Navigation Links
The longest carbon nanotubes you've ever seen

Using techniques that could revolutionize manufacturing for certain materials, researchers have grown carbon nanotubes that are the longest in the world. While still slightly less than 2 centimeters long, each nanotube is 900,000 times longer than its diameter.

The fibers--which have the potential to be longer, stronger and better conductors of electricity than copper and many other materials--could ultimately find use in smart fabrics, sensors and a host of other applications.

To grow the aligned bundles of tiny tubes, the researchers combined advantages of chemical vapor deposition (CVD), a technique for creating thin coatings that is especially common in the semiconductor industry, with a novel substrate and catalyst onto which the carbon attaches.

Supported by the National Science Foundation (NSF) and the Office of Naval Research, University of Cincinnati (UC) professors Vesselin Shanov and Mark Schulz collaborated with post-doctoral researcher Yun Yeo Heung and students to develop the technique.

The researchers partnered with First Nano, a division of CVD Equipment Corp. of Ronkonkoma, N.Y., to use their laboratory and a specialized furnace called the EasyTube 3000. With the equipment, the researchers were able to break apart hydrocarbons to create a vapor of carbon-atom starting material. Within the vapor sat the new substrate--a catalyst made of alternating metal and ceramic layers atop an oxidized-silicon wafer base--which served as the foundation for growth.

"This process is revolutionary because it allows us to keep the catalyst 'alive' for a long period of time thus, providing fast and continuous transport of the carbon 'building blocks' to the carbon nanotube growth zone," said Shanov.

The carbon nanotubes are extremely long compared to predecessors--the longest is 3 millimeters beyond the prior world record. More important for manufacturing, the research team grew a 12-millimeters-thick, uniform c arpet of aligned carbon nanotubes on a roughly 10-centimeter silicon substrate, opening the door for scaling-up the process.

The inventions were presented in April 2007 at the Single Wall Carbon Nanotube Nucleation and Growth Mechanisms workshop organized by NASA and Rice University. The research was supported by NSF grant 0510823, in addition to support from the Office of Naval Research through North Carolina A&T SU.


'"/>

Source:National Science Foundation


Related biology news :

1. Deep sea algae connect ancient climate, carbon dioxide and vegetation
2. Microbe has huge role in ocean life, carbon cycle
3. Marine bacterium suspected to play role in global carbon and nitrogen cycles
4. High carbon dioxide levels spur Southern pines to grow more needles
5. Field tested: Grasslands wont help buffer climate change as carbon dioxide levels rise
6. Modifications render carbon nanotubes nontoxic
7. Climate change will affect carbon sequestration in oceans, model shows
8. Storing carbon to combat global warming may cause other environmental problems, study suggests
9. Bugs expose underground carbon traffic system 10 times more important than fossil fuel burning
10. Of mice, men, trees and the global carbon cycle
11. Higher carbon dioxide, lack of nitrogen limit plant growth
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... -- On April 6-7, 2017, Sequencing.com will host the world,s ... at Microsoft,s headquarters in Redmond, Washington ... health and wellness apps that provide a unique, personalized ... is the first hackathon for personal genomics and the ... the genomics, tech and health industries are sending teams ...
(Date:3/29/2017)... 2017  higi, the health IT company that operates ... America , today announced a Series B investment ... EveryMove. The new investment and acquisition accelerates higi,s strategy ... transform population health activities through the collection and workflow ... higi collects and secures data today on behalf of ...
(Date:3/24/2017)... The Controller General of Immigration from Maldives Mr. ... have received the prestigious international IAIR Award for the most innovative ... ... Maldives Immigration ... Algeen (small picture on the right) have received the IAIR award for ...
Breaking Biology News(10 mins):
(Date:9/25/2017)... (PRWEB) , ... September 25, 2017 , ... ... determined by a third-party auditor, MindFlow Design has been found to provide ... "Whether start-ups or Fortune 500 companies, our clients have a lot ...
(Date:9/22/2017)... ... September 22, 2017 , ... The Academy of ... October 28 and 29, 2017, to promote AMA’s programs, member services, and the ... different hobbies, including but not limited to model aviation and other RC activities. ...
(Date:9/21/2017)... ... September 21, 2017 , ... ... portal. Each relaunch of the portal includes new features that facilitate streamlined and ... companies seek to remain at the forefront of medical advancements, they rely on ...
(Date:9/21/2017)... ... September 21, 2017 , ... ... the election of Paul Hermes, Entrepreneur in Residence at Medtronic, Inc., to serve ... developed a proprietary, tissue-engineered scaffold for anterior cruciate ligament (ACL) reconstruction that is ...
Breaking Biology Technology: