Sorting of chiral microswmmers

dc.contributor.advisorVolpe, Giovanni
dc.contributor.authorMijalkov, Mite
dc.departmentDepartment of Physicsen_US
dc.descriptionAnkara : The Department of Physics and the Graduate School of Engineering and Science of Bilkent University, 2014.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2014.en_US
dc.descriptionIncludes bibliographical references leaves 40-42.en_US
dc.description.abstractMicroscopic swimmers, for example chemotactic bacteria and cells, are capable of directed motion by exerting a force on their environment. In some cases, including bacteria and spermatozoa swimming near boundaries, or many asymmetrical artificial microswimmers, the driving force and propulsion direction are misaligned. In those situations a torque acting on the microswimmers arises, resulting in motion with a well-defined chirality which is circular in two dimensions and helicoidal in three dimensions. In this thesis, I demonstrate with numerical simulations in two dimensions, how the chirality of the circular motion can couple to chiral features present in the microswimmer environment. I show that by employing static chiral pattern of elliptical obstacles in their environment, microswimmers can be separated on the basis of their motion parameters. In particular, levogyre and dextrogyre microswimmers as small as 50nm can be separated and selectively trapped in chiral flowers of ellipses. Patterned microchannels can be used as funnels to rectify the microswimmer motion, as sorters to separate microswimmers based on their linear and angular velocities, and as sieves to trap microswimmers with specific parameters. I also demonstrate that these results can be extended to helicoidal motion in three dimensions.en_US
dc.description.statementofresponsibilityMijalkov, Miteen_US
dc.format.extentxii, 84 leaves, graphicsen_US
dc.publisherBilkent Universityen_US
dc.subjectActive chiral microswimmersen_US
dc.subjectsorting of microswimmersen_US
dc.subject.lccQP517.65.M65 M55 2014en_US
dc.subject.lcshMolecular dynamics--Computer simulation.en_US
dc.titleSorting of chiral microswmmersen_US
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
5.19 MB
Adobe Portable Document Format