Featured Research

from universities, journals, and other organizations

Rice Research Yields "Designer" Carbon Nanotubesl Addition Of Fluorine Opens Door To Hundreds Of Nanotube Derivatives

Date:
April 12, 2002
Source:
Rice University
Summary:
Researchers at Rice University say fluorine -- the most reactive element in nature -- could prove to be a key in unlocking the potential of carbon nanotubes and other carbon nanostructures.

HOUSTON—APRIL 8, 2002 — Researchers at Rice University say fluorine -- the most reactive element in nature -- could prove to be a key in unlocking the potential of carbon nanotubes and other carbon nanostructures.

Rice chemists are presenting research at this week’s annual meeting of the American Chemical Society in Orlando, Fla., that describes groundbreaking work in the fluorination of polyfullerenes, groupings of C-60 molecules that have been joined together in polymer chains and planes. Polyfullerenes are much more stable than organic polymers like polyethylene, polypropylene or nylon, and the addition of fluorine to the polyfullerenes could make it easier for chemists to use them in subsequent chemical reactions.

The Rice research is a collaboration with scientists at the Russian Academy of Science’s Institute for High-pressure Physics near Moscow. The Russian researchers – Dr. V. A. Davydov and co-workers - created the polymeric fullerenes using a process involving temperatures up to 500 Celsius, and pressures up to 60,000 atmospheres. At Rice, researchers – Faculty Fellow Valery Khabashesku and Graduate Student Zhenning Gu - fluorinate the polyfullerenes, using techniques pioneered over the past three years in the fluorination of carbon nanotubes.

"Compared to other methods of forming derivatives of carbon nanostructures, fluorination leads to reactions that are more general in nature and more easily extrapolated to a macro or production scale," said John Margrave, Butcher Professor of Chemistry.

Since their discovery in 1991, scientists have speculated that carbon nanotubes could be used for everything from biological probes small enough to penetrate a living cell to wires in computer chips that are 100 times smaller than anything available with today’s technology.

But carbon nanotubes are also inert and chemically stable, which has made it difficult for chemists to create nanotube derivatives -- tubes decorated with extra molecules that act as chemical "handles" for further manipulation. Most processes that laboratory researchers have used to create nanotube derivatives are impractical on a macro scale because they involve the use of extremely high temperatures, high pressures or other techniques that are difficult to reproduce in a production setting.

Fluorine, which is often shunned by chemists because of its highly reactive nature, has proven to be very useful as an alternative means of creating nanotube derivatives, precisely for that reason. The addition of fluorine opens the door to subsequent chemical reactions, giving chemists the ability to attach other types of molecules to nanotubes.

So far, Margrave and his colleagues have used this process to create dozens of "designer" nanotube derivatives. These include hydrotubes, which contain hydrogen in an activated form; hexyl nanotubes, methoxy nanotubes, amido nanotubes, and other varieties containing organic side chains; polymers similar to nylon; and hydrogen-bonded nylon analogs. Unlike pure carbon nanotubes, all these derivatives are soluble in traditional organic solvents.

Potential applications for the nanotube derivatives are still being identified, but hydrotubes, which contain hydrogen in an activated form, might find a use as an ultra efficient fuel, and silicate-coated nanotubes could be used in nanoscale electronic devices.

Margrave’s work is sponsored by grants from the Welch Foundation and the Texas Advanced Technology Program.


Story Source:

The above story is based on materials provided by Rice University. Note: Materials may be edited for content and length.


Cite This Page:

Rice University. "Rice Research Yields "Designer" Carbon Nanotubesl Addition Of Fluorine Opens Door To Hundreds Of Nanotube Derivatives." ScienceDaily. ScienceDaily, 12 April 2002. <www.sciencedaily.com/releases/2002/04/020412081030.htm>.
Rice University. (2002, April 12). Rice Research Yields "Designer" Carbon Nanotubesl Addition Of Fluorine Opens Door To Hundreds Of Nanotube Derivatives. ScienceDaily. Retrieved July 26, 2014 from www.sciencedaily.com/releases/2002/04/020412081030.htm
Rice University. "Rice Research Yields "Designer" Carbon Nanotubesl Addition Of Fluorine Opens Door To Hundreds Of Nanotube Derivatives." ScienceDaily. www.sciencedaily.com/releases/2002/04/020412081030.htm (accessed July 26, 2014).

Share This




More Matter & Energy News

Saturday, July 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Europe's Highest Train Turns 80 in French Pyrenees

Europe's Highest Train Turns 80 in French Pyrenees

AFP (July 25, 2014) Europe's highest train, the little train of Artouste in the French Pyrenees, celebrates its 80th birthday. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins