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:2/21/2017)... PORTLAND, Ore. , Feb. 22, 2017 /PRNewswire/ ... of Companies (Avamere Health Services, Infinity Rehab, Signature Hospice, ... study that will apply the power of IBM cognitive ... and health centers. By analyzing data streaming from sensors ... into physical and environmental conditions, and obtain deeper learnings ...
(Date:2/16/2017)... SAN FRANCISCO , Feb. 16, 2017 /PRNewswire/ ... research, today announced that it has received Laboratory ... The CAP Accreditation is presented to laboratories that ... and who demonstrate scientifically rigorous processes. ... of excellence in laboratory practices. We,re honored to ...
(Date:2/13/2017)... 2017  RSA Conference -- RSA, a Dell Technologies ... to enhance fraud detection and investigation across digital ... Fraud & Risk Intelligence Suite. The new platform ... insights from internal and external sources as well ... customers from targeted cybercrime attacks. "Fraudsters ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... SAN FRANCISCO , Feb. 23, 2017 /PRNewswire/ ... and Beyond Type 1, a not-for-profit advocacy and education ... announced a grant from Beyond Type 1 to support ... 1 and other insulin-requiring diabetes.  For ... stem cell-derived cell replacement therapies with a focus on ...
(Date:2/22/2017)... ... February 22, 2017 , ... Park Systems , a leader in Atomic ... all SPIE attendees and Park customers on Feb. 27, 2017 from 12-2pm ... Jose Convention Center. The luncheon will feature a talk on Automated AFM for ...
(Date:2/22/2017)... ... 22, 2017 , ... ProMIS Neurosciences (“ProMIS” or the “Company”), ... today announced it has issued a scientific white paper entitled “Results from recent ... of commentaries from ProMIS’s scientific team offering insight into the Company’s product portfolio ...
(Date:2/22/2017)... DES MOINES, Iowa , Feb. 22, 2017 Origin ... an agricultural biotechnology trait and seed provider, and Arcadia ... -based company that develops and commercializes agricultural productivity traits and ... of a key corn biotechnology product developed in China ... completion of global regulatory trials. ...
Breaking Biology Technology: