Hydrogel-Based Iontronics on a Polydimethylsiloxane Microchip

• DOI: 10.1021/acsami.0c19892
• Publication Date: 2021-01-26T14:10:13Z
• Authors: Seok Hee Han; Sung Il Kim; Hae-Ryung Lee; Seung-Min Lim; Song Yi Yeon; Min-Ah Oh; Sunmi Lee; Jeong-Yun Sun; Young-Chang Joo; Taek Dong Chung
• Keywords: Polydimethylsiloxane; Microchannel

In response to the extensive utilization of ionic circuits, including in iontronics and wearable devices, a new method for fabricating hydrogel-based circuit on polydimethylsiloxane (PDMS) microchip is reported. Prolonged UV/ozone oxidation combined with proper surface functionalizations novel bonding using thiol-epoxy click reaction enable robust attachment photopolymerized hydrogel microchannel eventual operation electrolytes as an circuit. The stretchable diode constructed PDMS shows superior rectification ratio even under tensile stress long-term storage stability. Furthermore, combination unique material properties allows us maximize versatility diversify functionalities iontronic device, demonstrated pressure-driven switch chip-integrated regulator. Its signal transmission mimicking excitatory inhibitory synapses also evinces potential developed toward aqueous neuromimetic information processor while opening up opportunities various bioinspired applications.