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Fig. 2 | Nanoscale Research Letters

Fig. 2

From: A Portable Triboelectric Nanogenerator for Real-Time Respiration Monitoring

Fig. 2

Working mechanism diagram of the respiration sensor and its four working processes. a “Intimate contact” process: user inhales and the surfaces of the tribo-pair fully overlap. b “Outward sliding” process: user exhales and the tribo-pair slides outward. c “Short pause” process: user exhales and the tribo-pair slides outward to the maximum extent. d “Inward sliding” process: user inhales and the tribo-pair slides inward

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