Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 22: Methods: Scanning probe techniques III
O 22.2: Vortrag
Dienstag, 23. März 2010, 10:45–11:00, H32
Imaging surfaces with scanning tunneling hydrogen microscopy — •Christian Weiss1,2, Stefan Tautz1,2, and Ruslan Temirov1,2 — 1Institut für Bio- und Nanosysteme (IBN-3) and — 2JARA Fundamentals of Future Information Technology
Recently it has been demonstrated that a single hydrogen molecule confined in the junction of a scanning tunneling microscope (STM) acts as a combined force-sensor/signal transducer that probes the local surface adsorption potential and converts the force signal into variations of the junction conductance [1]. Images taken with the new method, called scanning tunnelling hydrogen microscopy (STHM), show an ultra-high geometric resolution, which resembles chemical structure formulae of the imaged compounds [2]. In our contribution we discuss applications of the STHM to imaging of various surfaces and show the operation in two different regimes. In one regime the hydrogen sensor maps the repulsive short-range interactions [1], while in the other possibly the attractive ones.
References:
C. Weiss et al. arXiv:condmat/0910.5825
R. Temirov et al. 2008 New. J. Phys 10 053012