SYNTHESIS, CHARACTERIZATION AND TOXICITY OF BIOCONJUGATED CdS QUANTUM DOTS

Abstract

Thiol stabilised CdS quantum dots were prepared by arrested precipitation method. The method is simple, reproducible and developed at room temperature. The quantum dots thus produced were stable for months. The resultant CdS quantum dots were functionalised with lactoferrin by means of coupling chemistry. These quantum dots were characterized by UV—VIS, fluorescence spectroscopy; Fourier transformed infrared spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM) and atomic force microscopy (AFM). The effect of toxicity of quantum dots on E. coli was done and both CdS quantum dots and lactoferrin functionalised quantum dots resulted in inhibition of growth of E.coli.