... on Lake Erie and other lakes worldwide. A paper ... Science Express edition of the journal Science ...
(Date:8/21/2014)... fungus linked to dandruff, eczema and other itchy, flaky ... further global reachesincluding Hawaiian coral reefs and the extreme ... A review in the scientific journal PLOS Pathogens ... fungi of the genus Malassezia in light ... from around the world. , University of Hawai,i at ...
(Date:8/21/2014)... food intake, health and quality of life of older ... at the University of Waterloo receiving close to $1.5 ... Research (CIHR). , Professor Heather Keller, of the ... Schlegel research chair in nutrition and aging, will receive ... living in long-term care homes are poorly nourished. The ...
Breaking Biology News(10 mins):Hot-spring bacteria reveal ability to use far-red light for photosynthesis 2Hot-spring bacteria reveal ability to use far-red light for photosynthesis 3From dandruff to deep sea vents, an ecologically hyper-diverse fungus 2Grants will fund landmark aging research at Waterloo 2
... Gulf War Illness (GWI)the chronic health condition that affects about ... to be the result of several factors, which differed in ... war, according to a Baylor University study. , ... , the study investigated links between GWI and veterans, locations ...
... person or set of identical twins. That makes them ... to international travel. But what happens when the tips ... ridges? It,s not the premise for a ... adermatoglyphia. It,s also known as "Immigration Delay Disease," because ...
... milk, a secretion from the crops of parent birds, is ... in flamingos and male emperor penguins. Essential for the growth ... produced by both parents from fluid-filled cells lining the crop ... BioMed Central,s open access journal BMC Genomics uses new technology ...
Cached Biology News:Causes of Gulf War Illness are complex and vary by deployment area -- Baylor University study 2Causes of Gulf War Illness are complex and vary by deployment area -- Baylor University study 3Shake hands with the invisible man 2Milking the pigeon: extracting the mechanisms involved 2
...
... Conjugated peptides or recombinant proteins are ... produce antibodies in 2 rabbits. pre-immune and ... test until the titer reaches 1:4,000 Western ... Protein G purification Antibodies are eluted using ...
Immunogen: Synthetic peptide (aa sequence is considered to be commercially sensitive) Storage: -20 C, Avoid Freeze/Thaw Cycles...
...
Biology Products: