Magnetic Quincke rollers with tunable single-particle dynamics and collective states

被引：10

作者：

Garza, Ricardo Reyes ^{[1
]}

Kyriakopoulos, Nikos ^{[1
]}

Cenev, Zoran M. ^{[1
]}

Rigoni, Carlo ^{[1
]}

Timonen, Jaakko V. I. ^{[1
]}

机构：

[1] Aalto Univ, Dept Appl Phys, Sch Sci, POB 15100, FI-02150 Espoo, Finland

来源：

SCIENCE ADVANCES | 2023年 / 9卷 / 26期

基金：

欧洲研究理事会; 芬兰科学院;

关键词：

COLLOIDS;

D O I：

10.1126/sciadv.adh2522

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Electrohydrodynamically driven active particles based on Quincke rotation have quickly become an important model system for emergent collective behavior in nonequilibrium colloidal systems. Like most active particles, Quincke rollers are intrinsically nonmagnetic, preventing the use of magnetic fields to control their complex dynamics on the fly. Here, we report on magnetic Quincke rollers based on silica particles doped with super-paramagnetic iron oxide nanoparticles. We show that their magnetic nature enables the application of both externally controllable forces and torques at high spatial and temporal precision, leading to several versatile control mechanisms for their single-particle dynamics and collective states. These include tunable interparticle interactions, potential energy landscapes, and advanced programmable and teleoperated behaviors, allowing us to discover and probe active chaining, anisotropic active sedimentation-diffusion equilibria, and collective states in various geometries and dimensionalities.

引用

页数：8

共 48 条

[41] Biological Magnetometry: Torque on Superparamagnetic Beads in Magnetic Fields [J].