video: 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." view more
Credit: Videos courtesy of IBM