Results 81 to 90 of about 4,513 (242)
Simulations of microflows induced by rotation of spirals in microchannels [PDF]
, 2008 In microflows where Reynolds number is much smaller than unity, screwing motion of spirals is an effective mechanism of actuation as proven by microorganisms which propel themselves with the rotation of their helical tails. The main focus of this study
Koz, Mustafa +2 more
core +1 more source
Flagellar swimmers oscillate between pusher- and puller-type swimming
, 2015 Self-propulsion of cellular microswimmers generates flow signatures, commonly classified as pusher- and puller-type, which characterize hydrodynamic interactions with other cells or boundaries. Using experimentally measured beat patterns, we compute that
Friedrich, Benjamin M., Klindt, Gary S.
core +1 more source
Droplet microswimmers: chemohydrodynamic and collective effects
, 2023 In this thesis, we investigate the chemohydrodynamics of droplet microswimmers from the individual to the collective scale. A popular experimental realization of a droplet micro-swimmer consists of oil-in-water (alternatively, water-in-oil) emulsions in which the outer phase is a supramicellar surfactant solution that acts as a fuel for droplet ...
openaire +1 more source
Selectively manipulable acoustic-powered microswimmers [PDF]
Scientific Reports, 2015 AbstractSelective actuation of a single microswimmer from within a diverse group would be afirst step toward collaborative guided action by a group of swimmers. Here wedescribe a new class of microswimmer that accomplishes this goal. Our swimmer designovercomes the commonly-held design paradigm that microswimmers must usenon-reciprocal motion to ...
Ahmed, Daniel +7 more
openaire +2 more sources
Fully Steerable Symmetric Thermoplasmonic Microswimmers
ACS Nano, 2021 A cornerstone of the directed motion of microscopic self-propelling particles is an asymmetric particle structure defining a polarity axis along which these tiny machines move. This structural asymmetry ties the orientational Brownian motion to the microswimmers directional motion, limiting their persistence and making the long time motion effectively ...
Martin Fränzl +3 more
openaire +3 more sources
eLife, 2017 The highly motile and versatile protozoan pathogen Trypanosoma brucei undergoes a complex life cycle in the tsetse fly. Here we introduce the host insect as an expedient model environment for microswimmer research, as it allows examination of microbial ...
Sarah Schuster +6 more
doaj +1 more source
4D Printing of Multimaterial Flexible Magneto‐Active Polymers
Advanced Materials Technologies, EarlyView.Magneto‐active polymers are 3D‐printed with tunable mechanical and magnetic properties using both superparamagnetic and hard ferromagnetic fillers. Nano‐CT imaging reveals the spatial distribution of particles within the matrix. Programmable magnetization patterns and soft, flexible architectures enable responsive actuation, offering exciting ...
Naji Tarabay +6 more
wiley +1 more source
Thrust and Hydrodynamic Efficiency of the Bundled Flagella
Micromachines, 2019 The motility mechanism of prokaryotic organisms has inspired many untethered microswimmers that could potentially perform minimally invasive medical procedures in stagnant fluid regions inside the human body.
Umit Danis +5 more
doaj +1 more source
Tank-treading as a means of propulsion in viscous shear flows
, 2011 The use of tank-treading as a means of propulsion for microswimmers in viscous shear flows is taken into exam. We discuss the possibility that a vesicle be able to control the drift in an external shear flow, by varying locally the bending rigidity of ...
Farutin +5 more
core +1 more source
Stirring by Periodic Arrays of Microswimmers [PDF]
, 2016 The interaction between swimming microorganisms or artificial self-propelled colloids and passive (tracer) particles in a fluid leads to enhanced diffusion of the tracers. This enhancement has attracted strong interest, as it could lead to new strategies
de Graaf, Joost, Stenhammar, Joakim
core +2 more sources