Fig. 6: Hybrid 3D printing and printed SA-II AAN.
From: Hybrid 3D printing of bio-inspired artificial slowly adapting type II afferents

Schematic images of hybrid 3D printing procedures: (a) multi-material printing of heterogeneous substrate, (b) traces including conductive interconnection and the NPC, and (c) pick and place of surface mount electrical elements. Digital images of a hybrid printed SA-II AAN system that is (d) stretchable, (e) bendable, and (f) twistable. g Images comparing a stretched and unstretched hybrid SA-II AAN system. h Output voltage curves from printed AAN at 20% and 50% strain. i Frequency variation of output voltage from AAN system and conductivity variation from artificial mechanoreceptor. j Operational photographs of soft pneumatic actuator with an integrated SA-II AAN system when the pressure P = 0 and P > 0. k Output voltage curve and frequency variation of the output voltage during soft pneumatic actuator deflation (i) and inflation (ii). Scale bars, 15 mm.