Researchers have captured the layer-by-layer growth of a GaAs nanocrystal on video using an electron microscope. The nanocrystal grows under a droplet of liquid gold. A summary of the research and video are reported at Focus: Video—Growing a Crystal One Atomic Layer at a Time, and the paper Atomic Step Flow on a Nanofacet can be found at the APS website.
![Image](https://physics.aps.org/assets/63fc40b7-7e15-4aa9-80ca-6e4533dfb7c6/e106_1.png)