Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 60: Poster Session III (Methods: Atomic and electronic structure; Methods: electronic structure theory; Methods: Molecular simulations and statistical mechanics; Methods: Sanning probe techniques; Methods: other (experimental); Methods: other (theory) )
O 60.15: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B2
Study on automated atom manipulation — •Boris Wolter1, André Kubetzka1, Roland Wiesendanger1, Bernd Schütz2, and Jianwei Zhang2 — 1Institut für Angewandte Physik, Universität Hamburg, Jungiusstr. 11, 20355 Hamburg — 2Technical Aspects of Multimodal Systems (TAMS), Universität Hamburg, Vogt-Kölln-Str. 30, 22527 Hamburg
Recent years have shown an increasing number of investigations concerning automation of atom manipulation via STM [1,2]. In our study, we employed a Monte-Carlo simulation to model the interactions between tip, sample and adsorbates [3]. Based on this simulation, we explored the prospects of automated lateral manipulation of single atoms. Required techniques like adsorbate detection, learning of manipulation parameters, path planning with uncertainty [4] and manipulation tracing were developed and tested within the simulated STM environment.
In more recent work, we focus on a local scan method for exact positioning of the tip above specified adsorbates [1]. The primary goals of this method are to prevent time consuming scans of large areas, to counter drift in long-term experiments and to increase experimental accuracy. Once finished, it will be combined with automation techniques for tunneling spectroscopy and atom manipulation.
[1] H. Chen et al., Proc. of ICRA, 169-174 (2005)
[2] T. Knepper et al., Proc. of ROBIO, 95 (2005)
[3] A. Kühnle et al., Surf. Sci. 449, 15 (2001)
[4] J.P. Gonzalez et al., Proc. of IROS, 2435-2442 (2005)