Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 26: Oxides and insulators: Clean surfaces
O 26.4: Vortrag
Dienstag, 23. März 2010, 11:15–11:30, H40
3D force spectroscopy on KBr(001) by tuning fork based nc-AFM at low temperatures — Bartosz Such1, •Sweetlana Fremy2, Shigeki Kawai2, Sascha Koch2, Thilo Glatzel2, and Ernst Meyer2 — 1Research Center for Nanometer-Scale Science and Advanced Materials (NANOSAM), Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, Reymonta 4, 30-059 Krakow, Poland — 2University of Basel, Klingelbergstrasse 82, 4056 Basel
We will present 3D dynamic force spectroscopy measurements on KBr(001) by tuning fork based nc-AFM [1] at low temperatures. The high stiffness of a tuning fork enables high-sensitive measurements of the short-range interaction with small oscillation amplitudes [2]. We performed the topographic method to collect 3D frequency shift and energy dissipation maps while keeping an amplitude of 200 pm [3]. The results suggest that significant tip relaxation is present at the smallest tip-sample separations. Analyzing the shape of force vs. distance curves and the cross sections of the 3D frequency shift dataset allows the identification of chemical identity of the tip apex as K+ ion.
[1] F.J. Giessibl, Appl. Phys. Lett. 76, 1470 (2000). [2] S. Hembacher and F. J. Giessibl and J. Mannhart, Science 305, 380 (2004). [3] B. J. Albers, T. C. Schwendemann, M. Z. Baykara, N. Pilet, M. Liebmann, E. I. Altman, U. D. Schwarz, Nature Nano. 4, 307 (2009).