Regensburg 2004 – wissenschaftliches Programm

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O: Oberflächenphysik

O 23: Rastersondentechniken II

O 23.7: Vortrag

Dienstag, 9. März 2004, 17:15–17:30, H36

SPM goes video rate and beyond — •M.J. Rost, T.H. Oosterkamp, J.W.M. Frenken, and et al. — Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden

The low imaging rates of conventional scanning probe microscopes (SPMs) makes these instruments impractical for many applications. We have developed a novel, flexible SPM control system that can be easily connected to any SPM, which allows up to 50 Hz imaging rates with 256 x 256 pixels per image. Since fast scanning is impossible without fast feedback electronics, we have also developed a low-noise STM-feedback system with a total bandwidth of 600 kHz (including the preamp). We present high-speed STM movies (images) with 25 Hz frame rate and tip speeds up to 0.3 mm/s while keeping atomic step resolution on Cu(001), obtained with a conventional STM. With a new, compact scanner we have even reached 200 Hz frame rate on graphite while still obtaining atomic resolution.

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