Near-infrared light-driven Janus capsule motors： Fabrication, propulsion, and simulation  

作　　者：Yingjie Wu Tieyan Si Jingxin Shao Zhiguang Wu Qiang He 

机构地区：[1]Key Laboratory of Microsystems and Microstructures Manufacturing, Ministry of Education, Micro/Nanotechnology Research Centre,Harbin Institute of Technology, Yi Kuang Jie 2, Harbin 150080, China

出　　处：《Nano Research》2016年第12期3747-3756,共10页纳米研究（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China （No. 21573053）. The project was supported by State Key Laboratory of Advanced Technology for Materials Synthesis and Processing （Wuhan University of Technology）.

摘　　要：We report a fuel-free, near-infrared （NIR）-driven Janus microcapsule motor. The Janus microcapsule motors were fabricated by template-assisted polyelectrolyte layer-by-layer assembly, followed by spraying of a gold layer on one side. The NIR-powered Janus motors achieved high propulsion with a maximum speed of 42μm.s-1 in water. The propulsion mechanism of the Janus motor was attributed to the self-thermophoresis effect： The asymmetric distribution of the gold layer generated a local thermal gradient, which in turn generated thermophoretic force to propel the Janus motor. Such NIR-propelled Janus capsule motors can move efficiently in cell culture medium and have no obvious effects on the cell at the power of the NIR laser, indicating considerable promise for future biomedical applications.We report a fuel-free, near-infrared （NIR）-driven Janus microcapsule motor. The Janus microcapsule motors were fabricated by template-assisted polyelectrolyte layer-by-layer assembly, followed by spraying of a gold layer on one side. The NIR-powered Janus motors achieved high propulsion with a maximum speed of 42μm.s-1 in water. The propulsion mechanism of the Janus motor was attributed to the self-thermophoresis effect： The asymmetric distribution of the gold layer generated a local thermal gradient, which in turn generated thermophoretic force to propel the Janus motor. Such NIR-propelled Janus capsule motors can move efficiently in cell culture medium and have no obvious effects on the cell at the power of the NIR laser, indicating considerable promise for future biomedical applications.

关 键 词：layer-by-layer assembly Janus micromotor light-driven active targeting photothermal effect 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置] TS202.3[自动化与计算机技术—控制科学与工程]