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Trapping colloids near chemical stripes via critical Casimir forces
Matthias Tröndle, Olga Zvyagolskaya, Andrea Gambassi +4
We study theoretically and experimentally the solvent-mediated critical Casimir force acting on colloidal particles immersed in a binary liquid mixture of water and 2,6-lutidine an…
Force measurement in the presence of Brownian noise: Equilibrium distribution method vs. Drift method
Thomas Brettschneider, Giovanni Volpe, Laurent Helden +2
The study of microsystems and the development of nanotechnologies require new techniques to measure piconewton and femtonewton forces at microscopic and nanoscopic scales. Amongst…
Proliferation of anomalous symmetries in colloidal monolayers subjected to quasiperiodic light fields
J. Mikhael, M. Schmiedeberg, S. Rausch +3
Quasicrystals provide a fascinating class of materials with intriguing properties. Despite a strong potential for numerous technical applications, the conditions under which quasic…
Influence of Noise on Force Measurements
Giovanni Volpe, Laurent Helden, Thomas Brettschneider +2
We demonstrate how the ineluctable presence of thermal noise alters the measurement of forces acting on microscopic and nanoscopic objects. We quantify this effect exemplarily for…
Experimental Accessibility of Generalized Fluctuation-Dissipation Relations for Nonequilibrium Steady States
Jakob Mehl, Valentin Blickle, Udo Seifert +1
We study the fluctuation-dissipation theorem for a Brownian particle driven into a nonequilibrium steady state experimentally. We validate two different theoretical variants of a g…