5-52
TMPM5200-2
left side of the screen, and the surface
■
Observation
Click on the Scan button in the SKPM tab window.
The topographical image is displayed on the
potential image is displayed on the right side.
Topography
image
image
Sur face
potential
Set Clock/ms to 3.3333 ms or more and set Filter/Hz to 0.1 Hz. If the sample is
p
oop Gain.
tract the
the bias voltage applied across the
specimen and the cantilever, the higher the resolving power. So you must keep in
mind the fact that the excitation frequency is set so as not to exceed the
The
urface potential of the
comparatively flat, set its Loop Gain to 2. If the sample is uneven, set its Loop Gain
to 8. If the to ographical image does not become stable (the tip catches), increase
the Clock setting. If that does not help improve the situation, increase the L
To increase the Loop Gain, first click on the Retract On button to re
cantilever from the sample, then change the Gain. After changing Reference in the
SKPM tab window to minus, click on Retract Off and change Reference to plus.
Then perform the approach slowly.
The higher the modulation frequency of
characteristic frequency of the cantilever.
captured surface potential image directly shows the s
sample (the vertical axis value relating to the surface potential image profile).
