Figure 4.

Hydrogel-mediated aqueous-phase transfer printing. (a) The adhesive elements in mussel foot proteins (mfps) can be recapitulated in synthetic hydrogel precursors containing L-3,4-dihydroxyphenylalanine (DOPA) groups. (b) (Top) Schematic representation and (bottom) experimental observation illustrating the mechanisms composed of three processes that enable one-step transfer printing multielectrode structure to catechol-bearing adhesive hydrogels. (c) Photographs of hydrogel-based electrodes during sol-gel phase transitions and integration with microelectronics. Reprinted with permission from Reference 96. © 2018 Wiley.