An attempt to prepare an easy-fabricated porous silicon-based electrochemical non-enzymatic sensor for glucose detection

Abstract

In this paper, we have prepared porous silicon non-enzymatic sensor (Ag/Ps/Si/Ag), using p-type silicon wafer cut into homogeneous pieces, the galvanostatic electrochemical etching process was carried out at different etching duration and constant current density. Optical measurements such as UV spectroscopy and Photoluminescence were performed to calculate the energy gap value and notice the effect of etching time on the porous layer. The morphological structure was obtained by scanning electron microscope and the porosity was calculated by the gravimetric method, then different glucose concentrations (0.1, 1, 10, 100 mg/mL) were exposed to the surface after coating the lower surface with silver and the upper surface with a small circular batch by the thermal evaporation method. The I-V characteristics show that the current density is affected by glucose concentration, thus it can be modified to be an easy fabricated, cheap biosensor for glucose concentration detection.