Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 20: Tribology: Surfaces and Nanostructures
O 20.3: Poster
Montag, 7. März 2016, 17:00–19:30, Poster A
Study of Nano Particle Interaction Force of Various Material Systems Using Atomic Force Microscopy — •Irina Schrezenmeier1, Daniel Geiger1, Clara Wanjura1, Matthias Roos2, Eugen Foca2, and Othmar Marti1 — 1Institute of Experimental Physics, Ulm University — 2Cleaning Technology Analytics, Carl Zeiss SMT GmbH
The use of nano particles in todays applications and the understanding of their characteristics is of utmost scientific and technological interest. One of these characteristics that needs further attention is the interaction force of nano particles with different substrates. We found that the interaction force of silica particles on silicon substrate shows aging phenomena. The force increases with time and parameters like humidity and temperature influence it as well. The aim of this work is to extend the measurements to the interaction force of various material combinations, such as aluminium particles on aluminium substrates, as well as combinations of aluminium with silica particles and silicon substrates. Further it is investigated if the roughness of the substrate's surface has an influence on the interaction force of the particle to this surface. Measuring this force is done by lateral atomic force microscopy (AFM). Thereby the particle is moved in contact mode AFM, where the torsion of the cantilever gives the force excerted on the particle. The trajectory of the particle is then recorded by imaging the sample in tapping mode AFM before and after the displacement.