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I have been getting an imaging artefact recently using the Multimode 8, ScanAsyst in Fluid where 1-3 microns at one edge of my image are blurred. This happens on all scan sizes and scan rates and at all scan angles. I have tried replacing the tip (DNP-10D) multiple times, have tried changing the peak force setpoint. Changing the direction from trace to retrace makes the artefact appear on the other side of the image. The artefact does not occur when imaging in air (Using ScanAsyst in Air).
The problem might be related to my horizontal deflection which slowly creeps to high values (from 0 to values >+3), but my vertical deflection remains fairly constant and the blurring only occurs at the edge of the image.
So my question here is if anyone has experienced the same artefact and knows that is the cause?
Thanks!
An image artefact at one edge of the image frame sounds like a rounding error. Check that the rounding parameter is not 0. If it is, give it a value such as 0.1 or 0.15. This may make the artefact disappear. Rounding simply allows the scanner to overshoot the recorded image frame (i.e. by nominally 10% 15%) such that the data you capture is at a linear scanner velocity rather than inclusive of the turnaround point. The rounding parameter can be set by showing all the parameters in the scan parameter area or from one of the top menus in the software - scanner XY settings or something similar. If the problem is not rounding and it persists please contact service and we can troubleshoot it more:
Normal 0 false false false EN-US X-NONE X-NONE AFMSupport@Bruker-Nano.com
Thank you very much Ian, this actually solved the problem for me!