Title
Highly stable CdS quantum dots embedded in glasses and its application for inhibition of bacterial colonies
Author
S. R. Munishwar, P. P. Pawar, S. Y. Janbandhu, R. S. Gedam
Year
2020
Journal
Optical Materials
Abstract
An inhibition of pathogenic bacteria using light source is an attractive phenomenon. The present study is based on the application of CdS quantum dots (QDs) grown in the glass matrix for growth inhibition of bacteria. Glass system 36SiO2–15B2O3–15Na2O–9K2O–25ZnO with 3 wt % CdS was prepared by the melt-quench technique. CdS QDs were grown in glass matrix with single-step heat treatment and characterized by XRD, HRTEM, XPS, and micro-Raman for phase identification. Their size related to quantum confinement properties were studied with optical absorption (UV–Vis), photoluminescence (PL) spectroscopy. The structural and optical studies confirm the growth of CdS QDs in a glass matrix which was then utilized for antimicrobial activity. The generation and recombination of electron-hole pairs by CdS QDs due to absorption of light were responsible for the formation of reactive oxygen species (ROS). The use of these ROS in bacterial colonies inhibition has been discussed.
Instrument
V-670, FP-8200
Keywords
Absorption, Band gap, Fluorescence, Photoluminescence, Optical properties, Materials