TITLE

Phase imaging and the lever-sample tilt angle in dynamic atomic force microscopy

AUTHOR(S)
D'Amato, Matthew J.; Marcus, Matthew S.; Eriksson, Mark A.; Carpick, Robert W.
PUB. DATE
November 2004
SOURCE
Applied Physics Letters;11/15/2004, Vol. 85 Issue 20, p4738
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The phase shill in amplitude-controlled dynamic atomic force microscopy (AFM) is shown to depend on the cantilever-sample tilt angle. For a silicon sample and tip the phase shill changes by nearly 15° for a change in tilt angle of 15°. This contribution to the phase results from the oscillating tip's motion parallel to the surface, which contributes to the overall energy dissipation. It occurs even when the measurements are carried out in the attractive regime. An oil-axis dynamic AFM model incorporating van der Waals attraction and a thin viscous damping layer near the surface successfully describes the observed phase shifts. This effect must he considered to interpret phase images quantitatively.
ACCESSION #
15075040

 

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