Journal of Biotechnology & Biomaterials
Open Access

Abstract

Poly-aniline (PANI) is among the most exploited conducting polymers by the researchers. It has outstanding electrical conductivity, stability and redox properties which facilitate its usage in sensing applications. PANI also offers ease of preparation, uniform film formation and can be easily coated on different substrates like plastic, glass, metal, etc., through chemical or electrochemical routes. A phosphonic acid derivative more commonly known as CYANEX 923; is a useful reagent in the liquid-liquid extraction and separation of various metals. In the present work, phosphonic acid doped poly-aniline films have been grown on plastic substrate as a robust sensing platform. The designed patterns were developed on plastic substrates by masking the remaining area with adhesive tape. The prepared substrates were immersed in aniline solution in which ethanolic solution of phosphonic acid derivative was added. The solution was kept under ice cold conditions under continuous stirring. Next, ammonium persulfate solution was added drop wise in order to initiate polymerization of aniline. The solution was kept overnight and the substrates were washed and dried next day to obtain the desired films. The topological studies of as-grown films were carried out using field emission scanning electron microscope (FE-SEM). The synthesized composite was also characterized using UV-Vis spectroscopy, FTIR, XRD and FE-SEM. The developed sensor can be explored further for the impedometric sensing of heavy metals by measuring change in charge transfer resistance (RCT) of doped film against varying frequency.

Biography

Email: dr.akashdeep@gmail.com