Development of Au@NiO decorated polypyrrole composite for non-Enzymatic electrochemical sensing of cholesterol.

[Display omitted] In this study, glassy carbon electrode modified by Au@NiO decorated polypyrrole nanocomposite (Au@NiO/PPy-GCE) was fabricated for sensing of cholesterol by non-enzymatic electrochemical method. The composite was characterized by XRD, XPS and morphological studies were examined using FE-SEM and TEM. The redox properties of cholesterol were investigated by cyclic voltammetry. When differential pulse voltammetry was employed to sense cholesterol, it exhibited a linear range from 1.0 × 10^-5 to 1.0 × 10^-4 M, with the sensitivity 7.6 µA µM⁻¹ cm⁻² and detection limit 5.8 x10^-7 M. Hence, this composite has excellent practical applications towards the fabrication of commercial sensors. [ABSTRACT FROM AUTHOR]