Fig. 2: Biodegradable, restorative and self-morphing neural interface.

a Image of the biodegradable and restorative neural interface: front view (left) and side view (right). b Neural interface in the temporarily flattened state in air at room temperature (left) and in the permanent rolled-up state after immersion in the PBS (pH 7.4, 37 °C) solution (right). c, DSC analysis of the biodegradable shape memory polymer layer. d Representative electrochemical impedance spectra of the biodegradable Mo/Si recording electrode. e Electrochemical impedance at 1 kHz of the biodegradable Mo/Si recording electrode before and after immersion in PBS over 7 weeks, data are presented as mean ± s.d., n = 3 samples in each group. f Images collected at various stages of accelerated dissolution of Bio-Restor in PBS (pH 7.4, 60 °C). g Biodegradable Mo/Si electrode array implanted on the intact sciatic nerve. h Recorded signal traces using the Mo/Si electrode array on sciatic nerves during the flexion-extension movement of the hindlimb. The box plot presents the median (center line), lower quartile (lower border), upper quartile (upper border), maximum (upper whisker), and minimum (lower whisker), which are ≤ 1.5 times the interquartile range.