Diffusion of Lead Atoms on a Lead-on-Silicon Island (VIDEO)
Caption
This video shows the remarkable diffusion of lead atoms on a lead-on-silicon island. Here, the black region is an area empty of lead, and the region outside is a moving lead layer. (The grey area is because the new lead atoms that enter the empty area are not yet in their perfect sites.) Real-time for the video is 50 seconds and the temperature is negative 163 degrees Fahrenheit. The video was created at Hong Kong University of Science and Technology using low-energy electron microscopy in collaboration with Ames Laboratory scientists.
Credit
US Department of Energy's Ames Laboratory
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