Nanotube Safety (broadcast Friday, May 23rd, 2008)

These spaghetti-like structures are carbon nanotubes viewed under an electron microscope. Photo by Anastasios John Hart
Carbon nanotubes are one of the leading-edge ingredients of the nanotech revolution. The tiny, cylindrical tubes made of a lattice of carbon atoms have potential as strengthening fillers in products such as tennis racket handles and brake pads. At a higher level, the tubes are being considered for use in electronic devices such as display screens or as ultra-small wiring in computer chips. Writing in the journal Nature Nanotechnology, however, a group of researchers waves a cautionary flag.
The team found that when injected into the body cavities of mice, long carbon nanotubes could behave in a way similar to the way asbestos fibers behave, forming lesions that, in the case of asbestos, lead to cancer. Shorter nanotubes did not seem to have the potentially dangerous effect, and it's not known whether the tubes can make their way to the mesothelium if inhaled. "This is of considerable importance, because research and business communities continue to invest heavily in carbon nanotubes for a wide range of products under the assumption that they are no more hazardous than graphite," wrote the scientists. In this segment, we'll talk about what is known about the potential health effects of these and other nanomaterials, and what steps should be taken now to prevent future asbestos-like environmental and health problems.
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Guests
Vicki Colvin
Executive director of ICON - The International
Council on Nanotechnology
Professor of Chemistry and Professor
of Chemical Engineering
Rice University
Houston, Texas
Andrew Maynard
Chief Science Advisor, Project on
Emerging Nanotechnologies
Woodrow Wilson International Center for
Scholars
Washington, DC
Related Links
- Science News: Asbestos-Like Nanotubes
- Washingtonpost.com: Effects of Nanotubes May Lead to Cancer, Study Says
- NY Times: In Study, Researchers Find Nanotubes May Pose Health Risks Similar to Asbestos
- BBC News: 'Asbestos warning' on nanotubes
- Multi-walled Carbon Nanotubes and Mesothelioma: An ICON Backgrounder
- Andrew Maynard: Carbon nanotubes: the new asbestos? Not if we act fast.
Segment produced by:Charles Bergquist
Listen:
Stories for
Friday, May 23rd, 2008
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