Effect of Poly Ethylene Glycol on Moisture Sensing of Copper Ferrite Nanocomposite

Richa Srivastava^1,

¹Department of Physics, University of Lucknow, Lucknow, India

Cite this paper:
Richa Srivastava. Effect of Poly Ethylene Glycol on Moisture Sensing of Copper Ferrite Nanocomposite. American Journal of Sensor Technology. 2015; 3(1):1-4. doi: 10.12691/ajst-3-1-1

Abstract

Present paper reports, synthesis of CuFe₂O₄ nanocomposite via chemical precipitation route and effect of poly ethylene glycol on their humidity sensing properties. The variations of resistance with and without PEG at different value of %RH of the sensing elements were investigated. The maximum average value of sensitivity was found 13.7 MΩ/%RH respectively over the entire range of relative humidity. Results are found to be reproducible after three months with ±5 % hysteresis. Sensing material synthesized through PEG has been characterized by X-ray diffraction (XRD) and Scanning electron microscopy (SEM). XRD pattern revealed cubic crystal system. The average crystallite size of material was found to be 85.7 nm. SEM images show porous nature of sensing material with a number of active sites throughout the surface. The average size of pores of material was found to be 2µm.

Keywords:
humidity sensors sensitivity morphology composite materials

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