Light-Programmable Assemblies of Isotropic Micromotors  

作　　者：Shengping Che Jianhua Zhang Fangzhi Mou Xia Guo Joshua E.Kauffman Ayusman Sen Jianguo Guan 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,International School of Materials Science and Engineering,Wuhan University of Technology,122Luoshi Road,Wuhan 430070,China [2]Department of Chemistry,The Pennsylvania State University,University Park,PA16802,USA

出　　处：《Research》2022年第4期481-492,共12页研究（英文）

基　　金：This work was supported by the National Natural Science Foundation of China(21875175 and 52073222);Natural Science Foundation of Hubei Province(2019CFA048).

摘　　要：“Life-like”nonequilibrium assemblies are of increasing significance,but suffering from limited steerability as they are generally based on micro/nanomotors with inherent asymmetry in chemical composition or geometry,of which the vigorous random Brownian rotations disturb the local interactions.Here,we demonstrate that isotropic photocatalytic micromotors,due to the persistent phoretic flow from the lluminated to shadowed side rrespective of their Brownian rotations,experience lightprogrammable local interactions(reversibly from atraction to repulsion and/or alignment)depending on the direction of the incident lights.Thus,they can be organized into a variety of tunable nonequilibrium assemblies,such as apolar solids(i.e.,immobile colloidal crystal),polar liquids(ie.,phototactic colloidal stream),and polar solids(i.e.,phototactic colloidal crystal),which can further be“cut”into a predesigned pattern by utilizing the switching motor-motor interactions at superimposedlight edges.This work facilitates the development of active matters and motile functional microdevices.

关 键 词：BROWNIAN ROTATION NONEQUILIBRIUM 

分 类 号：O61[理学—无机化学]