SU-8 epoxy substrates for flexible neural interfaces. A. A neural probe photopatterned with microfluidic channels for simultaneous drug delivery and electrophysiology (i, iv), demonstrated through increased neural activity on the delivery of potassium ions(iv).Reproduced with permission.[203] Copyright 2012, Elsevier. B. Photopatterned syringe-injectable mesh electronics (i, ii) deployed in murine brains that promote biointegration (ii), reduce glial scarring (v), and can record field potentials (iii) and single neuronal activity (vi). Reproduced with permission.[214] Copyright 2017, National Academy of Sciences. Reproduced with permission.[215] Copyright 2016, Springer Nature.