Soft surfactant-assisted uniformly dispersed platinum nanoparticles for high performance electrochemical non-enzymatic glucose sensing platform

In this study, highly catalytic platinum nanoparticles (PtNPs) were synthesized on polished Au thin-film electrode using surfactant assisted electrochemical technique (SAET) for a high-performance non-enzymatic glucose sensor. Residual surfactants on the fabricated electrodes were removed by dipping into a tetrahydrofuran (THF) solution. The physical characteristics of the electrodes were investigated through FESEM, XRD, and EDX, and the analytical analyses were demonstrated with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and amperometry. After optimization considering the NP deposition potential and time, dipping time in THF, the fabricated biosensor showed a promising electro-oxidation towards glucose in terms of high sensitivity of 5.87 +/- 0.13 mu AmM-1 cm(-2), detection limit of 0.235 mu M, wide linear range from 0.25-36 mM, fast response lower than 5 s, and good reproducibility and stability. The proposed SAET can be applied to uniform deposition and dispersion of other nanoparticles for numerous applications. Therefore, the proposed sensing platform can be useful to monitor glucose in diagnostic bioprocess monitoring and environmental monitoring.