104 citations · 472 across the 16 of their papers we have counts for
16 papers
Collective dynamics of trail-interacting particles
Paul Pineau, Samuel Bell, Raphaël Voituriez +1
Trail interactions occur when past particle trajectories bias future motion, rendering the system out of thermodynamic equilibrium. While such systems are abundant in nature, their…
Active flow-driven DNA remodeling generates millimeter-scale mechanical oscillations
Maya Levanon, Noa S. Goldberg, Dvir Cohen +3
In living systems, DNA undergoes continuous and rhythmic mechanical remodeling through condensation, looping, and disentangling to regulate gene expression, segregate chromosomes,…
Theory of cell size regulation during migration in adhered cells
Jonathan E. Ron, Ram M. Adar
Cell migration is closely linked to cell shape, yet cell size is often assumed to remain constant. This assumption is challenged by recent experiments showing that cells undergo vo…
Separation of ionic timescales explains dynamics of cellular volume regulation
Ram M. Adar
Living cells actively regulate their volume in response to changes in the extra-cellular environment, such as osmolarity and chemo-attractant concentration. While the basic physica…
Environment-stored memory in active nematics and extra-cellular matrix remodeling
Ram M. Adar, Jean-François Joanny
Many active systems display nematic order, while interacting with their environment. In this work, we show theoretically how environment-stored memory acts an effective external fi…
Active-gel Theory for Multicellular Migration of Polar Cells in the Extra-cellular Matrix
Ram M. Adar, Jean-François Joanny
We formulate an active-gel theory for multicellular migration in the extra-cellular matrix (ECM). The cells are modeled as an active, polar solvent, and the ECM as a viscoelastic s…
Conductivity of Concentrated Electrolytes
Yael Avni, Ram M. Adar, David Andelman +1
The conductivity of ionic solutions is arguably their most important trait, being widely used in electrochemical, biochemical, and environmental applications. The Debye-Hückel-Onsa…
Permeation Instabilities in Active, Polar Gels
Ram M. Adar, Jean-François Joanny
We present a theory of active, permeating, polar gels, based on a two-fluid model. An active relative force between the gel components creates a steady-state current. We analyze it…
Charge Oscillations in Ionic Liquids: A Microscopic Cluster Model
Yael Avni, Ram M. Adar, David Andelman
In spite of their enormous applications as alternative energy storage devices and lubricants, room temperature ionic liquids (ILs) still pose many challenges from a pure scientific…
Screening length for finite-size ions in concentrated electrolytes
Ram M. Adar, Samuel A. Safran, Haim Diamant +1
The classical Debye-Huckel (DH) theory clearly accounts for the origin of screening in electrolyte solutions and works rather well for dilute electrolyte solutions. While the Debye…
Linear response functions of an electrolyte solution in a uniform flow
Ram M. Adar, Yuki Uematsu, Shigeyuki Komura +1
We study the steady state response of a dilute monovalent electrolyte solution to an external source with a constant relative velocity with respect to the fluid. The source is take…
Dielectric Constant of Ionic Solutions: Combined Effects of Correlations and Excluded Volume
Ram M. Adar, Tomer Markovich, Amir Levy +2
The dielectric constant of ionic solutions is known to reduce with increasing ionic concentrations. However, the origin of this effect has not been thoroughly explored. In this pap…
Osmotic pressure between arbitrarily charged surfaces: a revisited approach
Ram M. Adar, David Andelman
The properties of ionic solutions between charged surfaces are often studied within the Poisson-Boltzmann framework, by finding the electrostatic potential profile. For example, th…
Bjerrum Pairs in Ionic Solutions: a Poisson-Boltzmann Approach
Ram M. Adar, Tomer Markovich, David Andelman
Ionic solutions are often regarded as fully dissociated ions dispersed in a polar solvent. While this picture holds for dilute solutions, at higher ionic concentrations, oppositely…
Electrostatics of Patchy Surfaces
Ram M. Adar, David Andelman, Haim Diamant
In the study of colloidal, biological and electrochemical systems, it is customary to treat surfaces, macromolecules and electrodes as homogeneously charged. This simplified approa…
Electrostatic Attraction between Overall Neutral Surfaces
Ram M. Adar, David Andelman, Haim Diamant
Two overall neutral surfaces with positive and negative charged domains ("patches") have been shown in recent experiments to exhibit long-range attraction when immersed in an ionic…