Gallium Ions

What you see on the pictures is human hair magnified many, many times. Carved on the hair is the logo of McMaster University in Ontario Canada. How is that possible? Dr. Ray LaPierre, a professor at the Department of Engineering at that institution, came up with a way to tattoo hair using something called gallium ions.

"Dr. LaPierre's group used a focus ion beam microscope (FIB) to shoot a beam of gallium ions at the surface of a human hair, carving atoms off the of the surface of the hair to etch these McMaster University logos," Boing Boing explains. "When not tattooing hair, they'll use the FIB microscope to fabricate nanoscale devices."

Eyes, teeth and now hair. I can't wait to be able to get a tat on my liver!