Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Crystallization and Self Assembly II
CPP 9.10: Vortrag
Montag, 22. März 2010, 16:15–16:30, H48
Robobeads: towards remote friction measurements at small scales — •Stephan Herminghaus1, Zeina Khan1, Audrey Steinberger1, and Ralf Seemann2 — 1MPI für Dynamik und Selbstorganisation, Göttingen — 2Universität des Saarlandes, Fakultät für Physik
We have recently discovered that small adhesive spheres may assemble to form aggregates which perform rapid locomotion on a substrate if an external oscillatory drive field is applied. The concept is demonstrated with sub-millimetric wet spheres on a horizontally vibrated flat plate. Quite strikingly, the aggregates tend to align by themselves such as to extract the maximum energy from the drive field. A theoretical treatment shows that this concept is quite robust and under certain circumstances may be scalable down to the sub-micron range