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:6/29/2015)... , June 29, 2015 ... and medical information products and services, today announced the ... According to the 2014 Journal Citation Reports® (JCR) published ... Impact Factors increase from 2013 to 2014, ahead of ... occupied the top rank in 62 subject categories, up ...
(Date:6/26/2015)...  A San Francisco company, Pembient, recently announced it ... horn: beer in China and ... response to the emerging industry, two leading rhino conservation ... synthetic rhino horn.  The International ... International (SRI) released a joint statement ...
(Date:6/26/2015)... The report "Biolubricants Market by Type (Vegetable ... oils, Mold Release Agents), End Use (Industrial, Commercial Transport, ... Forecasts to 2020" published by MarketsandMarkets, The Biolubricants Market ... a CAGR of 6.27% between 2015 and 2020. ... 66 Figures spread through 170 Pages and in-depth TOC ...
(Date:6/25/2015)... ... June 25, 2015 , ... ... speakers for its 2015 National Patient and Family Conference, Providing and Pursuing Answers: ... at the Renaissance Chicago O’Hare Suites Hotel, July 24-25, 2015. , “As advances ...
Breaking Biology Technology:Elsevier Announces 2014 Citation Impact Highlights 2Elsevier Announces 2014 Citation Impact Highlights 3Rhino Experts Oppose Synthetic Rhino Horn as Solution to Poaching Crisis 2Biolubricants Market Worth $2,972.13 Million by 2020 2Biolubricants Market Worth $2,972.13 Million by 2020 3Nationally Recognized Brain Tumor Experts to Speak at American Brain Tumor Association Patient and Family Conference 2
... NEW YORK, Aug. 1, 2011 /PRNewswire-Asia-FirstCall/ -- American Oriental ... or "AOBO"), a pharmaceutical company dedicated to improving health ... range of prescription and over the counter ("OTC") products, ... 2011 financial results on Tuesday, August 9, 2011, after ...
... Researchers have developed a toolkit that enables them to ... Led by Susan Dymecki, a professor of ... serotonin-producing neurons, observing how mice behave in a normal ... While their findings affirm earlier studies, the researchers used ...
... When normal proteins form protein clumps in the body, ... "amyloids," are closely associated with Alzheimer,s disease and type ... knew how these proteins form clumps, then they might ... The physicist Adrian Keller and his colleagues at the ...
Cached Biology Technology:American Oriental Bioengineering to Announce Second Quarter 2011 Financial Results on August 9, 2011 2Researchers target, switch off serotonin-producing neurons in mice 2Researchers target, switch off serotonin-producing neurons in mice 3In the pursuit of dangerous clumps 2In the pursuit of dangerous clumps 3
(Date:6/18/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market announces that its Wocket® smart wallet will be ... Mark", scheduled to air on WABC Radio (am770) in ... The broadcast air- time for the extensive ... NXT-ID, Inc.,s CEO Gino Pereira will be discussing ...
(Date:6/17/2015)... GERMANTOWN, Maryland , and HILDEN, Germany ... (NASDAQ: QGEN ; Frankfurt Prime Standard: QIA) today launched ... DNA evidence in forensic laboratories in the United ... integrated solution to simultaneously analyze multiple key genomic markers (short ... Investigator ® Quality Sensor to evaluate the quality of ...
(Date:6/17/2015)... Fla. , June 17, 2015  Crossmatch™, ... today announced that its U.are.U ® 4500 ... Togo,s Eateries, Inc., a ... sandwich chain, to increase security, improve accountability and ... readers enable instant, non-repudiable identity confirmation for employee ...
Breaking Biology News(10 mins):NXT-ID, Inc.'s CEO Gino Pereira Talks About the Wocket Smart Wallet on WABC Radio, New York City, June 20th 2NXT-ID, Inc.'s CEO Gino Pereira Talks About the Wocket Smart Wallet on WABC Radio, New York City, June 20th 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 2QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 4QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 5Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 2Togo's Eateries Improve Security and Accountability with Crossmatch Fingerprint Readers 3
... Sildenafil and other "impotence drugs" that boost the production of ... an erection now also show promise in unmasking cancer cells ... say scientists at the Johns Hopkins Kimmel Cancer Center. , ... tumors showed that tumor size decreased two- and threefold in ...
... many as 18 percent of adults who have no history ... stroke, according to results of a large national study published ... one of the JAMA/Archives journals. , Using brain imaging to ... have had an undiagnosed or silent stroke, according to background ...
... in imaging software and machinery, also known as a 64-slice ... and accurate means of tracking blood that has been slowed ... it took them less than half the time of exercise ... warning of vessels more likely to become blocked and cause ...
Cached Biology News:'Erectile dysfunction' drugs heighten natural anti-cancer activity 2Stroke symptoms common among general population 2Fast test for low blood flow in dogs detects early heart trouble 2Fast test for low blood flow in dogs detects early heart trouble 3Fast test for low blood flow in dogs detects early heart trouble 4
Identify and characterize Phosphoinositide (PI(4,5)P2) binding...
Recommended fro Western blotting application...
... Immunogen corresponds to amino acids 2-105 ... has been successfully used in Western blot, ... blot, this antibody detects an ~ 60 ... has also been used in immunoprecipitation and ...
... KLF15 is a Cys2-His2 zinc finger gene. ... liver, kidneys, heart, and skeletal muscle. ... produced in rabbits immunized with a synthetic ... KLF15 with an internal ID of P03590 ...
Biology Products: