Nanowires That Know Their Boundaries (3 of 4) (VIDEO)
Caption
This movie shows the same wire but now we are cooling it down from 570°C to 500°C. The liquid droplet suddenly solidifies, changing from a hemispherical shape to a shape with flat surfaces. The wire still continues to grow during cooling. At the end of the movie, the solid particle shifts over and the wire starts growing in a different direction. This video relates to an article that appeared in the Nov. 27 issue of Science, published by AAAS. The study, by Dr. C.-Y. Wen at Purdue University in West Lafayette, Ind., and colleagues, was titled, "Formation of Compositionally Abrupt Axial Heterojunctions in Silicon-Germanium Nanowires."
Credit
Videos courtesy of IBM
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