43 citations · 93 across the 16 of their papers we have counts for
17 papers
Topology of Nonequilibrium Currents Controls Active Transport
A. Escobar, G. Geva, A. Alexander-Katz +3
Structured environments repeatedly redirect active particles, producing transport pathways that cannot be readily inferred from individual trajectories. Here, we show that the larg…
Programmable transport of rotating particles in obstacle arrays
Marcos Puerto, Alfredo Alexander-Katz, Juan L. Aragones +1
Rotating colloids, or spinners, in obstacle arrays exhibit frequency-set stationary orbits and currents set by the competition between an inertial, Magnus-like lift and short-range…
Rolling, sliding and trapping of driven particles in square obstacle lattices
Galor Geva, Arin Escobar, Paula Magrinya +4
Transport phenomena in complex and dynamic microscopic environments are fundamentally shaped by hydrodynamic interactions. In particular, microparticle transport in porous media is…
Rolling vesicles: From confined rotational flows to surface-enabled motion
Paula Magrinya, Pablo Palacios, Pablo Llombart +4
The interaction of surfaces in relative motion in wet environments is dominated by lubrication forces, which play a pivotal role in the dynamics of microscopic systems. Here, we de…
Simple Calibration of Block Copolymer Melt Models
Artem Petrov, Hejin Huang, Alfredo Alexander-Katz
According to the universality hypothesis, the phase behavior of different block copolymer melt models having fixed composition depends solely on two parameters: the invariant chain…
Symmetry-Breaking and Self-Sorting in Block Copolymer-based Multicomponent Nanocomposites
Le Ma, Hejin Huang, Peter Ercius +2
Co-assembly of inorganic nanoparticles (NPs) and nanostructured polymer matrix represents an intricate interplay of enthalpic or entropic forces. Particle size largely affects the…
Metamaterials for Active Colloid Transport
Shahrzad Yazdi, Juan L. Aragones, Jennifer Coulter +1
Transport phenomena in out-of-equilibrium systems is immensely important in a myriad of applications in biology, engineering and physics. Complex environments, such as the cytoplas…
Dissipative Particle Dynamics for Directed Self-Assembly of Block Copolymers
Hejin Huang, Alfredo Alexander-Katz
The dissipative particle dynamics (DPD) simulation method has been shown to be a promising tool to study self-assembly of soft matter systems. In particular, it has been used to st…
Self-assembly of cylinder forming diblock copolymers on modulated substrates: a simulation study
Karim Gadelrab, Alfredo Alexander-Katz
Self-consistent field theory (SCFT) and strong segregation theory (SST) are used to explore the parameter space governing the self-assembly of cylinder forming block copolymers (BC…
Diffusion of self-propelled particles in complex media
Juan L. Aragones, Shahrzad Yazdi, Alfredo Alexander-Katz
The diffusion of active microscopic organisms in complex environments plays an important role in a wide range of biological phenomena from cell colony growth to single organism tra…
Anisotropic nanoparticle distribution in block copolymer model defects
YongJoo Kim, Alfredo Alexander-Katz
In this article, we study the thermodynamic behavior of anisotropic shape (rod and disk) nanoparticle within the block copolymer matrix by using self-consistent field theory (SCFT)…
Aggregation Dynamics of Active Rotating Particles in Dense Passive Media
Juan L. Aragones, Joshua P. Steimel, Alfredo Alexander-Katz
Active matter systems are able to exhibit emergent non-equilibrium states due to activity-induced effective interactions between the active particles. Here we study the aggregation…
Elasticity Induced Force Reversal Between Active Spinning Particles in Dense Passive Media
J. L. Aragones, J. P. Steimel, A. Alexander-Katz
The self-organization of active particles is governed by their dynamic effective interactions. Such interactions are controlled by the medium in which such active agents reside. He…
Dynamical bond cooperativity enables very fast and strong binding between sliding surfaces
Jørgen Kjoshagen Trømborg, Alfredo Alexander-Katz
Cooperative binding affects many processes in biology, but it is commonly addressed only in equilibrium. In this work we explore dynamical cooperativity in driven systems, where th…
Artificial Tribotactic Microscopic Walkers
Joshua P. Steimel, Juan L. Aragones, Alfredo Alexander-Katz
Friction, the resistive force between two surfaces sliding past each other, is at the core of a wide diversity of locomotion schemes. While such schemes are somewhat understood for…
Conformational dynamics and internal friction in homo-polymer globules: equilibrium vs. non-equilibrium simulations
Thomas R. Einert, Charles E. Sing, Alfredo Alexander-Katz +1
We study the conformational dynamics within homo-polymer globules by solvent-implicit Brownian dynamics simulations. A strong dependence of the internal chain dynamics on the Lenna…
Motion-reversal in a simple microscopic swimmer
A. Alexander-Katz
We study the motion of a microscopic swimmer composed of a semiflexible polymer anchored at the surface of a magnetic sphere using hydrodynamic simulations and scaling arguments. T…