Printer Friendly

Cooking up carbon doughnuts.

First, there were buckyballs-molecules made up of carbon atoms arranged into closed spheres. Then came buckytubes-buckyballs with elongated waists forming cylindrical carbon tubes sealed at both ends. Buckytubes, in turn, could line up side by side to form bundles, or ropes.

Daniel T. Colbert of Rice University in Houston and his coworkers have now found, amid the tangled mass of buckytubes and ropes typically produced from carbon vapor, doughnut-shaped rings of carbon atoms. Such rings apparently result when the ends of a growing nanotube meet and fuse.

Carbon doughnuts show up regularly in electron micrographs and scanning force microscope images of laser-grown carbon nanotube material. "We see these perfect circles nearly every time we look," says Rice's Richard E. Smalley. Ring diameters typically range from 300 to 500 nanometers.
COPYRIGHT 1997 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1997, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

 Reader Opinion

Title:

Comment:



 

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:discovery of doughnut-shaped rings of carbon atoms
Author:Peterson, Ivars
Publication:Science News
Article Type:Brief Article
Date:Mar 29, 1997
Words:129
Previous Article:Particle tracking and liquid flow.
Next Article:Probing atomic migration in thin wires.
Topics:


Related Articles
Spiraling fullerene.
Filling and fathoming fullerene molecules.
Theorists design new-look fullerenes.
Boron molecules that look like fullerenes.
Simulated fullerene tubules act as straws.
Molecular tools for nanomanufacturing.
Fullerene-like molecules without carbon.
Wrapping carbon into superstrong tubes.
Collapsing clusters lead to fullerenes.
Chemists decorate nanotubes for usefulness.

Terms of use | Copyright © 2014 Farlex, Inc. | Feedback | For webmasters