Effect of Influencing Factors in the Sonochemical Synthesis of Gamma Iron Oxide and its Gas Sensing Property

Nano γ-Fe 2 O 3 was easily synthesized by sonochemical route with the variation of the influencing factors like sonication time and purging of N 2 gas. The synthesized powders were characterized by X-ray diffraction (XRD), transmission electron micrograph (TEM), selected area electron diffraction (SAED) and scanning electron microscope (SEM). The synthesized powder was coated over an electroded alumina tube followed by sensor fabrication and the response of the fabricated sensors towards acetone and alcohol were measured. High sensitivity of γ-Fe 2 O 3 based sensor towards sub PPM of acetone was observed for which γ-Fe 2 O 3 can be claimed as a possible material for the non invasively detection of diabetics.