The capability of misfit dislocations to generate nanostructures in the bulk of heteroepitaxial systems is demonstrated. It is shown that dislocation slip originating from compositionally graded layers can produce a range of low-dimensional structures including nanowires, nanodots, and mosaic superlattices. Formation of the nanostructures is achieved in parallel processing, through a simple two-step cycle which includes growth of layered planar structures and postgrowth annealing.
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A dictionary definition of a machine is “any system, usually of rigid bodies, formed and connected to alter, transmit, and direct applied forces in a predetermined manner to accomplish a specific objective, such as the performance of useful work” [K. E. Drexler, Engines of Creation (Anchor, New York, 1986)].
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© 1997 American Institute of Physics.
1997
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