Dresden 2003 – wissenschaftliches Programm
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O: Oberflächenphysik
O 18: Rastersondentechniken II
O 18.2: Vortrag
Dienstag, 25. März 2003, 11:30–11:45, M\"UL/ELCH
Controlled motion and manipulation of nanometer-sized antimony particles using dynamic force microscopy — •Claudia Ritter1, Markus Heyde2, Udo D. Schwarz3, and Klaus Rademann1 — 1Humboldt-University Berlin, Institute of Chemistry, Brook-Taylor-Str. 2, D-12489 Berlin, Germany — 2Lawrence Berkeley National Laboratory, Material Science Division, Mailstop 66-200, Berkeley, CA 94720, USA — 3Yale University, Department of Mechanical Engineering, P.O. Box 208284, 15 Prospect Street, New Haven, CT 06520-8284, USA
The technique of controlled dynamic surface modification (DSM) by using dynamic scanning force microscopy has been utilised to perform precise nano-manipulation experiments with antimony islands, about 300 nm in diameter, on a HOPG surface. By changing the effective amplitude of the cantilever in dynamic mode AFM and hence the energy input into the sample surface, a technique is available, which allows to switch between imaging, translation or in-plane rotation and also cutting and splitting of nanoparticles. A great advantage of this experimental set-up is that both, imaging mode and DSM mode, operate with active feedback loop. Therefore, all manipulations are independent of the sample topography as well as the sample tilt. Hence the result of a manipulation experiment depends only on the effective amplitude of the manipulating cantilever and the samples adhesion and cohesion properties. A direct comparison of the corresponding threshold amplitudes, needed to translate different antimony islands and to divide a island into fragments, allows us to give evidence about motion, and tribological values like adhesion and cohesion of the adsorbate-substrate system.