活性物质
趋化性
化学物理
纳米技术
材料科学
光子学
非平衡态热力学
胶体
化学
化学工程
物理
光电子学
工程类
生物
细胞生物学
受体
量子力学
生物化学
作者
Muhammad Ikram,Guogan Peng,Qadeer Ul Hassan,Majid Basharat,Yurou Li,Shah Zeb,Yongxiang Gao
出处
期刊:Small
[Wiley]
日期:2023-04-24
卷期号:19 (34)
被引量:2
标识
DOI:10.1002/smll.202301625
摘要
Microorganisms display nonequilibrium predator-prey behaviors, such as chasing-escaping and schooling via chemotactic interactions. Even though artificial systems have revealed such biomimetic behaviors, switching between them by control over chemotactic interactions is rare. Here, a spindle-like iron-based metal-organic framework (MOF) colloidal motor which self-propels in glucose and H2 O2 , triggered by UV light is reported. These motors display intrinsic UV light-triggered fuel-dependent chemotactic interactions, which are used to tailor the collective dynamics of active-passive colloidal mixtures. In particular, the mixtures of active MOF motors with passive colloids exhibit distinctive "chasing-escaping" or "schooling" behaviors, depending on glucose or hydrogen peroxide being used as the fuel. The transition in the collective behaviors is attributed to an alteration in the sign of ionic diffusiophoretic interactions, resulting from a change in the ionic clouds produced. This study offers a new strategy on tuning the communication between active and passive colloids, which holds substantial potentials for fundamental research in active matter and practical applications in cargo delivery, chemical sensing, and particle segregation.
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