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Kettering University Researchers Discover New Way to Produce Nanotubes
Flint - Dec 08, 2003 Nanotubes have thermal conductivity better than diamonds, electro-conductivity better than copper, and can withstand very high temperatures. Researchers at Kettering University have discovered a different method for producing nanotubes, which is one of the U.S. government's best-funded technology areas. Nanotubes are tiny (ranging from 0.8 nanometers to 300 nanometers) structures capable of great things. They have strong planar carbon bonds, high tensile strength, are light and have lots of surface area. Nanotubes can also function as either conductors or semiconductors in electronic circuitry. The Kettering team's procedure for creating nanotubes is "actually a simpler way of doing it than had previously been done," said Bahram Roughani, associate professor of Applied Physics. Established methods include arc discharge, laser ablation or pulsed laser vaporization (PLV), chemical vapor deposition and gas phase processes, such as high-pressure carbon monoxide (HiPCO). Roughani and David Parker, professor of Applied Physics and director of Applied Optics, started the project with students John Henry, Flint, Mich.; Paul Thomas, Tyler, Texas; and Nadia Van Huffel, Grand Rapids, Mich. The Kettering team used a laser but without special environments, just atmospheric pressure at room temperature and silicon carbide wafers, which they exposed to the laser. Most other methods use graphite as a starting substance. To verify their find, they used Raman Spectroscopy, an interaction between laser light and a material that shows the frequency at which the material vibrates. Nanotube research has potential market applications exceeding $230 million within five years. Potential applications include: Building blocks for a ladder to the Space Station - 60,000 miles high to carry cargo and personnel, lowering the cost of putting a satellite into space from $10,000 a pound to $100. Electronics - better quality high-resolution display screens and smaller integrated circuitry for micro-processing. Alternative energy research - Fuel cells need to store large amounts of hydrogen, which requires large amounts of surface area. Hollow carbon nanotubes have large amounts of external and internal surface area. Medical applications - specifically in the internal delivery of drugs and drug therapies. Kettering University is an ABET-accredited engineering and technology university in Flint, Mich., and ranked among the top engineering schools in the nation by "U.S. News & World Report." Community Email This Article Comment On This Article Related Links Kettering University SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express Nano Technology News From SpaceMart.com Computer Chip Architecture, Technology and Manufacture
Water, Water Everywhere Nano
New York (UPI) Mar 18, 2005One of the single biggest applications of nanotechnology could be solving the global shortage of pure water, experts told UPI's Nano World. |
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