Structural Morphology and Optical Properties of Nanocomposites based Conducting Polymer

Abstract

A simple, inexpensive, pulsed laser deposition (PLD) technique excimer source Nd:YAG laser was used for the preparation of the all films irradiation targets and deposite of nickel oxide NiO, polypyrrole PPy, carboxylic functionalized multi-walled carbon nanotubes (f-MWCNT), [PPy:(f-MWCNT)] nanocomposite, [NiO/PPy:(f-MWCNT)] and [PPy:(f-MWCNT)/NiO] films on fluorine-doped tin oxide (FTO) substrates. Surface morphology of all films and nanocomposite was investigated by Scanning Electron microscopy (SEM) display various morphology on the surface of the all films and nanocomposites, but the predominant structure is granular morphology, x-ray diffraction (XRD) indicates that the peaks of all films are broadening expect for PPy are sharp peaks, the optical absorbance spectra for the studied all films showed the maximum values around (425, 333, 347, and 397) nm refer to type transitions (π*-π) and (polaron-π*) and the maximum value of NiO around 346 nm. The optical energy gap of all films was determined and values around (2.2, 2.6, 2.8, 3, 3.2) eV. It has been observed that the measurements for films [NiO/PPy:(f- MWCNT)] and [PPy:(f-MWCNT)/NiO] may be identical and NiO nanoparticles are a good adhesion to nanocomposite films and interconnected in structure.