Navigation Links
How do you cut a nanotube? Lots of compression
Date:12/17/2010

PROVIDENCE, R.I. [Brown University] A pipefitter knows how to make an exact cut on a metal rod. But it's far harder to imagine getting a precise cut on a carbon nanotube, with a diameter 1/50,000th the thickness of a human hair.

In a paper published this month in the British journal Proceedings of the Royal Society A, researchers at Brown University and in Korea document for the first time how single-walled carbon nanotubes are cut, a finding that could lead to producing more precise, higher-quality nanotubes. Such manufacturing improvements likely would make the nanotubes more attractive for use in automotive, biomedicine, electronics, energy, optics and many other fields.

"We can now design the cutting rate and the diameters we want to cut," said Kyung-Suk Kim, professor of engineering in the School of Engineering at Brown and the corresponding author on the paper.

The basics of carbon nanotube manufacturing are known. Single-atom thin graphene sheets are immersed in solution (usually water), causing them to look like a plate of tangled spaghetti. The jumbled bundle of nanotubes is then blasted by high-intensity sound waves that create cavities (or partial vacuums) in the solution. The bubbles that arise from these cavities expand and collapse so violently that the heat in each bubble's core can reach more than 5,000 degrees Kelvin, close to the temperature on the surface of the sun. Meanwhile, each bubble compresses at an acceleration 100 billion times greater than gravity. Considering the terrific energy involved, it's hardly surprising that the tubes come out at random lengths. Technicians use sieves to get tubes of the desired length. The technique is inexact partly because no one was sure what caused the tubes to fracture.

Materials scientists initially thought the super-hot temperatures caused the nanotubes to tear. A group of German researchers proposed that it was the sonic boomlets caused by collapsing bu
'/>"/>

Contact: Richard Lewis
Richard_Lewis@brown.edu
401-863-3766
Brown University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Osseon™ Treats 1,000 Patients With Osseoplasty™ Procedure for Vertebral Compression Fractures
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
How do you cut a nanotube? Lots of compression
(Date:12/17/2014)... Xeno Diagnostics has again received ... recent COLA inspection. Xeno has met all criteria ... accreditation organization. Accreditation is earned only by laboratories ... operations, demonstrate continued accuracy in the performance of ... survey. , While the Laboratory Excellence ...
(Date:12/17/2014)... 2014  Vermillion, Inc. (NASDAQ: VRML ), ... announced the next step in its expanded strategy to ... with the naming of current Chief Operating Officer, ... while current Chairman of the Board and CEO ... These changes are effective January 1, 2015. ...
(Date:12/17/2014)... , Dec. 17, 2014 Tigercat ... Phase 2 study evaluating the investigational oral NK-1 ... patients with severe, chronic itch who are unresponsive ... care, including topical steroids and antihistamines. ... in Visual Analog Scale (VAS) itch score from ...
(Date:12/15/2014)... PETACH TIKVAH, Israel , Dec. 15, ... BCLI ), a leading developer of adult stem cell ... Brainstorm Cell Therapeutics Ltd. was awarded a grant of ... Office of the Chief Scientist (OCS).  This is the ... grant support from the Office of the Chief Scientist, ...
Breaking Biology Technology:Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 2BrainStorm Receives $1,100,000 for its 8th Annual Non-Dilutive Grant from Israel's Chief Scientist Office 3
... (Becton,Dickinson and Company) (NYSE: BDX ), a global medical ... investor healthcare,conferences:, Bear Stearns 10th Annual London Healthcare ... Time (4:45 a.m. U. S. Eastern Daylight Savings Time), ... 20, 2008 10:15 a.m. Eastern Daylight Savings Time ...
... KNDL ), a,leading, global full-service clinical research organization, ... PharmD, and,President and Chief Operating Officer Chris Bergen ... the company,s common stock over,a designated period. The ... long-term strategy for tax planning and asset diversification ...
... Therapeutics,Inc. (Nasdaq: HALO ), a biopharmaceutical company ... today announced,that it will release financial results for ... after market close on Thursday, March 13, 2008., ... Officer, Gregory Frost,PhD, Vice President and Chief Scientific ...
Cached Biology Technology:Kendle Leaders Adopt 10b5-1 Trading Plans 2Halozyme Therapeutics to Hold Pipeline Update Conference Call on March 14 2
(Date:12/17/2014)... 2014 The Defense Logistics Agency is ... detect and prevent counterfeit microcircuits from entering into ... started performing an in-house microcircuit anti-counterfeit initiative dubbed ... of purchased microcircuits while increasing their reliability throughout ... will be conducted at DLA,s Electronics Product Test ...
(Date:12/17/2014)... , Dec. 16, 2014  Automation is ... this more evident than at international borders. Over ... document scanners have allowed veteran travelers to self ... Passport Control (APC) Kiosks at an increasing number ... globe. According to Maxine ...
(Date:12/11/2014)... SALEM, N.C. , Dec. 10, 2014  That blood ... for quite a while. Hypertension – the medical term for ... in the early 1800s, and the inflatable cuff that,s used ... That doesn,t, however, mean there,s nothing new about hypertension, its ... some long-held beliefs about the condition and the best ways ...
Breaking Biology News(10 mins):Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4
... The biotech industry boosted farming across the globe to ... to 2009, according to the latest analysis published in the ... the increase in net farm income, the farm level benefit ... study,s authors estimate that almost half of that was derived ...
... Md. (Sept. 19, 2011) Dietary salt intake and ... high blood pressure. Each packs its own punch, but when ... than the sum of their individual contributions. Discovering the molecular ... scientists, but research led by Toshiro Fujita, MD, professor and ...
... Bremerhaven, 19 September 2011. Earth warming will presumably not ... South Pacific Ocean. This is the conclusion drawn by ... clam shells and wood from the Antarctic. The growth ... a climate rhythm over the South Pacific during the ...
Cached Biology News:The benefits of biotech 2Abnormal activation of a protein may explain deadly link between high salt intake and obesity 250-million-year-old clam shells provide indications of future of El Nino phenomenon 2
... slides were designed to study protein expression patterns ... Tissue slices from three different species are ... be treated as a single histological slide for ... hybridization. This format allows a rapid analysis ...
... Gene Pulser Xcell microbial system, 100 ... used for electroporation of bacterial and ... main unit, PC module for exponential ... sterile cuvettes (5 each of 0.1 ...
... Soybean-Casein Digest Medium (TSB), USP is ... recommended for general laboratory use. Due to ... Peptone, the medium will support growth of ... serum, etc. , Product conforms to United ...
... (MSTA) slides were designed to study protein expression ... species. Tissue slices from three different species ... then be treated as a single histological slide ... hybridization. This format allows a rapid ...
Biology Products: