Figure 2.

(a) Schematic illustration of the pressure sensor with a monocrystalline silicon membrane encapsulation; (b) schematic illustration of the cross section. During dissolution process of Si membrane, the neutral plane of the device underwent a displacement; (c) in vivo intracranial pressure recording when compressing and releasing the flank of the rats. The data was collected by both biodegradable sensor and commercial sensor; (d) the baseline (orange) and sensitivity (blue) remained largely unchanged through flank squeezing process on day 0, 7, 14, 21 after surgery. Reproduced with permission from [86].