Figure 1.

Representative hydrogel-based thermo-responsive micromotors. (a) A microgripper shrank and grasped the cargo when the temperature was above LCST. (b) Schematic image of a thermo-responsive microgripper exhibiting reversible self-folding and unfolding architectures (top); application of a thermo-responsive microgripper in capturing and excising cells from a live cell fibroblast clump (below). Reproduced with permission from ref [50]. Copyright 2015 American Chemical Society. (c) A schematic image of an Mg/Pt-PNIPAM Janus micromotor demonstrating the process of drug loading, transporting, and releasing behaviors. Reproduced with permission from ref [54]. Copyright 2014 American Chemical Society.