Colloids in two-dimensional active nematics: conformal cogs and controllable spontaneous rotation [PDF]
New Journal of Physics, 2023 A major challenge in the study of active systems is to harness their non-equilibrium dynamics into useful work. We address this by showing how to design colloids with controllable spontaneous propulsion or rotation when immersed in active nematics.
Alexander J H Houston +1 more
doaj +4 more sources
Formation of stable and responsive collective states in suspensions of active colloids. [PDF]
Nat Commun, 2020 Many animal species organise into disordered swarms, polarised flocks or swirls to protect from predators or optimise foraging. Previous studies suggest that such collective states are related to a critical point, which could explain their balance ...
Bäuerle T, Löffler RC, Bechinger C.
europepmc +2 more sources
Emergent dynamics of light-induced active colloids probed by XPCS [PDF]
New Journal of Physics, 2022 Self-propelled particulate systems manifest certain collective behavior of living matter, which have been the subject of intense research over the past decades.
Thomas Zinn +5 more
doaj +2 more sources
Anomalous fluctuations in a droplet of chemically active colloids or enzymes [PDF]
Physical Review LettersChemically active colloids or enzymes cluster into dense droplets driven by their phoretic response to collectively generated chemical gradients. Employing Brownian dynamics simulation techniques, our study of the dynamics of such a chemically active ...
K. R. Prathyusha +2 more
semanticscholar +5 more sources
Chemokinesis-driven accumulation of active colloids in low-mobility regions of fuel gradients. [PDF]
Sci Rep, 2021 Many motile cells exhibit migratory behaviors, such as chemotaxis (motion up or down a chemical gradient) or chemokinesis (dependence of speed on chemical concentration), which enable them to carry out vital functions including immune response, egg ...
Moran JL +3 more
europepmc +3 more sources
Driven and active colloids at fluid interfaces [PDF]
Journal of Fluid Mechanics, 2021 We derive expressions for the leading-order far-field flows generated by externally driven and active (swimming) colloids at planar fluid–fluid interfaces.
Nicholas G. Chisholm, Kathleen J. Stebe
openalex +3 more sources
Pairing, waltzing and scattering of chemotactic active colloids [PDF]
New Journal of Physics, 2019 We study theoretically an active colloid whose polar axis of self-propulsion rotates to point parallel (antiparallel) to an imposed chemical gradient. We show that the coupling of this ‘chemotactic’ (‘antichemotactic’) response to phoretic translational ...
Suropriya Saha +2 more
doaj +2 more sources
Active colloids as mobile microelectrodes for unified label-free selective cargo transport. [PDF]
Nat Commun, 2018 Utilization of active colloids to transport both biological and inorganic cargo has been widely examined in the context of applications ranging from targeted drug delivery to sample analysis.
Boymelgreen AM +3 more
europepmc +2 more sources
‘Fuelled’ motion: phoretic motility and collective behaviour of active colloids [PDF]
Chemical Society Reviews, 2017 Designing microscopic and nanoscopic self-propelled particles and characterising their motion have become a major scientific challenge over the past few decades.
Pierre Illien +2 more
exaly +2 more sources
Active colloids at fluid interfaces [PDF]
Soft Matter, 2016 If an active Janus particle is trapped at the interface between a liquid and a fluid, its self-propelled motion along the interface is affected by a net torque on the particle due to the viscosity contrast between the two adjacent fluid phases. For a simple model of an active, spherical Janus colloid we analyze the conditions under which translation ...
Paolo Malgaretti +2 more
openalex +6 more sources