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Experimental and Theoretical NANOTECHNOLOGY (ETN) is a multidisciplinary peer-reviewed international journal published three issues a year. It includes specialized research papers, short communications, reviews and selected conference papers in special issues on the characterization, synthesis, processing, structure and properties of different principles and applications of NANOTECHNOLOGY; with focus on advantageous achievements and applications for the specialists in engineering, chemistry, physics and materials science.
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Polyaniline (PANI) and PANI/f-MWCNT thin films have been synthesized by the in-situ chemical polymerization method. Ammonium persulfate (NH4)2S2O8 and hydrochloric acid (HCL) were used as an oxidizing agent and protonic acid dopant respectively. The f-MWCNT was added to PANI matrix to enhance and modify its optical properties. The films were deposited on glass substrates by dip coating method and its characterizations were done by UV-Vis (Ultra-Violet Visible Spectrophotometer) and FTIR (Fourier transform Spectroscopy) in the region of (650–2500) cm−1. The optical energy gap and optical constants such as the reflective index, the extinction coefficient and others were carried out from the optical measurements in the wavelength range (300-900) nm. The optical results indicate that the prepared films have allowed direct transition and the optical energy gap depends on the different weight percentages of f-MWCNT which was used as a dopant. FTIR spectrum shows several absorption peaks centred at around 1556, 692, 1235, 830, 1450 and 1280 cm−1 which consider the characteristic band peaks of polyaniline.
Keywords: PANI/f-MWCNT thin films, In-situ polymarization method, Optical properties