Results 91 to 100 of about 622 (163)
Navigating Gravity: Competing Effects Result in Opposing Taxis for Different Janus Swimmers
Small, Volume 22, Issue 10, 17 February 2026.The combined effects of gravity and wall‐induced hydrodynamics on the motion of Janus colloids are investigated. Platinum‐ and copper‐coated silica microswimmers show distinct gravitactic alignment near surfaces due to different hydrodynamic couplings. This distinct gravitactic behavior enables separation of initially mixed active particles.
Amir Sheikh Shoaei +2 more
wiley +1 more source
Confined active Brownian particles: theoretical description of propulsion-induced accumulation
New Journal of Physics, 2018 The stationary-state distribution function of confined active Brownian particles (ABPs) is analyzed by computer simulations and analytical calculations. We consider a radial harmonic as well as an anharmonic confinement potential. In the simulations, the
Shibananda Das +2 more
doaj +1 more source
Microswimmers Knead Nematics into Cholesterics
Physical Review LettersThe hydrodynamic stresses created by active particles can destabilise orientational order present in the system. This is manifested, for example, by the appearance of a bend instability in active nematics or in quasi-2-dimensional living liquid crystals consisting of swimming bacteria in thin nematic films.
Bhavesh Gautam, Juho S. Lintuvuori
openaire +3 more sources
Setting the pace of microswimmers: when increasing viscosity speeds up self-propulsion
New Journal of Physics, 2017 It has long been known that some microswimmers seem to swim counter-intuitively faster when the viscosity of the surrounding fluid is increased, whereas others slow down.
Jayant Pande +4 more
doaj +1 more source
Optimal Control of Slender Microswimmers [PDF]
, 2017 We discuss a reduced model to compute the motion of slender swimmerswhich propel themselves by changing the curvature of their body. Our approach isbased on the use of Resistive Force Theory for the evaluation of the viscous forcesand torques exerted by the surrounding fluid, and on discretizing the kinematicsof the swimmer by representing its body ...
Zoppello, Marta +4 more
openaire +4 more sources
The collective motion of a binary pusher-puller mixture in viscoelastic fluids
Engineering Applications of Computational Fluid MechanicsThis study investigates the collective dynamics of the binary pusher-puller mixtures in Giesekus viscoelastic fluids using the fictitious domain method, with a focus on the synergistic effects of the mixture composition and fluid elasticity on clustering
Minkang Zhang +5 more
doaj +1 more source
Enhanced ion tolerance of electrokinetic locomotion in polyelectrolyte-coated microswimmer
Nature Communications, 2019 Electrophoretic microswimmers aren’t well suited to function in vivo because electric-field screening reduces their speed in higher ionic-strength solutions.
Xiaojun Zhan +8 more
doaj +1 more source
PROFILES OF HUMAN SPERM DENSITY IN LONG ASYMMETRIC MICROCHANNELS
Anales (Asociación Física Argentina)The development of microfluidic devices presents itself as an innovative approach to improving current assisted reproduction techniques, which are far from being highly efficient.
M. Palacio Fornero +3 more
doaj +1 more source
Stability of a Dumbbell Micro-Swimmer
Micromachines, 2019 A squirmer model achieves propulsion by generating surface squirming velocities. This model has been used to analyze the movement of micro-swimmers, such as microorganisms and Janus particles.
Takuji Ishikawa
doaj +1 more source
Advanced Intelligent SystemsMagnetic microrobots have the potential for anti‐cancer drug delivery; however, using dual‐drug to counter drug resistance, a critical issue in cancer research, has only been briefly investigated.
Yukun Zhong +5 more
doaj +1 more source