Solid-contact Ca2+-selective electrodes based on two-dimensional black phosphorus as ion-to-electron transducers

Abstract

A new type of solid-contact polymeric membrane Ca²⁺-selective electrode has been developed by using black phosphorus as the transducing layer for the first time. The ion-to-electron transducing ability of black phosphorus was examined. The proposed electrode exhibits a good Nernstian slope with a detection limit of 4.0 × 10⁻⁷ M.