Int.J.Curr.Microbiol.App.Sci (2014) 3(7) 512-517 512 Original Research Article Synthesis and optical studies of pure polyaniline film Susheel Kumar Singh, Arvind Kumar Verma, and R. K. Shukla* Department of Physics, University of Lucknow, Lucknow-226007, India *Corresponding author ABSTRACT Introduction In the few past decades inherently conducting polymer (ICP), polyaniline (PANI) has been paid considerable attention because of its high electrical conductivity (LiW and Wan M, 1998), thermal stability (Jing X et al., 1995), ease of preparation, and good environmental stability (Genies E et al., 1990). This polymer was found to be the most promising candidate for technological applications (Pouget J et al., 1991; Mac Diarmid A and Epstein A, 1994) especially in light-weight batteries and sensors (Ogura K et al., 1997; Kulkarni M and Viswanath A, 2005). Polyaniline (PANI) is a very well-known conducting polymer which has attracted a lot of attention due to its promising applications (Kang E Tet al., 1998) in anticorrosion coatings (Wessling B, 1994; Lu W K et al., 1995), electrodes in secondary batteries (MacDiarmid A G et al., 1987), active components in LEDs etc (Wang H L et al., 1996; Chen S A et al., 1996). The ease of synthesis, reasonably high electrical conductivity and good environmental stability make it a potential candidate for use in organic electronic devices (Neoh et al., 1990). Indeed, PANI is a dynamic block ISSN: 2319-7706 Volume 3 Number 7 (2014) pp. 512-517 http://www.ijcmas.com Keywords XRD, SEM, FTIR, UV-visible, PL, polyaniline film Inherently conducting polymer, polyaniline (PANI) has been synthesized by a chemical oxidative polymerization method. Ammonium peroxydisulphate was used as an oxidizing agent dissolved in aqueous media. The polyaniline film was prepared by dip coating method and its characterizations were done by XRD (X-ray diffraction), SEM (scanning electron microscopy), UV-Vis (ultra-violet visible spectrophotometer), PL (Photoluminescence spectrophotometer) and FT- IR(Fourier transform Spectroscopy). From the SEM image of PANI film, it has been observed that interfacial polymerization offers the agglomeration of grains having spherical morphology and its particles size were found to be 300 nm. FTIR study shows several absorption peaks centred at around 920 cm -1 , 1220 cm -1 , 1487 cm -1 and 1594 cm -1 . Photoluminescence spectrum exhibits mainly two emission peaks cantered ~381 nm and 391 nm.