RT Journal Article
T1 Static and Dynamic Self‐Assembly of Pearl‐Like‐Chains of Magnetic Colloids Confined at Fluid Interfaces
A1 Martínez Pedrero, Fernando
A1 González Banciella, Andrés
A1 Camino, Alba
A1 Mateos Maroto, Ana
A1 Ortega Gómez, Francisco
A1 González Rubio, Ramón
A1 Pagonabarraga, Ignacio
A1 Calero, Carles
AB Magnetic colloids adsorbed at a fluid interface are unique model systems to understand self-assembly in confined environments, both in equilibrium and out of equilibrium, with important potential applications. In this work the pearl-chain-like self-assembled structures of superparamagnetic colloids confined to a fluid–fluid interface under static and time-dependent actuations are investigated. On the one hand, it is found that the structures generated by static fields transform as the tilt angle of the field with the interface is increased, from 2D crystals to separated pearl-chains in a process that occurs through a controllable and reversible zip-like thermally activated mechanism. On the other hand, the actuation with precessing fields about the axis perpendicular to the interface induces dynamic self-assembled structures with no counterpart in non-confined systems, generated by the interplay of averaged magnetic interactions, interfacial forces, and hydrodynamics. Finally, how these dynamic structures can be used as remotely activated roller conveyors, able to transport passive colloidal cargos at fluid interfaces and generate parallel viscous flows is shown. The latter can be used in the mixture of adsorbed molecules and the acceleration of surface-chemical reactions, overcoming diffusion limitations.
PB Wiley
SN 1613-6810
YR 2021
FD 2021-05-21
LK https://hdl.handle.net/20.500.14352/6782
UL https://hdl.handle.net/20.500.14352/6782
LA eng
NO CRUE-CSIC (Acuerdos Transformativos 2021)
NO Unión Europea. Horizonte 2020
NO Ministerio de Ciencia e Innovación (MICINN)
NO Ministerio de Economía y Competitividad (MINECO)
NO Universidad Complutense de Madrid/Banco de Santander
DS Docta Complutense
RD 11 abr 2025