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

详细信息    查看全文

• 作者：Yingjie Wu ; Tieyan Si ; Jingxin Shao ; Zhiguang Wu ; Qiang He
• 关键词：layer ; by ; layer assembly ; Janus micromotor ; light ; driven ; active targeting ; photothermal effect
• 刊名：Nano Research
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：9
• 期：12
• 页码：3747-3756
• 全文大小：1,881 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chinese Library of Science
  Chemistry
  Nanotechnology
  
• 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
• ISSN：1998-0000
• 卷排序：9

文摘

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 µm·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.