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Nothing like a quality sample preparation (thanks Natalia!) and an awesome AFM to get great soft-sample high-speed images (thanks Shuiqing & Adam!). This new video shows height and phase of freshly prepared Celgard; the images are at ~20um/s (or 10Hz scan rate for 1um images):
Scanning >10x the typical could be the benchmark for claiming a high speed AFM.I believe all vendors also have access to Celgard, but if anyone out there thinks they can go faster, but does not have it, let me know and I will send it you.Best,SteveBruker AFMPS: We lose of bit of fidelity in the conversion to wmv and again to youtube. The entire wmv is available for download from the link above, but seeing live is the ultimate. . .
PS: A good test of the robustness of a system is to scan Celgard® in different orientations; here is an even faster video (23Hz) where the mesh is perpendicular to the scan.Enjoy,Steve
It’s good to see some community attempts at replicating the performance of the Dimension FastScan. The screen shot below is of a 1um, 512x512, 22Hz, Video of Celgard® taken with the Dimension FastScan (Video link at end). This demonstration is over twice as fast as the 10Hz video we show above. As you start to see different images and movies, there are a couple key things to look for: In the FastScan phase images you can see a couple important things. Each of the domains on the top surface is well defined. If a system is not tracking, or scanning beyond its limits, those features will look washed out as in the example on the right. Another good indication of tracking is if the phase signal “tops-out”. In the FastScan image at 22Hz, this is not a problem. In the image on the right the system is not fully tracking as indicated by the white vertical streaks in the image, or alternatively, the significant dips in the line traces.It’s also good to look at the topography line traces. Sometimes, trace/retrace will not match. Often this can be corrected by simple optimization, and this in turn can lead to significantly faster imaging speeds. However, if it coupled with the phase problems, like on the left images, it more likely this indicates a system is trying to imaging beyond its capability.Also, in your evaluations be sure to include all of the criteria to be considered fast. The previous robust community discussion also recommended TipCheck and a Grating videos. Best,Steve
Celgard® is a registered trademark of Celgard, LLC , and is not associated with Bruker Nano
this is very impressive!
Thanks for the comment and I can send you one.
Send me your information at steve.minne (at) bruker-nano (dot) com