775 citations · 4.6k across the 34 of their papers we have counts for
25 papers · 1 filter
Molecular insight on ultra-confined ionic transport in wetting films: the key role of friction
Aymeric Allemand, Anne-Laure Biance, Christophe Ybert +1
Nanofluidic transport is ubiquitous in natural systems from extra-cellular communication in biology to geological phenomena, and promotes the emergence of new technologies such as…
The 2024 Motile Active Matter Roadmap
Gerhard Gompper, Howard A. Stone, Christina Kurzthaler +29
Activity and autonomous motion are fundamental aspects of many living and engineering systems. Here, the scale of biological agents covers a wide range, from nanomotors, cytoskelet…
How to steer active colloids up a vertical wall
Adérito Fins Carreira, Adam Wysocki, Christophe Ybert +3
An important challenge in active matter lies in harnessing useful global work from entities that produce work locally, e.g., via self-propulsion. We investigate here the active mat…
Aging or DEAD: origin of the non-monotonic response to weak self-propulsion in active glasses
Natsuda Klongvessa, Christophe Ybert, Cécile Cottin-Bizonne +2
Among amorphous states, glass is defined by relaxation times longer than the observation time. This nonergodic nature makes the understanding of glassy systems an involved topic, w…
Flow-Induced Shift of the Donnan Equilibrium for Ultra-Sensitive Mass Transport Measurement Through a Single Nanochannel
Simon Gravelle, Christophe Ybert
Despite mass flow is arguably the most elementary transport associated to nanofluidics, its measurement still constitutes a significant bottleneck for the development of this promi…
Nonmonotonic behavior in the dense assemblies of active colloids
Natsuda Klongvessa, Félix Ginot, Christophe Ybert +2
We study experimentally a sediment of self-propelled Brownian particles with densities ranging from dilute to ergodic supercooled, to nonergodic glass, to nonergodic polycrystal. I…
Active glass: ergodicity breaking dramatically affects response to self-propulsion
Natsuda Klongvessa, Félix Ginot, Christophe Ybert +2
We study experimentally the response of a dense sediment of Brownian particles to self-propulsion. We observe that the ergodic supercooled liquid relaxation is monotonically enhanc…
Sedimentation of self-propelled Janus colloids: polarization and pressure
Felix Ginot, Alexandre Solon, Yariv Kafri +3
We study experimentally-using Janus colloids-and theoretically-using Active Brownian Particles- the sedimentation of dilute active colloids. We first confirm the existence of an ex…
Probing the Fluctuation-Dissipation Theorem in a Perrin-like Experiment
Jean Colombani, Laure Petit, Christophe Ybert +1
In this Letter, we present a new experimental approach to investigate the effective temperature concept as a generalization of the fluctuation-dissipation theorem (FDT) for nonequi…
Carbon membranes for efficient water-ethanol separation
Simon Gravelle, Hiroaki Yoshida, Laurent Joly +2
We demonstrate, on the basis of molecular dynamics simulations, the possibility of an efficient water-ethanol separation using nanoporous carbon membranes, namely carbon nanotube m…
Environment-dependent swimming strategy of Magnetococcus marinus under magnetic field
Nicolas Waisbord, Christopher Lefèvre, Lydéric Bocquet +2
Magnetotactic bacteria (MTB) are fascinating micro-organisms which possess embodied biomineralized nanomagnets providing them the ability to orient with the Earth's magnetic field.…
Destabilization of a flow focused suspension of magnetotactic bacteria
Nicolas Waisbord, Christopher Lefevre, Lyderic Bocquet +2
Active matter is a new class of material, intrinsically out-of equilibrium with intriguing properties. So far, the recent upsurge of studies has mostly focused on the spontaneous b…
Large permeabilities of hourglass nanopores: From hydrodynamics to single file transport
Simon Gravelle, Laurent Joly, Christophe Ybert +1
In fluid transport across nanopores, there is a fundamental dissipation that arises from the connection between the pore and the macroscopic reservoirs. This entrance effect can hi…
Nonequilibrium equation of state in suspensions of active colloids
Félix Ginot, Isaac Theurkauff, Demian Levis +4
Active colloids constitute a novel class of materials composed of colloidal-scale particles locally converting chemical energy into motility, mimicking micro-organisms. Evolving fa…
Optimizing water permeability through the hourglass shape of aquaporins
Simon Gravelle, Laurent Joly, François Detcheverry +3
The ubiquitous aquaporin channels are able to conduct water across cell membranes, combining the seemingly antagonist functions of a very high selectivity with a remarkable permeab…
Dynamic clustering in active colloidal suspensions with chemical signaling
I. Theurkauff, C. Cottin-Bizonne, J. Palacci +2
In this paper, we explore experimentally the phase behavior of a dense active suspension of self- propelled colloids. In addition to a solid-like and a gas-like phase observed for…
Sedimentation of active colloidal suspensions
J. Palacci, C. Cottin-Bizonne, C. Ybert +1
In this paper, we investigate experimentally the non-equilibrium steady state of an active colloidal suspension under gravity field. The active particles are made of chemically pow…
Colloidal motility and pattern formation under rectified diffusiophoresis
J. Palacci, B. Abecassis, C. Cottin-Bizonne +2
In this letter, we characterize experimentally the diffusiophoretic motion of colloids and lambda- DNA toward higher concentration of solutes, using microfluidic technology to buil…
Making a splash with water repellency
Cyril Duez, Christophe Ybert, Christophe Clanet +1
A 'splash' is usually heard when a solid body enters water at large velocity. This phenomena originates from the formation of an air cavity resulting from the complex transient dyn…
Ion specificity and anomalous electrokinetic effects in hydrophobic nanochannels
David M. Huang, Cecile Cottin-Bizonne, Christophe Ybert +1
We demonstrate with computer simulations that anomalous electrokinetic effects, such as ion specificity and non-zero zeta potentials for uncharged surfaces, are generic features of…
Slippage of water past superhydrophobic carbon nanotube forests in microchannels
P. Joseph, C. Cottin-Bizonne, J. -M. Benoit +4
We present in this letter an experimental characterization of liquid flow slippage over superhydrophobic surfaces made of carbon nanotube forests, incorporated in microchannels. We…
Liquid friction on charged surfaces: from hydrodynamic slippage to electrokinetics
Laurent Joly, Christophe Ybert, Emmanuel Trizac +1
Hydrodynamic behavior at the vicinity of a confining wall is closely related to the friction properties of the liquid/solid interface. Here we consider, using Molecular Dynamics si…
Probing the nanohydrodynamics at liquid-solid interfaces using thermal motion
L. Joly, C. Ybert, L. Bocquet
We report on a new method to characterize nano-hydrodynamic properties at the liquid/solid interface relying solely on the measurement of the thermal motion of confined colloids. U…
Contact angle measurements on superhydrophobic Carbon Nanotube Forests : effect of fluid pressure
Catherine Journet, Sebastien Moulinet, Christophe Ybert +2
In this paper the effect of pressure on the contact angle of a water drop on superhydrophobic Carbon Nanotube (CNT) forests is studied. Superhydrophobic CNT forests are obtained fr…