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. 2022 Dec 1;13:7405. doi: 10.1038/s41467-022-35074-y

Fig. 1. Design and sensing mechanism of the ingestible self-powered BFC capsule sensor.

Fig. 1

a Schematics of the capsule sensor operating in a porcine model. b Schematic layout of the capsule sensor. c Illustration of the chemical composition and reaction mechanisms inside the BFC sensor. d Signal conversion mechanism converting glucose concentrations to voltage, then to mHBC modulation signal frequency, transmitted wirelessly to an external receiver. e Dimensions of the capsule (length: 2.6 cm, diameter: 0.9 cm) and of the internal BFC electrodes (sensing length: 0.40 cm, diameter: 0.35 cm). f Picture of the actual device. Scale bar, 1 cm. g Example of measured data from in situ experiments in a porcine model upon oral glucose intake.