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. 2022 Dec 2;10:1070855. doi: 10.3389/fbioe.2022.1070855

FIGURE 1.

FIGURE 1

(A) Schematic illustration of humidity sensor fabricated and respiratory rate monitoring. SEM images of bulk MoS2 without (B) and with (C) liquid-phase ultrasonic exfoliation, (D) PVP-assisted liquid-phase ultrasonic exfoliation of MoS2 (the upper right corner is the photograph of MoS2/PVP ink), (E) Copper interdigital electrode array on flexible LCP substrate, (F) Humidity sensor is very small (4 mm × 6 mm), (G) Bent interdigitated electrode on flexible LCP substrate.