Research / 2020 / Article / Fig 4

Review Article

Requirement and Development of Hydrogel Micromotors towards Biomedical Applications

Figure 4

Various motion control methods of hydrogel micromotors. (a) Velocity control of PNIPAM-modified stomatocyte hydrogel micromotors using thermosensitive PNIPAM hydrogel. Reproduced with permission from ref. [65], Springer 2017. (b) Activation of PNIPAM-Pt hydrogel micromotors by bubbles during reversible rolling of layers at different temperatures (I)~(II) (scale bars: 50 μm). Reproduced with permission from ref. [80], Wiley-VCH 2014. (c) Direction control by enclosing SPION magnetic nanoparticles in the hydrogel matrix and in a magnetic field. Reproduced with permission from ref. [72], EU 2015.