High sensitive polyaniline nanosheets (PANINS) @rGO as non-enzymatic glucose sensor

Abstract

This study aims the amperometric enzyme-free glucose sensing of interlayered Polyaniline nanosheets @reduced grapheme oxide (PANINS@rGO). Conductive PANINS were synthesized using in situ chemical oxidative polymerization method. The PANINS@rGO nanocomposite was prepared by the solution mixing method and as-synthesized material was fully examined using various spectroscopy and microscopy techniques. PANINS@rGO composite coated on screen-printed carbon electrode (SPCE) was studied for electrochemical behaviour for the detection of non-enzymatic glucose. The fabricated sensor matrix was tested towards detection of glucose efficacy using cyclic voltammetry (CV) and Chronoamperometry (CA) techniques in the presence of 0.1 M NaOH electrolyte in a range of 1–10 mM at an optimum working potential of 60 mV s−1. PANINS@rGO/SPCE absorbed with high sensitivity (3448.27 μA mM−1 cm−2) and excellent low detection limit (LOD) 30 nM, (S/N = 3). Furthermore, the obtained results of the proposed PANINS@rGO/SPCE fabricated a finite sensor for non-enzymatic glucose sensor. Thus this report proves the practical opportunities for the development of environmentally benign, cost effective and chemically stable electrode materials for sensors, which may be beneficial for the expansion of economically viable enzyme free electrochemical glucose sensor devices.