We Can Figure This Out.org
Virtual Lab: Scanning Tunneling Microscope (STM)
University of Virginia
© 2003-Present, John C. Bean
The tip holder is attached to a "piezoelectric crystal" which is, in turn, attached to the easyScan's main circuit board by a flexible arm.

Piezoelectric crystals slightly change their size and shape when voltages are applied across them.

(To view a presentation about the inner workings of piezoelectric crystals CLICK HERE).

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