Atomic force microscopy: loading position dependence of cantilever spring constants and detector sensitivity.
A simple and accurate experimental method is described for determining the effective cantilever spring constant and the detector sensitivity of atomic force microscopy cantilevers on which a colloidal particle is attached. By attaching large (approximately 85 microm diameter) latex particles at various positions along the V-shaped cantilevers, we demonstrate how the normal and lateral spring constants as well as the sensitivity vary with loading position. Comparison with an explicit point-load theoretical model has also been used to verify the accuracy of the method.
Vakarelski
Ivan U
IU
Particulate Fluids Processing Center, School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia.
Edwards
Scott A
SA
Dagastine
Raymond R
RR
Chan
Derek Y C
DY
Stevens
Geoffrey W
GW
Grieser
Franz
F