Fig. 6: Selectivity performance of the Pb2+ ion photonic sensor against. | Nature Communications

Fig. 6: Selectivity performance of the Pb2+ ion photonic sensor against.

From: Crown ether decorated silicon photonics for safeguarding against lead poisoning

Fig. 6

a Cd2+, and b, K+ at reference concentrations of 15 ppb in DI water where no shifts in the interferometric spectra indicative of ion binding is observed. c The detection performance of the Pb2+ photonic ion sensor is evaluated at reference Pb2+ concentrations of 15 ppb in DI water. The pH of the analyte is maintained at 6.8 (see Methods).

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