Electrochemical current-voltage and capacitance-voltage measurements of boron-doped single-crystal diamond in a wide range of electrolytes

Presents the results of a systematic study of the electrochemical response of unmodified single-crystal boron-doped diamond plates. The study was conducted in a wide range of aqueous electrolytes with various pH values (from 0.85 to 13.59), including a biocompatible medium – phosphate-buffered saline. The current-voltage, capacitance-voltage characteristics, and dissipation factor were measured in all electrolytes used. The stability of the electrochemical response of unmodified boron-doped diamond and the presence of a wide potential electrochemical window were demonstrated. The influence of the test signal frequency on the measured capacitance-voltage characteristics and the calculated concentration of free charge carriers were demonstrated. The obtained results confirm the prospects of single-crystal boron-doped diamond as a basic platform for creating stable electrochemical biosensors.

Authors: L. I. Ivkin, G. E. Yakovlev, A. V. Solomnikova, V. I. Zubkov

Direction: Physics

Keywords: boron-doped diamond, electrochemistry, current-voltage characteristics, capacitance-voltage characteristics, biosensor

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