126 citations · 530 across the 23 of their papers we have counts for
20 papers · 1 filter
Transition between ground states in square anisotropic artificial colloidal ice
Leonardo G. Alanis-Cantú, Antonio Ortiz-Ambriz
In Artificial Colloidal Ice (ACI), paramagnetic colloidal particles are confined in double-well traps and interact via repulsive, isotropic, magnetic dipole-dipole interactions tha…
Anisotropic interactions induce dynamical arrest in artificial colloidal ice
Leonardo G. Alanis-Cantú, Antonio Ortiz-Ambriz
Artificial Colloidal Ice is an ice-like system used to study the effects of frustration in controlled environments where all degrees of freedom can be accessed at a length-scale la…
Curvature induces and enhances transport of spinning colloids through narrow channels
Eric Cereceda-López, Marco De Corato, Ignacio Pagonabarraga +3
The effect of curvature and how it induces and enhances the transport of colloidal particles driven through narrow channels represent an unexplored research avenue. Here we combine…
Excluded Volume Induces Buckling in Optically Driven Colloidal Rings
Eric Cereceda-Lóopez, Mattia Ostinato, Antonio Ortiz-Ambriz +3
In our combined experimental, theoretical and numerical work, we study the out of equilibrium deformations in a shrinking ring of optically trapped, interacting colloidal particles…
Ice Rule Breakdown and frustrated antiferrotoroidicity in an artificial colloidal Cairo ice
Carolina Rodríguez-Gallo, Antonio Ortiz-Ambriz, Cristiano Nisoli +1
We combine experiments and numerical simulations to investigate the low energy states and the emergence of topological defects in an artificial colloidal ice in the Cairo geometry.…
Hydrodynamic interactions hinder transport of flow-driven colloidal particles
Dominik Lips, Eric Cereceda-López, Antonio Ortiz-Ambriz +3
The flow-driven transport of interacting micron-sized particles occurs in many soft matter systems spanning from the translocation of proteins to moving emulsions in microfluidic d…
Hydrodynamic interactions can induce jamming in flow-driven systems
Eric Cereceda-López, Dominik Lips, Antonio Ortiz-Ambriz +3
Hydrodynamic interactions between fluid-dispersed particles are ubiquitous in soft matter and biological systems and they give rise to intriguing collective phenomena. While it was…
Single-file dynamics of colloids in circular channels: time scales, scaling laws and their universality
Alejandro Villada-Balbuena, Antonio Ortiz-Ambriz, Pavel Castro-Villarreal +3
In colloidal systems, Brownian motion emerges from the massive separation of time and length scales associated to characteristic dynamics of the solute and solvent constituents. Th…
Topological Boundary Constraints in Artificial Colloidal Ice
Carolina Rodríguez-Gallo, Antonio Ortiz-Ambriz, Pietro Tierno
The effect of boundaries and how these can be used to influence the bulk behaviour in geometrically frustrated systems are both long-standing puzzles, often relegated to secondary…
Dynamical modes of sheared confined microscale matter
Sascha Gerloff, Antonio Ortiz-Ambriz, Pietro Tierno +1
Based on (overdamped) Stokesian dynamics simulations and video microscopy experiments, we study the non equilibrium dynamics of a sheared colloidal cluster, which is confined to a…
Propulsion and energetics of a minimal magnetic microswimmer
Carles Calero, José García-Torres, Antonio Ortiz-Ambriz +3
In this manuscript we describe the realization of a minimal hybrid microswimmer, composed of a ferromagnetic nanorod and a paramagnetic microsphere. The unbounded pair is propelled…
Topology Restricts Quasidegeneracy in Sheared Square Colloidal Ice
Erdal C. Oğuz, Antonio Ortiz-Ambriz, Hadas Shem-Tov +3
Recovery of ground-state degeneracy in two-dimensional square ice is a significant challenge in the field of geometric frustration with far-reaching fundamental implications, such…
Emergent colloidal edge currents generated via exchange dynamics in a broken dimer state
Helena Massana-Cid, Antonio Ortiz-Ambriz, Andrej Vilfan +1
Controlling the flow of matter down to micrometer-scale confinement is of central importance in materials and environmental sciences, with direct applications in nano-microfluidics…
Direct Measurement of Lighthill's Energetic Efficiency of a Minimal Magnetic Microswimmer
Carles Calero, José García-Torres, Antonio Ortiz-Ambriz +3
The realization of artificial microscopic swimmers able to propel in viscous fluids is an emergent research field of fundamental interest and vast technological applications. For c…
Ice Rule and Emergent Frustration in Particle Ice and Beyond
Antonio Ortiz-Ambriz, Cristiano Nisoli, Charles Reichhardt +2
Geometric frustration and the ice rule are two concepts that are intimately connected and widespread across condensed matter. The first refers to the inability of a system to satis…
Laning, Thinning and Thickening of Sheared Colloids in a Two-dimensional Taylor-Couette Geometry
Antonio Ortiz-Ambriz, Sascha Gerloff, Sabine H. L. Klapp +2
We investigate the dynamics and rheological properties of a circular colloidal cluster that is continuously sheared by magnetic and optical torques in a two-dimensional (2D) Taylor…
Emergent Hydrodynamic Bound States Between Magnetically Powered Micropropellers
Fernando Martinez-Pedrero, Eloy Navarro-Argemi, Antonio Ortiz-Ambriz +2
Hydrodynamic interactions (HIs), namely solvent mediated long-range interactions between dispersed particles, play a crucial role in the assembly and dynamics of many active system…
Defect Dynamics in Artificial Colloidal Ice: Real-Time Observation, Manipulation and Logic Gate
Johannes Loehr, Antonio Ortiz-Ambriz, Pietro Tierno
We study the defect dynamics in a colloidal spin ice system realized by filling a square lattice of topographic double well islands with repulsively interacting magnetic colloids.…
Engineering of frustration in colloidal artificial ices realized on microfeatured grooved lattices
Antonio Ortiz-Ambriz, Pietro Tierno
Artificial spin ice systems, namely lattices of interacting single domain ferromagnetic islands, have been used to date as microscopic models of frustration induced by lattice topo…
Colloidal Microworms Propelling via a Cooperative Hydrodynamic Conveyor Belt
Fernando Martinez-Pedrero, Antonio Ortiz-Ambriz, Ignacio Pagonabarraga +1
We study propulsion arising from microscopic colloidal rotors dynamically assembled and driven in a viscous fluid upon application of an elliptically polarized rotating magnetic fi…