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Figure 1. PEDOT:PSS-based intrinsically soft and stretchable bioelectronics. (A) Chemical structure of PEDOT:PSS, the colloidal particle structure of PEDOT:PSS in water dispersion and the microstructure of a PEDOT:PSS film^[2]. Reprinted with permission. Copyright 2016, Springer Nature. (B) Schematic illustration of PEDOT:PSS/IL composite, where IL serves as a enhancer of stretchability and electrical conductivity^[5]. Reprinted with permission. Copyright 2017, AAAS. (C) Structure of stretchable PEDOT:PSS composite with a topological sliding network^[6]. Reprinted with permission. Copyright 2022, AAAS. (D) Pure PEDOT:PSS hydrogel with a single network^[8]. Reprinted with permission. Copyright 2019, Springer Nature. Three-dimensional printing of PEDOT:PSS into (E) circuit pattern or (F) neural probe (scale bars of 5 and 1 mm, respectively)^[9]. Reprinted with permission. Copyright 2020, Springer Nature. (G) Schematic diagram of PEDOT:PSS/PVA double network hydrogels obtained from a mixed solution to form the PVA network and finally a double network^[11]. Reprinted with permission. Copyright 2022, Wiley-VCH.