Nanosurf easyScan 2 AFM, Руководство по эксплуатации

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A F
IRST
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EASUREMENT
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Approaching the sample
To start measuring, the tip must come within a fraction of a nanometer of
the sample without touching it with too much force. To achieve this, a very
careful and sensitive approach of the cantilever is required. This delicate
operation is carried out in three steps: Manual coarse approach, manual
approach using the approach stage, and the automatic final approach. The
colour of the probe status light on the controller shows the status of the
approach:
orange Normal state during approach, the Z-scanner is fully
extended toward the sample.
red The approach has gone too far, the tip was driven into
the sample, and the Z-scanner is fully retracted from
the sample. In this case, the tip is probably damaged,
so you will have to start over again with installing a
new tip.
green The approach is finished, the Z-scanner is within the
measuring range.
The approach is operated using the Positioning window. To open this win-
dow:
- Click the Positioning icon in the Navigator.
Use the side view of the cantilever to judge the distance between tip and the
sample surface. To use the side view:
- If the AFM Video Module is installed, click in the
Video panel of the Positioning window.
- If you do not have the Video Module, use the side view lens to observe
the sample instead.
Even if you do not have the Video Module, you can use the Top and Side
view switches to quickly change the illumination to a predetermined level.