116 citations · 392 across the 12 of their papers we have counts for
12 papers
Spontaneous currents determine capillary rise in active matter
Xinyi Dong, Yongfeng Zhao
The capillary rise of simple passive fluids in a tube is given by Jurin's law of capillary action, which balances surface tension and gravity. For fluids composed of active particl…
Integer Topological Defects Reveal Anti-Symmetric Forces in Active Nematics
Zihui Zhao, Yisong Yao, He Li +5
Cell layers are often categorized as contractile or extensile active nematics but recent experiments on neural progenitor cells with induced topological defects challenge this…
Wetting by active fluids
Yongfeng Zhao, Ruben Zakine, Adrian Daerr +3
The Young-Dupré equation is a cornerstone of the theory of capillary and wetting phenomena that governs the shape of droplets adsorbed on surfaces in equilibrium. But many living a…
Rheology of active fluids
Alfredo Lanzaro, Luigi Gentile
This chapter on the rheology of active fluids is an attempt to correlate theoretical and experimental work. A considerable amount of theoretical work and most of the experimental d…
Characterization and Control of the Run-and-Tumble Dynamics of {\it Escherichia Coli}
Christina Kurzthaler, Yongfeng Zhao, Nan Zhou +8
We characterize the full spatiotemporal gait of populations of swimming {\it Escherichia coli} using renewal processes to analyze the measurements of intermediate scattering functi…
Quantitative characterization of run-and-tumble statistics in bulk bacterial suspensions
Yongfeng Zhao, Christina Kurzthaler, Nan Zhou +8
We introduce a numerical method to extract the parameters of run-and-tumble dynamics from experimental measurements of the intermediate scattering function. We show that proceeding…
An Introduction to Motility-Induced Phase Separation
Jérémy O'Byrne, Alexandre Solon, Julien Tailleur +1
Active particles may undergo phase separation when interactions oppose self-propulsion, in the absence of any cohesive forces. The corresponding Motility-Induced Phase Separation (…
Active particles in a tube: a generalized entropy potential approach
Yongfeng Zhao
We study the transport of self-propelled noninteracting active Brownian particles (ABPs) and run-and-tumble particles (RTPs) in long tubes of varying widths. Using a moment expansi…
Controlling cell motion and microscale flow with polarized light fields
Siyuan Yang, Mingji Huang, Yongfeng Zhao +1
We investigate how light polarization affects the motion of photo-responsive algae, \textit{Euglena gracilis}. In a uniformly polarized field, cells swim approximately perpendicula…
Surface Tensions between Active Fluids and Solid Interfaces: bare vs dressed
Ruben Zakine, Yongfeng Zhao, Miloš Knežević +4
We analyze the surface tension exerted at the interface between an active fluid and a solid boundary in terms of tangential forces. Focusing on active systems known to possess an e…
Activated escape of a self-propelled particle from a metastable state
Eric Woillez, Yongfeng Zhao, Yariv Kafri +2
We study the noise-driven escape of active Brownian particles (ABPs) and run-and-tumble particles (RTPs) from confining potentials. In the small noise limit, we provide an exact ex…
Optimized Diffusion of Run-and-Tumble Particles in Crowded Environments
Thibault Bertrand, Yongfeng Zhao, Olivier Bénichou +2
We study the transport of self-propelled particles in dynamic complex environments. To obtain exact results, we introduce a model of run-and-tumble particles (RTPs) moving in discr…