International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 02 Issue: 09 | Dec-2015 www.irjet.net p-ISSN: 2395-0072 © 2015, IRJET ISO 9001:2008 Certified Journal Page 2427 Synthesis and Characterization of Polyaniline Doped Metal Oxide Nanocomposites Megha Sawarkar 1 , S A Pande 2 ,P S Agrawal 3 1. Research Scholar, Dept of Applied Chemistry, Laxminarayan Institute of Technology, Nagpur-440 033, India 2. Associate Prof., Dept of Applied Physics, Laxminarayan Institute of Technology, Nagpur-440 033, India 3. Associate Prof. ,Dept of Applied Chemistry, Laxminarayan Institute of Technology, Nagpur-440 033, India ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - The ZnO-Pani and CdO-Pani nanocomposites were prepared by sol-gel method using their respective nitrates. It is a simple and low cost method to prepare nanocomposite. The prepared samples were characterized by using Scanning Electron Microscope (SEM), X-ray diffraction (XRD) and Fourier Transform Spectroscopy (FTIR) to get surface morphology, idea of getting particles of nanosized range so that further characterization can be done, to study the electrical properties of synthesized nanocomposite and measure the resistivity. Key words: Metal Oxide nanoparticles, polyaniline, structural properties. 1. Introduction Mutual interactions between inorganic semiconductors and conducting polymers may give rise to interesting properties which are significantly different from those of individual components [1]. Nanostructures and nanocomposites of conducting polymers have emerged as a new field dedicated to the creation of smart materials for use in future technologies [2-3]. Blending or encapsulation of inorganic nanoparticles in Intrinsically conducting polymer matrix is believed to be an easy route to prepare and design nanocomposites where delocalized -electrons can interact with inorganic nanoparticles, resulting in materials of unique or better properties [4]. Many studies on preparation of polymer nanocomposite have been reported in the quest to develop new advanced materials with improved mechanical, electrical, optical and catalytic properties or to improve conduction mechanism in electronic devices. These materials have found their use in many electronic and nanoelctronic devices. Polyaniline (PANI) is a promising conducting polymer due to its easy synthesis, environmental stability and high electrical conductivity on doping with protonic acids [5-6]. The highly ordered structures such as crystalline or self assembled structures of ideal conducting polymer - like electrical conductivity .To induce an ordered structure, other materials acting as filler for the composite are required [7-12]. The preparation of PANI composites with various materials has received great attention because of their unique properties and applications in various electrical and electronic devices. Several reports dealing with the preparation of conducting composites such as Fe3O4:PANI, MnO2:PANI, TiO2:PANI and ZrO2:PANI [13,14], as well as preparation and characterization of ZnO:PANI composites have been published [15-17] . Due to these properties it has been studied extensively for making optical and electronic devices [18- 20] like: light emitting diodes, solar cells, transducers, photo detectors, etc. In particular, ZnO nanostructures (NSs) are of intense interest since they can be grown by a variety of methods with different morphologies. Nanostructure ZnO can be synthesized by various methods such as physical, chemical, electrochemical, etc. but chemical route has attracted much attention due to the flexibility of controlling the shape and size of the structures by tuning the different growth conditions. [21- 26] To utilize theses properties of ZnO in LEDs application, another p-type material is necessary as ZnO NRs is unintentionally n-type material. Since mostly polymers are p-type and their special properties like low cost, low power consumption, flexible and easy manufacturing all makes polymers a better choice to use with ZnO NPs to fabricate a flexible device that utilizes the properties of both materials for large area lighting and display application. [27, 28] On the other hand Cadmium oxide (CdO) is n-type semiconductor used as a transparent conductive material prepared as a transparent conducting film back. Cadmium oxide has been used in applications such as photodiodes,