Fig. 3

Origami hierarchical sensor array (OHSA) for the discrimination of multiple chemical and physical stimuli. Color maps represent the responses of two-sided and one-sided OHSA to a, e temperature (~25–50 °C), b, f relative humidity (10–80%), c, g light (6.5–310 mW cm−2), and d, h VOCs (10 ppm), respectively. Two-dimensional canonical score plots of two-sided i and one-sided j OHSA’s responses to the multiple stimuli as indicated