Veeco Dimension 3100, Руководство пользователя

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Lateral Force Mode
Advanced LFM Operation
Rev. D Dimension 3100 Manual 197
12.3 Advanced LFM Operation
12.3.1 Scan Direction
The cantilever is most susceptible to frictional effects when the scan direction runs perpendicular to
the major axis of the cantilever as shown in
Figure 12.3a . The Scan angle parameter in the Scan
Controls panel must be set to 90° or 270° to produce this scan direction.
Figure 12.3a Scan Angle Selection
The contact mode setpoint voltage will slightly adjust the “gain” of the lateral force signal. By
increasing the setpoint, the contact force applied will increase, and so will the frictional or torsional
forces in an approximately linear fashion. If the frictional effects are far too large or too small, it
will be necessary to resort to changing the cantilever probe used, but if the value is near the
dynamic range desired, adjustment of the contact force will produce modest changes in the lateral
force or frictional signal.
Scan Direction
for Friction
Measurements
scan angle
90° or 270°
Scan Direction
without Scan
Rotation
scan angle 0°
Cantilever
(Top View)