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 Ca 2+ -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 Â 10 À7 M.

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

“…Recently, a few layer BP film has been used as an ion-to-electron transducer in ISEs. The authors observed that the presence of BP diminished the charge transfer resistance across the ion-selective membrane/BP/solid contact interfaces and led to increased signal stability of Ca 2+ -ISEs . Recently, BP functionalized with ionophore was used to develop flexible sensor array for multiplex detection of Hg 2+ , Cd 2+ , Pb 2+ , and Na + .…”

“…The authors observed that the presence of BP diminished the charge transfer resistance across the ion-selective membrane/BP/solid contact interfaces and led to increased signal stability of Ca 2+ -ISEs. 869 Recently, BP functionalized with ionophore was used to develop flexible sensor array for multiplex detection of Hg 2+ , Cd 2+ , Pb 2+ , and Na + . 870 The resulting device demonstrated high sensitivity to Hg 2+ with LODs estimated at 1 μg/L and short response time, demonstrating excellent mechanical flexibility (strain limits of 1%) and stability (bending 500 times).…”

Emerging functional materials in solid-contact potentiometric sensing, a field full of vitality

“…Liang and coworkers developed a solid-contact polymeric membrane Ca 2+ -selective electrode by exploiting a few layer black phosphorus film as the transducer layer. 40 The black phosphorus layer significantly reduced the membrane's resistance and improved the sensor's long-term potential stability. A good Nernstian slope with a detection limit of 4.0 Â 10 À7 M was obtained.…”