Fig. 5 | Microsystems & Nanoengineering

Fig. 5

From: Dual-signal readout paper-based wearable biosensor with a 3D origami structure for multiplexed analyte detection in sweat

Fig. 5

Diagram of the structure of the paper-based microfluidic noninvasive sweat sensor. a Diagram of the overall structure of the sweat sensor. b Overall solid view of the sweat sensor. c–e Contact angle tests of the hydrophobic and hydrophilic regions of the paper in the foldable sweat sensor. f–h SEM diagrams of cotton threads with different degrees of hydrophobicity (f: passes completely; g: passes for a certain time; h: cannot pass)

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