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View article: A microfluidic band-pass filter for flexible fiber separation
A microfluidic band-pass filter for flexible fiber separation Open
The control of particle trajectories in structured microfluidic environments has significantly advanced sorting technologies, most notably through deterministic lateral displacement (DLD). While previous work has largely targeted rigid, ne…
View article: Transient contacts between filaments impart its elasticity to branched actin
Transient contacts between filaments impart its elasticity to branched actin Open
Branched actin networks exert pushing forces in eukaryotic cells, and adapt their stiffness to their environment. The physical basis for their mechanics and adaptability is however not understood. Indeed, here we show that their high densi…
View article: Specific yet transient bonds between anisotropic colloids
Specific yet transient bonds between anisotropic colloids Open
Self-assembly of colloidal particles is a promising avenue to control the shape and dynamics of larger aggregates. However, achieving the necessary fine control over the dynamics and specificity of the bonds between such particles remains …
View article: Dynamics of rigid fibers interacting with triangular obstacles in microchannel flows
Dynamics of rigid fibers interacting with triangular obstacles in microchannel flows Open
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View article: Dynamics of rigid fibers interacting with triangular obstacles in microchannel flows
Dynamics of rigid fibers interacting with triangular obstacles in microchannel flows Open
Fiber suspensions flowing in structured media are encountered in many biological and industrial systems. Interactions between fibers and the transporting flow as well as fiber contact with obstacles can lead to complex dynamics. In this wo…
View article: Asymmetric bistability of chiral particle orientation in viscous shear flows
Asymmetric bistability of chiral particle orientation in viscous shear flows Open
The migration of helical particles in viscous shear flows plays a crucial role in chiral particle sorting. Attaching a nonchiral head to a helical particle leads to a rheotactic torque inducing particle reorientation. This phenomenon is re…
View article: The membrane-actin linkers ezrin, radixin, and moesin are dispensable for macrophage migration and cortex mechanics
The membrane-actin linkers ezrin, radixin, and moesin are dispensable for macrophage migration and cortex mechanics Open
The cellular actin cortex provides crucial mechanical support and plays critical roles in numerous functions, including cell division and migration. The proteins of the ERM family, ezrin, radixin, and moesin, are central to these processes…
View article: The distance between the plasma membrane and the actomyosin cortex acts as a nanogate to control cell surface mechanics
The distance between the plasma membrane and the actomyosin cortex acts as a nanogate to control cell surface mechanics Open
Animal cell shape changes are controlled by the actomyosin cortex, a peripheral actin network tethered to the plasma membrane by membrane-to-cortex attachment (MCA) proteins. Previous studies have focused on how myosin motors or actin turn…
View article: Dynamics of flexible filaments in oscillatory shear flows
Dynamics of flexible filaments in oscillatory shear flows Open
The fluid–structure interactions between flexible fibres and viscous flows play an essential role in various biological phenomena, medical problems and industrial processes. Of particular interest is the case of particles transported freel…
View article: Pitch Controls the Flexibility of Helical Ribbons
Pitch Controls the Flexibility of Helical Ribbons Open
Helical objects are often implemented in electronic or mechanical micro-systems, requiring a precise understanding of their mechanical properties. While helices formed by cylindrical filaments have been intensely investigated, little is kn…
View article: Fiber Buckling in Confined Viscous Flows: An Absolute Instability Described by the Linear Ginzburg-Landau Equation
Fiber Buckling in Confined Viscous Flows: An Absolute Instability Described by the Linear Ginzburg-Landau Equation Open
We explore the dynamics of a flexible fiber transported by a viscous flow in a Hele-Shaw cell of height comparable to the fiber height. We show that long fibers aligned with the flow experience a buckling instability. Competition between v…
View article: Shaping Nanoscale Ribbons into Microhelices of Controllable Radius and Pitch
Shaping Nanoscale Ribbons into Microhelices of Controllable Radius and Pitch Open
We report fabrication of highly flexible micron-sized helices from nanometer-thick ribbons. Building upon the helical coiling of such ultrathin ribbons mediated by surface tension, we demonstrate that the enhanced creep properties of highl…
View article: Dynamics of flexible filaments in oscillatory shear flows
Dynamics of flexible filaments in oscillatory shear flows Open
The fluid-structure interactions between flexible fibers and viscous flows play an essential role in various biological phenomena, medical problems, and industrial processes. Of particular interest is the case of particles freely transport…
View article: Shaping Nanoscale Ribbons into Micro-Helices of Controllable Radius and Pitch
Shaping Nanoscale Ribbons into Micro-Helices of Controllable Radius and Pitch Open
We report fabrication of highly flexible micron-sized helices from nanometer-thick ribbons. Building upon the helical coiling of such ultra-thin ribbons mediated by surface tension, we demonstrate that the enhanced creep properties of high…
View article: Non-linear elastic properties of actin patches to partially rescue yeast endocytosis efficiency in the absence of the cross-linker Sac6
Non-linear elastic properties of actin patches to partially rescue yeast endocytosis efficiency in the absence of the cross-linker Sac6 Open
Viscoelastic measurements of actin patches, using magnetic micro-cylinders, show that patches lacking a crosslinker are softer but stiffen with stress, allowing in some cases the build-up of elastic energy necessary for endocytosis.
View article: Correction: Non-linear elastic properties of actin patches to partially rescue yeast endocytosis efficiency in the absence of the cross-linker Sac6
Correction: Non-linear elastic properties of actin patches to partially rescue yeast endocytosis efficiency in the absence of the cross-linker Sac6 Open
Correction for ‘Non-linear elastic properties of actin patches to partially rescue yeast endocytosis efficiency in the absence of the cross-linker Sac6’ by Belbahri Reda et al. , Soft Matter , 2022, 18 , 1479–1488, https://doi.org/10.1039/…
View article: Fiber buckling in confined viscous flows: an absolute instability described by the Ginzburg-Landau equation
Fiber buckling in confined viscous flows: an absolute instability described by the Ginzburg-Landau equation Open
We explore the dynamics of a flexible fiber transported by a viscous flow in a Hele-Shaw cell of height comparable to the fiber height. We show that long fibers aligned with the flow experience a buckling instability. Competition between v…
View article: Programmed Wrapping and Assembly of Droplets with Mesoscale Polymers
Programmed Wrapping and Assembly of Droplets with Mesoscale Polymers Open
Nature is remarkably adept at using interfaces to build structures, encapsulate reagents, and regulate biological processes. Inspired by Nature, we describe flexible polymer-based ribbons, termed "mesoscale polymers" (MSPs), to modulate in…
View article: Pinching the cortex of live cells reveals thickness instabilities caused by myosin II motors
Pinching the cortex of live cells reveals thickness instabilities caused by myosin II motors Open
Magnetic beads are used as a caliper to measure the cortical layer of dendritic cells and its temporal variations.
View article: Signatures of elastoviscous buckling in the dilute rheology of stiff polymers
Signatures of elastoviscous buckling in the dilute rheology of stiff polymers Open
View article: Programmable Design and Performance of Modular Magnetic Microswimmers
Programmable Design and Performance of Modular Magnetic Microswimmers Open
Synthetic biomimetic microswimmers are promising agents for in vivo healthcare and important frameworks to advance the understanding of locomotion strategies and collective motion at the microscopic scale. Nevertheless, constructing these …
View article: Signatures of elastoviscous buckling in the dilute rheology of stiff polymers
Signatures of elastoviscous buckling in the dilute rheology of stiff polymers Open
As a stiff polymer tumbles in shear flow, it experiences compressive viscous forces that can cause it to buckle and undergo a sequence of morphological transitions with increasing flow strength. We use numerical simulations to uncover the …
View article: Pinching the cortex of live cells reveals thickness instabilities caused by Myosin II motors
Pinching the cortex of live cells reveals thickness instabilities caused by Myosin II motors Open
The cell cortex is a contractile actin meshwork, which determines cell shape and is essential for cell mechanics, migration and division. Because the cortical thickness is below optical resolution, it has been generally considered as a thi…
View article: Optimised hyperbolic microchannels for the mechanical characterisation of bio-particles
Optimised hyperbolic microchannels for the mechanical characterisation of bio-particles Open
The transport of bio-particles in viscous flows exhibits a rich variety of dynamical behaviour, such as morphological transitions, complex orientation dynamics or deformations. Characterising such complex behaviour under well controlled fl…
View article: Programmed Wrapping and Assembly of Droplets with Mesoscale Polymers
Programmed Wrapping and Assembly of Droplets with Mesoscale Polymers Open
Nature is remarkably adept at using interfaces to build structures, encapsulate reagents, and regulate biological processes. Inspired by nature, flexible polymer‐based ribbons, termed “mesoscale polymers” (MSPs), are described to modulate …