Figure 1
From: Hydrogel Walkers with Electro-Driven Motility for Cargo Transport

Strategy for fabricating the poly(AMPS-co-AAm) hydrogel walkers.
(a–f) Fabrication process. First, a mould is assembled with a Teflon plate, a Teflon spacer and a quartz glass plate (a). Then, monomer solution is injected into the mould (b) for UV-initiated polymerization (c). Next, the prepared hydrogel was taken out from the disassembled mould (d) and then cut into strips (e) as hydrogel walkers (f). (g) Optical photo that showing a hydrogel walker at stretch state. All of the drawing components in the figure are created by Chao Yang.