Fig. 2: Graphic illustration of PEDOT: PSS-based conductive materials.
From: PEDOT:PSS-based bioelectronics for brain monitoring and modulation
a Schematic illustration of PEDOT:PSS. Left: molecular structure; Right: PEDOT:PSS in aqueous phase. b Schematic illustration of PEDOT:PSS with different additives in aqueous phase. Second dopants facilitate the PSS chain separation from the PEDOT:PSS complex (blue arrow) by charge screening effect. The phase separation enables PEDOT chain arrangement and the formation of π stacking (yellow dashed line), which improves the electrical transduction (yellow star). Viscoelastic polymers form hydrogen bond with PSS chain (blue dashed line), making the complex system more viscous and stretchable. Conductive fillers enhance the charge transport (white dashed line). Simultaneously, the fillers promote PSS removal (blue arrow) and PEDOT chain arrangement (yellow dashed line), all of which enhance the conductivity (yellow star). Crosslinkers form a long interconnected network with PEDOT:PSS systems by hydrogen bond with PSS (blue dashed line)
