ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

AC electrical properties of transition metal dichalcogenide based polypyrrole composites

Anegundi Sunilkumar, Shidiginamola Manjunatha, Yaled Thippeswamy Ravikiran, Sabu Thomas, and Teluguru Machappa

Department of Physics, VTURC, Ballari Institute of Technology and Management, Ballari, India

E-mail: ytrcta@gmail.com

Received: 26 December 2022  Accepted: 11 April 2023

Abstract:

Tantalum disulphide (TaS₂) embedded polypyrrole (PPy) composites in varied compositions have been prepared by the chemical polymerization technique. PPy and PPy/TaS₂ composites were subjected to scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and selected area electron diffraction (SAED) to understand their morphology. X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR) studies were carried out to account for their structural properties. Room temperature AC conductivity of these composites has been studied in the frequency range between 50 Hz to 5 Mhz. AC conductivity of the composites showed increasing trend with increasing wt% of TaS₂- which can be explained on the basis of hopping of polarons. Conductivity of PPy/TaS₂-50 wt% composite has shown conductivity of 4.6 × 10^–3 Scm⁻¹ at 100 Hz as compared to those of other composites. Dielectric response of these composites has been explained using Maxwell–Wagner polarization, and the tangent loss curves have been understood based on the Rezlescu model. These composites can be considered in the design of low and mid frequency devices.

Keywords: Polypyrrole; Tantalum disulphide; Composite; AC conductivity; Dielectric behaviour

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02828-x

Chemical Papers 77 (9) 4913–4921 (2023)