Contact: Michael Woods
American Chemical Society
Caption: Real-world tornadoes form (top) in association with deep moist convection and other atmospheric conditions. As an analogue to that cloud, the image (bottom) shows a nanocrystalline igloo grown from nanospheres in a water drop evaporating from a Petri dish. The circular patterns (arrow) consist of nanospheres arranged by microtornado vortexes.
Credit: Photos Courtesy of Andrei P. Sommer
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Related news release: ACS News Service Weekly PressPac -- May 9, 2007