Atomic Force Microcope image (false color) of polyethylene, a common plastic. • SIZE: Scale bar representes 2 µm • IMAGING TOOL: Atomic Force Microscope
Atomic Force Microcope image (black and white) of polyethylene, a common plastic. • SIZE: Scale bar representes 2 µm • IMAGING TOOL: Atomic Force Microscope
This illustration shows how an Atomic Force Microscope (AFM) is used to image a line of graphene made by a pencil. The scale spans ten orders of magnitude, from the microscope and pencil to the atoms that compose the scanning probe and pencil line. As the viewer zooms into the line, graphite flakes, and eventually a single layer of graphene, become visible. On the AFM, a silicon cantilever with a sharp atomic tip and a laser with a photodiode measure the up and down motion as the probe maps out the graphene sample.