Navigation Links
A recipe for controlling carbon nanotubes
Date:9/20/2009

CLEVELAND Nanoscopic tubes made of a lattice of carbon just a single atom deep hold promise for delivering medicines directly to a tumor, sensors so keen they detect the arrival or departure of a single electron, a replacement for costly platinum in fuel cells or as energy‐saving transistors and wires.

Single‐walled carbon nanotubes, made of a cheap and abundant material, have so much potential because their function changes when their atomic‐level structure, referred to as chirality, changes.

But for all their promise, building tubes with the right structure has proven a challenge.

A pair of Case Western Reserve University researchers mixed metals commonly used to grow nanotubes and found that the composition of the catalyst can control the chirality.

In a letter to be published Sept. 20 in the online edition of Nature Materials, R. Mohan Sankaran, an assistant professor of chemical engineering at the Case School of Engineering, and Wei‐Hung Chiang, who received his doctorate degree in chemical engineering in May, describe their findings.

"We have established a link between the structure of a catalyst and the chirality of carbon nanotubes," Sankaran said. "Change the catalyst structure by varying its composition, and you can begin to control the chirality of the nanotubes and their electrical and optical properties."

The chirality of a single‐walled carbon nanotube describes how a lattice of carbon atoms is rolled into a tube. The rolling can occur at different angles, producing different structures that exhibit very different properties.

Nanotubes are normally grown in bulk mixtures. When using a nickel catalyst, typically one‐third of those grown are metallic and could be used like metal wires to conduct electricity. About two‐thirds are semiconducting nanotubes, which could be used as transistors, Chiang explained. But, separating them accordi
'/>"/>

Contact: Kevin Mayhood
kevin.mayhood@case.edu
216-534-7183
Case Western Reserve University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. China Biologic Products Completes Acquisition of 90% Controlling Interest in Chongqing Dalin Biologic Technologies Co., Ltd.
2. Light-speed nanotech: Controlling the nature of graphene
3. China Biologic Products Enters Into Agreement to Acquire 90% Controlling Interest in Chongqing Dalin Biologic Technologies Co., Ltd.
4. Controlling the size of nanoclusters
5. Light touch: Controlling the behavior of quantum dots
6. Controlling the size of nanoclusters: First step in making new catalysts
7. ProMetic to obtain controlling stake in Pathogen Removal and Diagnostic Technologies Inc.
8. Gladstone scientists identify role of tiny RNAs in controlling stem cell fate
9. Halocarbon Announces Licensing Agreement with IBM
10. Biopolymers Symposium 2009 Teams with Carbonfund.org to Create a Zero-Carbon Event
11. Ricardo Launches Consortium to Evaluate Lubricant Challenges of Future Low Carbon Engine Technologies
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... Hills, NY (PRWEB) August 29, 2014 ... Burnt Hills Veterinary Hospital are seeking candidates to participate ... dogs with osteoarthritis. The ultimate goal of this ... donor stem cells into one or two arthritically affected ... treated joints. , Candidates for the current investigational ...
(Date:8/29/2014)... Boston, MA, San Antonio, TX (PRWEB) August 29, ... audited, ISO 9001:2008 and ISO 13485:2003 certified, GAMP® ... it has been awarded an international Phase II ... patients with non-Hodgkin’s lymphoma. , Throughout this trial, ... services including, but not limited to, protocol and ...
(Date:8/28/2014)... “This kit has an improved extraction efficiency and provides ... ppb,” said Mark Tess, PhD, Mycotoxin Product Manager for Charm ... and USDA-GIPSA inspection agencies that have a need to detect ... in a matter of minutes with nothing but our equipment ... and grain before accepting it, but they no longer have ...
(Date:8/28/2014)... Willow Grove, PA (PRWEB) August 28, 2014 ... talent, and create a culture that will allow individuals ... that are becoming increasingly important for employers looking to ... life science industries are embracing this trend, as the ... the fabric of a company, which will have real ...
Breaking Biology Technology:Burnt Hills Veterinary Hospital Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2Intrinsic Imaging Awarded Phase II Clinical Trial to Assess New Treatment for Non-Hodgkin’s Lymphoma 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3
... GAITHERSBURG, Md., Nov. 12 MaxCyte, Inc.,the pioneer ... it will be hosting a live discussion with ... assays for drug discovery.,The discussion is open to ... on,Thursday, November 13th from 2:00-3:00EST., One of ...
... Surgery Institute Is ... in Moscow, MOSCOW, Nov. 12 A Vermont eye ... he implanted the,Crystalens HD into a 49 year old Russian ... Randolph, Vermont performed the surgery at the,Ninth International Conference on ...
... Recommendations, BETHLEHEM, Pa., Nov. 12 ... Marketing, Infusion Systems Division and Helen,Chang, PharmD, ... Braun Medical,Inc. (B. Braun), a global leader ... B. Braun at the Institute for Safe ...
Cached Biology Technology:MaxCyte Hosts Live Discussion with Industry Experts on the Challenges in Developing Cell-Based Screening Assays for Drug Discovery 2Vermont Surgeon Implants First Accommodating Crystalens in Russia 2B. Braun Directors Participate at First ISMP National Smart Pump Safety Summit 2B. Braun Directors Participate at First ISMP National Smart Pump Safety Summit 3
(Date:8/28/2014)... FASEB MARC (Maximizing Access to Research Careers) Program ... Society of Human Genetics from October 18 22, ... meant to promote the entry of students, post doctorates ... the basic science community and to encourage the participation ... Genetics. This year MARC conferred 16 awards totaling ...
(Date:8/28/2014)... MD FASEB MARC (Maximizing Access to Research ... for the Genetics Society of America,s 27th Annual ... October 3, 2014 in Pacific Grove, California. ... of students, post doctorates and scientists from underrepresented ... community and to encourage the participation of young ...
(Date:8/28/2014)... Aug. 28, 2014  Privacy Advocate and Senior Staff ... Lynch , joins the lineup of biometric and mobile ... Biometrics UnPlugged Executive Summit in Tampa, Florida ... Previously announced speakers include Steven Rahman, Director, Technology and Strategy ... at Experian. The theme of this year,s event is ...
Breaking Biology News(10 mins):Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2
... Cells trying to keep pace with constantly changing environmental ... their genomic integrity and allowing enough genetic flexibility to ... at the Stowers Institute for Medical Research were able ... unstable, readily acquiring or losing whole chromosomes to enable ...
... today finds that tropical vegetation contains 21 percent more ... remote sensing and field data, scientists from Woods Hole Research ... able to produce the first "wall-to-wall" map (with a spatial ... of forests, shrublands, and savannas in the tropics of Africa, ...
... of rare, endemic species in the Central Andes remain ... climate change, according to a Duke University-led international study. ... particularly vulnerable to changes in the environment or climate. ... percent of the areas with high numbers of these ...
Cached Biology News:That which does not kill yeast makes it stronger 2That which does not kill yeast makes it stronger 3The good news about carbon storage in tropical vegetation 2The good news about carbon storage in tropical vegetation 380 percent of 'irreplaceable' habitats in Andes unprotected 2
... choice of PDMS Stamps (3 PDMS micropatterned ... micron squares or 100 um x 10 ... lines, 3 PDMS nano-patterned stamps with depth ... pitch of 400 nm, or 3 PDMS ...
Request Info...
RECOMBINANT EQUINE IL-4 Product Type: Recombinant Protein...
Request Info...
Biology Products: