Extended Data Fig. 7: Surface characterizations of superhydrophilic and superhydrophobic surfaces. | Nature Sensors

Extended Data Fig. 7: Surface characterizations of superhydrophilic and superhydrophobic surfaces.

From: Wearable lateral flow assays for cortisol monitoring with time-dynamic sweat sampling and sensing by electrochromic timers

Extended Data Fig. 7: Surface characterizations of superhydrophilic and superhydrophobic surfaces.The alternative text for this image may have been generated using AI.

a, Contact angle measurements for a PET film. b, Contact angle measurements for a superhydrophilic PET film. c, Atomic force microscopic (AFM) image of a PET film. Scale bar 1 μm. d, AFM image of a superhydrophilic PET surface formed by a coating of silica nanoparticles. Scale bar 1 μm. e, The effect of reactive ion etching power on the contact angle of a superhydrophobic PET + PSA substrate. n = 3.

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