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. 2022 Jul 6;8(27):eabo7049. doi: 10.1126/sciadv.abo7049

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Fig. 3. — (A) Schematic illustrations of the DC part of ISM-functionalized sensors and the interaction between ISM and ions at the solution-sensor interface. (B) Photograph of a pair of thin-film electrodes as SE and RE for potentiometric sensing. (C) OCP (versus a Ag/AgCl RE) of a K⁺-functionalized Au electrode in response to varying concentration of K⁺. (D) Normalized values of measured S₁₁ of a wireless K⁺ sensor. (E to H) Calibration plots for K⁺, Ca²⁺, Na⁺, and H⁺ wireless sensors in response to corresponding analytes.