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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The effect of topography changes on ImAFM force measurement. (a) histogram of ImAFM stiffness and (b) work of attractive force Wattr versus the histogram first derivative of height obtained from tapping mode.