October 19, 2010
Breakthrough In Nanocrystal Growth
For the first time scientists have been able to watch nanoparticles grow from the earliest stages of their formation. Nanoparticles are the foundation of nanotechnology and their performance depends on their structure, composition, and size. Researchers will now be able to develop ways to control conditions under which they are grown. The breakthrough will affect a wide range of applications including solar-cell technology and chemical and biological sensors. The research is published in NANOLetters.
As coauthor Wenge Yang of the Carnegie Institution's Geophysical Laboratory explained: "It's been very difficult to watch these tiny particles be born and grow in the past because traditional techniques require that the sample be in a vacuum and many nanoparticles are grown in a metal-conducting liquid. So we have not been able to see how different conditions affect the particles, much less understand how we can tweak the conditions to get a desired effect."
HPSynC, is also a part of the Energy Frontier for Research in Extreme Environments (EFree) Center, an Energy Frontier Research Center supported at Carnegie by DOE-BES. One of the missions of this center is to harness new synchrotron radiation techniques for in situ studies of materials structure and dynamics in extreme conditions and thereby to understand and produce new energy materials.
"This study shows the promise of new techniques for probing crystal growth in real time. Our ultimate goal is to use these new methods to track chemical reactions as they occur under a variety of conditions, including variable pressures and temperatures, and to use that knowledge to design and make new materials for energy applications. This is a major thrust area of the HPSynC program that we have launched in partnership with Argonne National Laboratory," remarked Russell Hemley, the director of Geophysical Laboratory.
Image Caption: This image shows nanoparticles growing. Credit: Image courtesy Wenge Yang
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