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February 1st, 2008

A Biased View of the Nanoworld: Electromechanical Imaging By Scanning Probe Microscopy

Abstract:
Electromechanical coupling is ubiquitous in all polar inorganic materials (e.g. 20 out of 32 crystallographic point groups are piezoelectric). Furthermore, virtually all biopolymers combining polar (e.g. -CO-NH-) groups and optical activity are piezoelectric, resulting in piezoelectric activity in calcified and connective tissues, including bone, dentin, enamel, and cartilage. The very basis of functional biological systems is electromechanics—from nerve-controlled muscle contraction on the macroscale, to cardiac activity and hearing on the micron scale, to energy storage in mitochondria, voltage-controlled ion channels, and electromotor proteins on the nanoscale.

Source:
rdmag.com

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