- About Us
- Career Center
- Nano-Social Network
- Nano Consulting
- My Account
Research Offers Clues About C60 Behavior in Natural Environments
In some of the first research to probe how
buckyballs will interact with natural ecosystems, Rice University's Center
for Biological and Environmental Nanotechnology finds that the molecules
spontaneously clump together upon contact with water, forming nanoparticles
that are both soluble and toxic to bacteria.
The research challenges conventional wisdom: since buckyballs are notoriously insoluble by themselves, most scientists had assumed they would remain insoluble in nature. The findings also raise questions about how the buckyball aggregates - dubbed nano-C60 - will interact with other particles and living things in natural ecosystems.
The findings appear in the June 1 issue of the journal Environmental Science & Technology.
"The fact that nano-C60 dissolves in water raises questions about water as a vector for the movement of these types of materials," said Vicki Colvin, CBEN director, professor of chemistry and a co-author on the study.
Buckyballs are soccer ball-shaped molecules of 60 carbon atoms that were discovered at Rice in 1985. While a few companies are already using trace amounts of buckyballs in products, large-scale production of buckyballs is still a year or two away. Ultimately, companies hope to use buckyballs in everything from pharmaceuticals to sporting goods.
The research team was led by Georgia Tech environmental engineer Joseph Hughes and included almost a dozen Rice collaborators. They found that nano-C60 readily dissolves in water. The clumps, which measured between 25 and 500 nanometers in diameter, were also found to persist for up to 15 weeks in freshwater.
The researchers also exposed nano-C60 to two common types of soil bacteria. They found the particles inhibited both the growth and respiration of the bacteria at very low concentrations - as little as 0.5 parts per million.
"The antibacterial properties of the C60 aggregates also raise some interesting questions," said Colvin. "We think it may be possible to harness those properties for good applications, but we also advocate continued research on the potentially negative effects that these materials could have on the health of natural ecosystems."
Hughes, the study's lead author, said scientists don't yet know enough to accurately predict what impact buckyballs will have on the environment or in living systems, but he said the findings do illustrate the shortcomings of federal guidelines for the handling and disposal of buckyballs, which are subject to the same regulations as bulk carbon black.
"Not all carbon is the same," said Hughes. "Graphite and diamonds are both bulk carbon, for example, but current standards call for handling them in completely different ways. Our results suggest buckyballs also should be handled differently."
Other Rice collaborators include CBEN Executive Director Kevin Ausman; Jane Tao, assistant professor of biochemistry and cell biology; Wenhua Guo, research scientist; Lawrence Alemany, senior research scientist; and graduate students J.D. Fortner, D. Y. Lyon, C.M. Sayes, A.M. Boyd, J.C. Falkner and E.M. Hotze.
About Rice University:
Rice University is consistently ranked one of America's best teaching and research universities. It is distinguished by its: size - 2,850 undergraduates and 1,950 graduate students; selectivity -10 applicants for each place in the freshman class; resources‹an undergraduate student-to-faculty ratio of 6-to-1, and the fifth largest endowment per student among American universities; residential college system, which builds communities that are both close-knit and diverse; and collaborative culture, which crosses disciplines, integrates teaching and research, and intermingles undergraduate and graduate work. Rice's wooded campus is located in the nation's fourth largest city and on America's South Coast.
For additional information, visit www.rice.edu
Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.
|Related News Press|
Preparing for Nano
Searching for a nanotech self-organizing principle May 1st, 2016
Nanotechnology is changing everything from medicine to self-healing buildings: Nanotechnology is so small it's measured in billionths of metres, and it is revolutionising every aspect of our lives April 2nd, 2016
Durnham University's DEEPEN project comes to a close September 26th, 2012
Technical Seminar at ANFoS 2012 August 22nd, 2012
Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016
Chains of nanogold – forged with atomic precision September 23rd, 2016
Fighting cancer with sticky nanoparticles September 27th, 2016
UNAM develops successful nano edible coating which increases life food September 27th, 2016
Coffee-infused foam removes lead from contaminated water September 21st, 2016
Mathematical nanotoxicoproteomics: Quantitative characterization of effects of multi-walled carbon nanotubes: This research article by Dr. Subhash Basak et al. will be published in Current Computer-Aided Drug Design, Volume 12, 2016 September 2nd, 2016
Nanofur for oil spill cleanup: Materials researchers learn from aquatic ferns: Hairy plant leaves are highly oil-absorbing / publication in bioinspiration & biomimetics / video on absorption capacity August 25th, 2016
Researchers watch catalysts at work August 19th, 2016