Passivation of black phosphorus as organic-phase enzyme platform for bisphenol A determination

Anal Chim Acta. 2020 Jan 25:1095:197-203. doi: 10.1016/j.aca.2019.10.030. Epub 2019 Oct 23.

Abstract

Black phosphorus (BP) has a high charge-carrier mobility (∼1000 cm2 V-1 s-1), but the bare BP degrades rapidly in the presence of oxygen and water which limits the application of the BP. In this study, a simple, non-covalent passivation strategy is developed by modifying of the BP with hexamethylendiamine (HA). The functionalized BP exhibits good stability over 4 weeks. The organic phase interdigital electrode which is constructed by stable HA/BP and tyrosinase displays lowest noise signal (0.025 nA) and relatively low detection limit (10 nmol L-1) for bisphenol A. This work provides a new strategy for construction of novel biofuel cell, bioelectronics and biosensors.

Keywords: Black phosphorus; Interdigital electrode; Organic phase biosensor; Passivation; Tyrosinase.

MeSH terms

  • Benzhydryl Compounds / analysis*
  • Benzhydryl Compounds / chemistry
  • Benzoquinones / chemistry
  • Biosensing Techniques / methods*
  • Diamines / chemistry
  • Electrochemical Techniques / instrumentation
  • Electrochemical Techniques / methods
  • Electrodes
  • Endocrine Disruptors / analysis*
  • Endocrine Disruptors / chemistry
  • Enzymes, Immobilized / chemistry
  • Limit of Detection
  • Monophenol Monooxygenase / chemistry*
  • Phenols / analysis*
  • Phenols / chemistry
  • Phosphorus / chemistry*
  • Reproducibility of Results

Substances

  • Benzhydryl Compounds
  • Benzoquinones
  • Diamines
  • Endocrine Disruptors
  • Enzymes, Immobilized
  • Phenols
  • 2,5-di-tert-butylbenzoquinone
  • Phosphorus
  • Monophenol Monooxygenase
  • bisphenol A
  • 1,6-diaminohexane