Direct Patterning of Highly Conductive PEDOT:PSS/Ionic Liquid Hydrogel via Microreactive Inkjet Printing

• DOI: 10.1021/acsami.9b12069
• Publication Date: 2019-09-19T08:05:22Z
• Authors: Mei Ying Teo; Narrendar RaviCha...; Nara Kim; Seyoung Kee; Logan Stuart; Kean C. Aw; Jonathan Stringer
• Keywords: Biocompatibility; Polydimethylsiloxane; Bioelectronics

The gelation of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has gained popularity for its potential applications in three dimensions, while possessing tissue-like mechanical properties, high conductivity, and biocompatibility. However, the fabrication arbitrary structures, especially via inkjet printing, is challenging because inherent gel formation. Here, microreactive printing (MRIJP) utilized to pattern various 2D 3D structures PEDOT:PSS/IL hydrogel by in-air coalescence PEDOT:PSS ionic liquid (IL). By controlling position Marangoni-driven encapsulation, single droplets as small a diameter ≈260 μm are fabricated within ≈600 μs. Notably, this MRIJP-based freeform patterning maintaining identical performance those conventional spin-coating method. Through controlled deposition achieved MRIJP, can be transformed into different without need molding, potentially leading substantial progress next-generation bioelectronics devices.