Figure 4.

Trigger and release behaviors of electro‐responsive printed silk carbon nanocomposites. a) Schematic representation of drug delivery concept. b) Chronoamperometry measurements using printed silk carbon nanocomposite. c) SEM image after voltage pulse application. d) Total methylene blue release from silk films with and without carbon nanoparticle content in response to an aggressive voltage stimulation (0.5 V for 5s). e) Cumulative release profile of the methylene blue in response to voltage stimulation, error bars represent standard deviation from the mean (n = 6). The profile reaches a plateau at 250 mV. f) Average release profile (n = 4) over 6 days without applying any voltage measured for different numbers of printed layers (1–3).