期刊
NANO RESEARCH
卷 9, 期 12, 页码 3747-3756出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1245-0
关键词
layer-by-layer assembly; Janus micromotor; light-driven; active targeting; photothermal effect
类别
资金
- National Natural Science Foundation of China [21573053]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology)
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 42 A mu m center dot 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.
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