Fig. 2.

SiNM-based wearable sensors. a SiNM-based strain gauge array on a polymer-based finger tube mounted on a relaxed (left) and bent thumb (right). b Relative change in the resistance of the SiNM strain gauge according to the bending (black) and side-to-side (red) motion of the thumb. (a, b Reproduced with permission from Ref. [8], © 2012, IOP Science). c SiNM-diode-based wearable temperature sensor located on a heated metal element (left) and the measured temperature distribution (right). d SiNM strain gauge array integrated onto prosthetic skin, which measures the strain distribution when during handshaking. (c, d Reproduced with permission from Ref. [57], © 2013, Nature Publishing Group). e SiNM pressure sensor integrated onto prosthetic skin, which measures the applied pressure when the wearer is typing with a keyboard (top right) and grasping a ball (bottom left), and the corresponding measured change in the resistance of the SiNM pressure sensor (right). f SiNM temperature sensor integrated onto prosthetic skin, which measures the changes in the temperature of hot (top) and cold (bottom) glass cups. (d–f Reproduced with permission from Ref. [7], © 2014, Nature Publishing Group)