80 citations · 373 across the 33 of their papers we have counts for
21 papers · 1 filter
Diffusion of charged rods across 3D varying section channels
N. Ray, A. Semkiv, J. Harting +1
We analyze the transport of rod-like particles by diffusion and drift in a three-dimensional channel with varying circular or elliptic cross section. Applying the Fick-Jacobs appro…
Free-Energy Analysis of Bubble Nucleation on Electrocatalytic Surfaces
Qingguang Xie, Paolo Malgaretti, Othmane Aouane +2
Bubble nucleation at catalyst surfaces plays a critical role in the operation of electrolyzers. However, achieving controlled bubble nucleation remains challenging due to limited u…
Zigzagging Diffusion and Non-Standard Transport in Particle-laden Nanopores Under Extreme Confinement
A. Baer, P. Malgaretti, K. Hoellring +2
Understanding transport subject to molecular-scale confinement is key to advancing nanofluidics, yet classical hydrodynamic laws often fail at these scales. Here, we study a model…
Enhancement of bubble transport in porous electrodes and catalysts
Thomas Scheel, Paolo Malgaretti, Jens Harting
We investigate the formation and transport of gas bubbles across a model porous catalyst/electrode using lattice Boltzmann simulations. This approach enables us to systematically e…
Chemically reactive thin films: dynamics and stability
Tilman Richter, Paolo Malgaretti, Thomas M. Koller +1
Catalyst particles or complexes suspended in liquid films can trigger chemical reactions leading to inhomogeneous concentrations of reactants and products in the film. We demonstra…
Turning catalytically active pores into active pumps
G. C. Antunes, P. Malgaretti, J. Harting
We develop a semi-analytical model of self-diffusioosmotic transport in active pores, which includes advective transport and the inverse chemical reaction which consumes solute. In…
Surface viscosity in simple liquids
Paolo Malgaretti, Ubaldo Bafile, Renzo Vallauri +2
The response of Newtonian liquids to small perturbations is usually considered to be fully described by homogeneous transport coefficients like shear and dilatational viscosity. Ho…
Splitting probabilities for dynamics in corrugated channels: passive VS active Brownian motion
P. Malgaretti, T. Nizkaia, G. Oshanin
In many practically important problems which rely on particles' transport in realistic corrugated channels, one is interested to know the probability that either of the extremities…
Closed formula for the transport of micro-nano-particle across model porous media
P. Malgaretti, J. Harting
In the last decade the Fick-Jacobs approximation has been exploited to capture the transport across constrictions. Here, we review the derivation of the Fick-Jacobs equation with p…
Resolving the microscopic hydrodynamics at the moving contact line
Amal K. Giri, Paolo Malgaretti, Dirk Peschka +1
The molecular structure of moving contact lines (MCLs) and the emergence of a corresponding macroscopic dissipation have made the MCL a paradigm of fluid dynamics. Through novel av…
Szilard engines and information-based work extraction for active systems
P. Malgaretti, H. Stark
The out of equilibrium nature of active systems can be exploited for the design of information-based engines. We design two types of an active Szilard engine that use a Maxwell dae…
Pumping and mixing in active pores
G. C. Antunes, P. Malgaretti, J. Harting +1
We show both numerically and analytically that a chemically patterned active pore can act as a micro/nano-pump for fluids, even if it is fore-aft symmetric. This is possible due to…
Phoretic colloids close to and trapped at fluid interfaces
Paolo Malgaretti, Jens Harting
The active motion of phoretic colloids leads them to accumulate at boundaries and interfaces. Such an excess accumulation, with respect to their passive counterparts, makes the dyn…
Active polymer rings: activity-induced collapse and dynamical arrest
Emanuele Locatelli, Valentino Bianco, Paolo Malgaretti
We investigate, using numerical simulations, the conformations of isolated active ring polymers. We find that the their behaviour depends crucially on their size: short rings ($N \…
Transport of neutral and charged nanorods across varying-section channels
Paolo Malgaretti, Jens Harting
We study the dynamics of neutral and charged rods embedded in varying-section channels. By means of systematic approximations, we derive the dependence of the local diffusion coeff…
Mechanical pressure and work cycle of confined active Brownian particles
Paolo Malgaretti, Piotr Nowakowski, Holger Stark
We derive an analytic expression for the mechanical pressure of a generic one-dimensional model of confined active Brownian particles (ABPs) that is valid for all values of Peclet…
Order and Information in the Patterns of Spinning Magnetic Micro-disks at the Air-water Interface
Wendong Wang, Gaurav Gardi, Paolo Malgaretti +9
The application of the Shannon entropy to study the relationship between information and structures has yielded insights into molecular and material systems. However, the difficult…
Polymer translocation across a corrugated channel: Fick-Jacobs approximation extended beyond the mean first passage time
Paolo Malgaretti, Gleb Oshanin
Polymer translocation across a corrugated channel is a paradigmatic stochastic process encountered in diverse systems. The instance of time when a polymer first arrives to some pre…
Active microrheology in corrugated channels
Antonio M. Puertas, Paolo Malgaretti, Ignacio Pagonabarraga
We analyze the dynamics of a tracer particle embedded in a bath of hard spheres confined in a channel of varying section. By means of Brownian dynamics simulations we apply a const…
Model microswimmers in channels with varying cross section
Paolo Malgaretti, Holger Stark
We study different types of microswimmers moving in channels with varying cross section and thereby interacting hydrodynamically with the channel walls. Starting from the Smoluchow…
Effective interaction between active colloids and fluid interfaces induced by Marangoni flows
Alvaro Domínguez, Paolo Malgaretti, Mihail N. Popescu +1
We show theoretically that near a fluid-fluid interface a single active colloidal particle generating, e.g., chemicals or a temperature gradient experiences an effective force of h…