Parylene C based bioelectronics for implantable applications. A. Laser cut Parylene C substrates for kirigami enabled stretchable multielectrode arrays for electrophysiological monitoring (i, ii, iii, iv), capable of high-resolution electrocardiography (v, vi). Reproduced with permission.[135] Copyright 2018, John Wiley and Sons. B. 265 PEDOT:PSS electrode array on 2 μm Parylene C to record neural activity from human epileptic patients. Reproduced with permission.[220] Copyright 2015, Springer Nature. C. Flexible blue organic light emitting diode (OLED) on Parylene C substrates (i) for optogenetic muscular stimulation (ii) and electromyogram recording (iii, iv). Reproduced with permission.[248] Copyright 2020, National Academy of Sciences.