A simple catch: thermal fluctuations enable hydrodynamic trapping of microrollers by obstacles

Ernest B. van der Wee, 5, ∗ Brendan C. Blackwell, Florencio Balboa Usabiaga, Andrey Sokolov, Isaiah T. Katz, Blaise Delmotte, † and Michelle M. Driscoll ‡ Department of Physics & Astronomy, Northwestern University, Evanston, IL 60208, USA LadHyX, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, 91120, France BCAM Basque Center for Applied Mathematics, Mazarredo 14, E48009 Bilbao, Basque Country Spain Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA Current address: Department of Imaging Physics, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, the Netherlands (Dated: May 19, 2022)