A Co-operative Synthesis Approach to Prepare Tin Oxide Thin Films by Thermal Evaporation, Muffle Furnace Technique and Its Glucose Sensing Applications

Tin Oxide/Dioxide material plays an important role in many applications such as solar cell, sensors, optical devices and electronic devices. Tin oxide/dioxide films were thermally grown on glass substrates by the thermal method of pure metallic tin powder on glass substrates with 100nm thickness at 300oC substrate temperature for glucose sensing. An aluminium electrode was used as the contact on top of the thin films. It was used to detect the various glucose concentrations (50,100,150,200, 250 & 300) mg/dL at room temperature. The films were annealed at different temperatures and investigated for oxidation, physical and structural properties. The surface properties were studied by scanning electron microscopy and atomic force microscopy. Different elements of oxide films were recorded by energy dispersive X-ray (EDAX). For structural analysis, X-ray diffraction measurements were carried out and electrochemical workstation was used to analyse the glucose (C6H12O6) sensing. It was found to be the SnO2 film at 500oC temperature shows a better response than the other films and this was obtained as a biomedical sensor.