Figure 4 | Scientific Reports

Figure 4

From: Fluorographene based Ultrasensitive Ammonia Sensor

Figure 4

(A) Nyquist plots of FG coated electrode on SPE sensor for varying ammonium ion (NH4+) concentrations (i. blank, ii. 1 pM, iii. 10 pM, iv. 100 pM, v. 1 nM, vi. 10 nM, and vii. 0.1 μM), (inset) the photograph of an FG coated SPE sensor, (B) normalized charge transfer resistance for various ammonium ion concentrations, (C) Nyquist plots showing increased impedance with increase in direct NH3 exposing time, (D) Rct values with varying direct NH3 exposures.

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