Self excitation, frequency detection, Q-Control The
frequency
modulation/demodulation
(FM) mode applied toSPM is used in the non-contact operation mode. It
allows to directly measure the oscillation frequency of the
cantilever. In this mode the cantilever is excitated in its own
resonant frequency. This not only allows to work faster and much more
sensitive, but also to completely control the so-called Q-factor of the
cantilever. The advantage is to make an optimum adjustment of your SPM
depending on the sample/environment requirements.
The new S.I.S. FMControl®
extends
the universal
AFM-Controller SCANControl®
C
by the following functions: Self excitation, frequency detection,
Q-Control
<<<
Enhancing
the contrast
Minimizing
vibration disturbances
Self
excitation
enables high resolution,
disturbance
free frequency
images. The direct comparison
of topography and frequency
data reveals:
Frequency
images show detailed material contrast even on a poorly
structured topography (Fig. 1st row).
Even if the topography is obscured by external vibrations (Fig. 2nd
row) the frequency channel does not show any of those
disturbances.
The FMControl®
is available as an upgrade for all SURFACE IMAGING SYSTEMS' instruments
including the SCANControl®
C (i.e. ULTRAObjective®,
NANOStation®
II,
PICOStation).
