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:1/24/2017)... -- It sounds simple and harmless—an electronic sensor attached ... and alerts parents on their smart phones if, ... But pediatric experts argue that such devices may ... of medical benefits, especially to healthy babies. ... of healthy babies, promising peace of mind about ...
(Date:1/21/2017)... Research and Markets has announced the addition ... to their offering. ... The global voice recognition biometrics market to grow at a ... report covers the present scenario and the growth prospects of the ... size, the report considers the revenue generated from the sales of ...
(Date:1/19/2017)... SANTA CLARA, Calif. , Jan. 19, 2017 ... Valley company enhancing user experience and security for ... provider of next-generation payment processing systems and cybersecurity ... assist more banks, enterprises and financial institutions worldwide ... As part of the end-to-end secure user authentication ...
Breaking Biology News(10 mins):
(Date:2/21/2017)... -- Lexus, a returning partner of the Amgen Tour of California ... partner of the men,s and women,s events for the next five ... Tour of California will mark the start ... professional cycling teams in the world racing from Northern to ... Breakaway from Heart Disease TM Women,s Race empowered with ...
(Date:2/21/2017)... Research and Markets has announced the addition of the ... Forecast to 2025" report to their offering. ... The Global Bioplastics & Biopolymers ... over the next decade to reach approximately $8.9 billion by 2025. ... forecasts for all the given segments on global as well as ...
(Date:2/20/2017)... , Feb. 20, 2017 This report analyzes ... the following Product Types: Xylanase, Amylase, Cellulase, and Others. The ... Canada , Japan , ... Latin America , and Rest of World. ... Annual estimates and forecasts are provided for the period 2015 ...
(Date:2/20/2017)... ... February 20, 2017 , ... ... prevent chest wall collapses in pre-term infants with respiratory distress, and assist ... of $600,000 in funding through the ninth round of the University City ...
Breaking Biology Technology: