Effects of Nanomaterials

Duke Wins $15 Million Grant Renewal to Study Effects of Nanomaterials

Duke researchers developed a hyperspectral imaging technique to help them visualize and survey nanoparticles in water samples. Shown here are specially coated silver nanoparticles floating in mesocosm water (scale - 1 centimeter=

How are nanomaterials affecting the environment—and us? With a new grant renewal, CEINT researchers seek answers

By Karyn Hede

The nanomaterials revolution has made exceedingly tiny engineered particles a hot commodity, used in products from clothing to sunscreen to electronics. But the very properties that make them so useful -- vanishingly small size and high surface area—may have unintended consequences as they enter living organisms and the environment.

A pioneering, multi-institution research center headquartered at Duke's Pratt School of Engineering has just won $15-million grant renewal from the National Science Foundation and the US Environmental Protection Agency to continue learning more about where nanoparticles accumulate, how they interact with other chemicals and how they affect the environment.

Duke researchers developed a hyperspectral imaging technique to help them visualize and survey nanoparticles in water samples. Shown here are specially coated silver nanoparticles floating in mesocosm water (scale - 1 centimeter=250 microns, or 250 millionths of a meter). The average diameter of the nanoparticles is 55 nanometers, or 55 billionths of a meter, but variations in size cause them to reflect different colors as shown in the image. Credit - Appala Raju Badireddy

Located in Duke Forest, these mesocosms serve as a living laboratory for researchers studying how nanoparticles affect the environment. Credit - Benjamin Espinasse“The previous focus has been on studying simple, uniform nanomaterials in simple environments, ” said Mark Wiesner, James L. Meriam Professor of Civil & Environmental Engineering and director of CEINT. “As we look to the next five years, we envision a dramatically different landscape. We will be evaluating more complex nanomaterials in more realistic natural environments such as agricultural lands and water treatment systems where these materials are likely to be found.”

When CEINT formed, little research had been done on how materials manufactured at the nanoscale—about 1/10, 000th the diameter of a human hair—enter the environment and whether their size and unique properties render them a new category of environmental risk. For example, nanoparticles can be highly reactive with other chemicals in the environment and had been shown to disrupt activities in living organisms. Indeed, nanosilver is used in clothing precisely because it effectively kills odor-causing bacteria.

LAP LAMBERT Academic Publishing Deformed helix ferroelectric liquid crystals: Materials for displays: Effect of nano-materials on electro-optical properties of deformed helix ferroelectric liquid crystals and applications
Book (LAP LAMBERT Academic Publishing)

Nano mercury

by -tranversive_dude-

Nanomaterial hazard
Preliminary research by a team of ASU scientists suggests the presence of nanomaterials in drinking water may be dangerous to humans. Two of the researchers – principal investigator Paul Westerhoff and civil and environmental engineering professor John Crittenden – caution against drawing conclusions from these preliminary results, but they say initial results indicate that certain nanomaterials in water may be toxic.
In the project, the research team simulated liquid found in intestines and introduced into it a layer of colon cells

Contrast Media/Contrast Agents Market (Radiology, Interventional Radiology ..  — PR Web

Springer IUTAM Symposium on Surface Effects in the Mechanics of Nanomaterials and Heterostructures: Proceedings of the IUTAM Symposium held in Beijing, China, 8-12 August, 2010 (IUTAM Bookseries (closed))
Book (Springer)
Interfacial Effects and Novel Properties of Nanomaterials (Solid State Phenomena)
Book (Scitec Publications, Ltd.)
Springer Nanomaterials: Mechanics and Mechanisms
Book (Springer)
Springer Nanomaterials: A Danger or a Promise?: A Chemical and Biological Perspective
eBooks (Springer)
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