Supporting Information
Preparation, heat enabled shape variation and cargo
manipulation of polymer-based micromotors
Limei Liu, Mei Liu, Yonggang Dong, Wei Zhou, Lina Zhang, Yajun Su, Hui Zhang, Bin Dong*
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based
Functional Materials & Devices and Collaborative Innovation Center (CIC) of Suzhou Nano Science
and Technology, Soochow University, Suzhou 215123 (P. R. China), E-mail: bdong@suda.edu.cn
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Video S1 The autonomous motion of several sheet-like micromotors in H2O2 aqueous solution at 22
˚C.
Video S2 The autonomous motion showing one sheet-like micromotor.
Video S3 The shape variation process of the sheet-like structure under the influence of heat at 40 ˚C.
Video S4 The motion of several sphere-like micromotors in H2O2 aqueous solution at 22 ˚C.
Video S5 The motion showing one sphere-like micromotors.
Video S6 A sphere-like micromotor moves toward a polystyrene microbead guided by an external
magnetic field in deionized water at 40 ˚C. Due to the stickiness of the softened PCL, this micromotor
can successfully capture the polystyrene microbead.
Video S7 A sphere-like micromotor departs from the captured polystyrene microbead under the
influence of an external magnetic field in deionized water at 22 ˚C. Because the stickiness of PCL is
minimized at room temperature, this micromotor releases the polystyrene microbead cargo.
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Fig. S1 (a) Optical microscope image of the sheet-like micromotors. (b) AFM image of a typical sheetlike micromotor. (c) The corresponding section analysis of (b).
Fig. S2 (a) Influence of the polymeric solution concentration on the size and thickness of the resulting
micromotor when the spin coating speed and sonication time are fixed at 2000 rpm and 25 min,
respectively. (b) Effect of spin coating speed on the size and thickness of the micromotor at fixed
polymer solution concentration (2 wt %) and sonication time (25 min). (c) Micromotor size obtained at
different sonication time when the polymer solution concentration (2 wt %) and spin coating speed
(2000 rpm) are kept constant.
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