Feedback controller in probe microscope utilizing a switch and a inverter
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United States of America Patent
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Sep 22, 2015
Grant Date -
Nov 7, 2013
app pub date -
Jul 5, 2013
filing date -
Apr 9, 2010
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Abstract
A method of measuring properties of a sample, the method comprising: measuring a deflection of a cantilever of a COIFM; measuring a voltage at an actuator contacting the cantilever and configured to counteract the deflection of the cantilever; measuring a voltage at a scan signal source, wherein the scan signal source is communicably coupled to the piezotube and configured to move the piezotube along an X- and a Y-axis; measuring a voltage at a feedback controller, wherein the feedback controller is communicably coupled to the piezotube and configured to move the piezotube along a Z-axis; switching a switch from a first position to a second position; switching the switch to a third position; correlating at least one of the measurements to (i) a repulsive force, and (ii) an attractive force.
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