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Honolulu, HI, United States, 2006/09/07 - While growth processes of nanostructures are well understood, the stability of artificial nanostructures has not been thoroughly investigated..
Fully understanding the fluctuations of nanostructures and their interactions with their surroundings is essential in order to achieve complete shape control of nanostructures. In recent work, French scientists address the morphogenesis, instability and catastrophic collapse of nanostructures.
The French researchers work on shape generation in islands grown from the deposition of preformed clusters opens new routes for investigating instabilities in nanostructures. These instabilities are induced by inner constraints within the grown nano-objects and not by those applied externally by the substrate.
A paper about their findings, titled "Dynamics of Polymorphic Nanostructures: From Growth to Collapse" was published in the July 19, 2006 online edition of Nano Letters.
Dr. Catherine Bréchignac, a physicist at the Clusters and Nanophysics Group at the Laboratoire Aimé Cotton at the Université Paris Sud, who earlier this year was named chairwoman of CNRS, the French National Center for Scientific Research, explained her group's recent work to Nanowerk: "By depositing preformed antinomy clusters on a cleaved graphite surface we generated unusual polymorphic nano-islands. We used these islands as test platforms for monitoring instabilities as a function of shape, size, mass and strain."
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By Michael Berger, Copyright 2006 Nanowerk LLC