Microscopes use light to magnify items too small for the naked eye and generally expand them about 1,000 times. Now imagine a much fancier microscope, one that uses electrons instead of light and enlarges images as many as 300,000 times. Sounds great, huh? They are called electron microscopes, and while thousands are in existence, among them is a special group of electron microscopes called electron microprobes. The electron microprobe uses a field emission gun of which there is only a handful worldwide. In a joint project with the University of North Carolina at Pembroke, Fayetteville State University has become home to one of those few microprobes.
Link: http://www.uncfsu.edu/events/microprobe.htm