Pd Doped SnO2 Resistive Film As A Non-Enzymatic Glucose Sensor

Abstract

A new sugar sensor based on metal oxide is presented here. The variation on the sensor resistance is studied against different glucose and fructose concentrations (1 - 360 mg/dl). The study is done for three different resistive films (i) pristine palladium oxide (PdO_x); (ii) tin oxide (SnO₂) and (iii) palladium doped tin oxide (Pd-SnO₂). The chemical reactions of glucose and fructose with surface species were studied . Pd-SnO₂ films show excellent and reliable response to glucose and fructose solution in comparison with the bare films (PdO_x and SnO₂). Sensor performance was checked for blood of normal (120 mg/d) and diabetic (420 mg/d) patient. The sensor showed remarkable response of ~2 and 12 for normal and diabetic patient respectively. The non-enzymatic sensor showed a good stability, repeatability and reproducibility. The structure and morphology of these films were characterized by X-ray diffractometer, Transmission Electron Microscopy (TEM).