首页|Morphology-Tailored Dynamic State Transition in Active-Passive Colloidal Assemblies

Morphology-Tailored Dynamic State Transition in Active-Passive Colloidal Assemblies

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Mixtures of active self-propelled and passive colloidal particles promise rich assembly and dynamic states that are beyond reach via equilibrium routes.Yet,controllable transition between different dynamic states remains rare.Here,we reveal a plethora of dynamic behaviors emerging in assemblies of chemically propelled snowman-like active colloids and passive spherical particles as the particle shape,size,and composition are tuned.For example,assembles of one or more active colloids with one passive particle exhibit distinct translating or orbiting states while those composed of one active colloid with 2 passive particles display persistent"8"-like cyclic motion or hopping between circling states around one passive particle in the plane and around the waist of 2 passive ones out of the plane,controlled by the shape of the active colloid and the size of the passive particles,respectively.These morphology-tailored dynamic transitions are in excellent agreement with state diagrams predicted by mesoscale dynamics simulations.Our work discloses new dynamic states and corresponding transition strategies,which promise new applications of active systems such as micromachines with functions that are otherwise impossible.

Nan Yu、Zameer H.Shah、Mingcheng Yang、Yongxiang Gao

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Institute for Advanced Study,Shenzhen University,518060,Shenzhen,China

Key Laboratory of Optoelectronic Device and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,518060,Shenzhen,China

Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China

Songshan Lake Materials Laboratory,Dongguan,Guangdong 523808,China

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2024

10.34133/research.0304

研究(英文)

研究(英文)

CSTPCD
ISSN：
年,卷(期)：2024.2024(3)