F
Felix Kümmel
Researcher at University of Stuttgart
Publications - 10
Citations - 2206
Felix Kümmel is an academic researcher from University of Stuttgart. The author has contributed to research in topics: Particle & Brownian motion. The author has an hindex of 8, co-authored 10 publications receiving 1823 citations. Previous affiliations of Felix Kümmel include Max Planck Society.
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Journal ArticleDOI
Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles.
Ivo Buttinoni,Ivo Buttinoni,Julian Bialké,Felix Kümmel,Felix Kümmel,Hartmut Löwen,Clemens Bechinger,Clemens Bechinger,Thomas Speck +8 more
TL;DR: A (quasi-)two-dimensional colloidal suspension of self-propelled spherical particles propelled due to diffusiophoresis in a near-critical water-lutidine mixture finds that the driving stabilizes small clusters and undergoes a phase separation into large clusters and a dilute gas phase.
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Active Brownian motion tunable by light
TL;DR: It is shown that the illumination-borne heating induces a local asymmetric demixing of the binary mixture, generating a spatial chemical concentration gradient which is responsible for the particle's self-diffusiophoretic motion.
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Circular motion of asymmetric self-propelling particles.
Felix Kümmel,Borge ten Hagen,Raphael Wittkowski,Ivo Buttinoni,Ralf Eichhorn,Giovanni Volpe,Hartmut Löwen,Clemens Bechinger +7 more
TL;DR: This work produces asymmetric microswimmers by soft lithography and studies their circular motion on a substrate and near channel boundaries in full agreement with a theory of Brownian dynamics for asymmetric self-propelled particles.
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Gravitaxis of asymmetric self-propelled colloidal particles
Borge ten Hagen,Felix Kümmel,Raphael Wittkowski,Daisuke Takagi,Hartmut Löwen,Clemens Bechinger,Clemens Bechinger +6 more
TL;DR: It is demonstrated that a shape anisotropy alone is sufficient to induce gravitactic motion with either preferential upward or downward swimming, and trochoid-like trajectories transversal to the direction of gravity are observed.
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Formation, compression and surface melting of colloidal clusters by active particles
TL;DR: It is demonstrated with experiments and numerical simulations that the structure and dynamics of a suspension of passive particles is strongly altered by adding a very small (<1%) number of active particles.