Green Synthesis, Characterization, and Acoustical Analysis of Copper Quantum Dots (Cu QDs) Using Leaf Extract of Mangifera indica Plant

Abstract

The copper quantum dots (Cu QDs) are successfully green synthesized from copper sulfate (CuSO[Formula: see text] as precursor material using plant leaf extracts of Mangifera indica. The mangiferin as a natural glucosylxanthone present in leaf extract of M. indica acquires antioxidant, antimicrobial, antidiabetic, antiallergic, anticancer, hypocholesterolemic, and immunomodulatory activity, which acts as an effective stabilizing and reducing agent for conversion of the copper ion (Cu[Formula: see text] into the Cu QDs in aqueous medium. The green synthesized Cu QDs are characterized using ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, fluorescence spectroscopy, dynamic light scattering instrumental techniques, which confirm the successful synthesis and photoluminescence (PL) behavior of the Cu QDs. The ultrasonic investigation was carried out to find out the variation of ultrasonic velocity and density with concentration of Cu QDs in aqueous leaf extracts of M. indica plant as well as to calculate the dependency of acoustical parameter, namely adiabatic compressibility, acoustic impedance, and intermolecular free length on concentrations. The synthesized Cu QDs are biocompatible that can be a potential candidate for various in vivo and in vitro applications such as antioxidant, antimicrobial, anticancer, biosensor, bioimaging, and biocatalysis fields.