Figure 1.

Wearable temperature sensors. (a) Image of a 4 × 4 temperature coefficient of resistance (TCR) sensor array after application to the skin deformed by pinching the skin in a twisting motion (scale bar 8 mm). (b) Temperature of the palm measured with an infrared camera (blue) and a sensor array (red, offset for clarity) during mental and (c) physical stimulus tests. Reprinted with permission from Ref. [42]. Copyright 2016, Nature Publishing Group. (d) Schematic diagram and representative image of the stretchable graphene thermistors at twisted states (scale bar 1 cm). (e) Images of the stretchable graphene thermistor at 0% and 50% strains (scale bar 1 cm). (f) Resistance variation with temperature (30 to 100 °C) within 0% to 50% strains (step 10%). Reprinted with permission from Ref. [31]. Copyright 2015, American Chemical Society.