We Can Figure This Out.org
Virtual Lab: SPM Piezoelectric Crystals
University of Virginia
             
 
© 2003-Present, John C. Bean
 
There is a final length of piezoelectric tube at the bottom of the assembly. On this segment, a single metal electrode runs around the outside of the entire tube.

If a positive voltage is applied to this electrode, the tube thickens and shortens. This motion is used to raise and lower the SPM cantilever.

 
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