Results 111 to 120 of about 1,413 (213)
Activatable smart contrast agents for photoacoustic imaging
Smart Molecules, Volume 4, Issue 2, June 2026.This review highlights recent advances in smart activatable photoacoustic imaging (PAI) contrast agents, which dynamically modulate their optical properties in response to external stimuli or microenvironmental cues. It discusses their molecular design, activation mechanisms, biomedical applications, and future prospects for clinically tailored use ...
Donghyeon Oh +5 more
wiley +1 more source
Hydrodynamic length-scale selection in microswimmer suspensions [PDF]
, 2016 A universal characteristic of mesoscale turbulence in active suspensions is the emergence of a typical vortex length scale, distinctly different from the scale invariance of turbulent high-Reynolds number flows. Collective length-scale selection has been
Klapp, Sabine H. L. +3 more
core +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
Random self-propulsion to rotational motion of a microswimmer with inertial memory [PDF]
, 2023 We study the motion of an inertial microswimmer in a non-Newtonian environment with a finite memory and present the theoretical realization of an unexpected transition from its random self-propulsion to rotational (circular or elliptical) motion. Further,
Adersh, F, Sahoo, M, Muhsin, M
core +1 more source
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
Realization of the Najafi-Golestanian microswimmer
, 2017 The development of artificial microswimmers, microscopic robots that swim in a fluid like sperm cells and motile bacteria, could cause a leap forward in various fields such as microfluidics, microsystems, or minimally invasive medicine. Nature provides
Hubert, Maxime +3 more
core
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
Simulation of collective phenomena in microswimmer suspensions [PDF]
, 2020 Collective motion is ubiquitous in biological and synthetic systems across manylength- and timescales. On the macroscopic scale, examples include schools of fish, herds of sheep and flocks of birds. On the microscopic scale, bacteria, algae and synthetic
Bardfalvy, Dora
core
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
Enhanced motility of a microswimmer in rigid and elastic confinement
, 2013 We analyze the effect of confining rigid and elastic boundaries on the motility of a model dipolar microswimmer. Flexible boundaries are deformed by the velocity field of the swimmer in such a way that the motility of both extensile and contractile ...
Ledesma-Aguilar, R +3 more
core +1 more source