Figure 2: Chemical structure of components.

(a) The rigid anionic polyelectrolyte, PBDT, which is embedded in hydrogel matrix. (b) The flexible cationic polyelectrolyte, PDMAPAA-Q, which forms a hydrogel network by chemically crosslinking.
(a) The rigid anionic polyelectrolyte, PBDT, which is embedded in hydrogel matrix. (b) The flexible cationic polyelectrolyte, PDMAPAA-Q, which forms a hydrogel network by chemically crosslinking.