Magnetic and meniscus-effect control of catalytic rolled-up micromotors

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• 作者：Jin-Xing Li^a ; Bing-Rui Lu^a ; Zhenkui Shen^a ; Zhencheng Xu^a ; Hui Li^a ; Juanjuan Wen^a ; Zhidong Li^a ; Xin-Ping Qu^a ; Yi-fang Chen^b ; ^{y.chen@rl.ac.uk"" rel=""nofollow} ; Yongfeng Mei^c ; ^d ; ^{yfm@fudan.edu.cn"" rel=""nofollow} ; Ran Liu^a ; ^{rliu@fudan.edu.cn"" rel=""nofollow}
• 关键词：Catalytic motor ; Microtubes ; Motion control ; Rolled-up nanotech ; Meniscus-effect
• 刊名：Microelectronic Engineering
• 出版年：2011
• 出版时间：August 2011
• 年：2011
• 卷：88
• 期：8
• 页码：1792-1794
• 全文大小：633 K

文摘

Rolled-up catalytic micromotors with tubular structures are fabricated by rolling up strained Pt/Co/Ti metallic nanomembranes through selectively etching of the sacrificial lift off resist (LOR). The rolled-up micromotors present distinct motion behaviors in an organic/aqueous mixture fuel compared to those in a pure aqueous fuel. These self-propelled micromotors can move in pure aqueous fuel with a speed up to several millimeters per second. However, when placed into an organic/aqueous mixture fuel, the micromotors walk on the liquid surface. An intermediate Co layer facilitates a magnetically guided motion of these microtubular motors. The motion at the air–liquid interface can be regulated and suspended by the meniscus-climbing effect. Such meniscus-navigated motion represents a novel approach for regulation of micromotors at the air–liquid interface and opens the door to new and exciting operations of these micro-scale machines.