Hi,
I am a graduate student at University of Minnesota. I like making scientific animations in my free time. Recently I finished an animation about Si(111) 7x7 reconstruction. The name is weird, but when you watch the animation, you might know what is 7x7 reconstruction. You can access the video from my web site:
http://www.tc.umn.edu/~liang050
There are other animations and illustrations on the web site.