Abstract
In the present work, undoped and In-doped zinc oxide (ZnO) nanoparticles
have been prepared by sol gel technique. The structural and
morphological properties of the obtained nanoparticles have been studied
using respectively X-ray diffraction (XRD), Raman spectroscopy and
scanning electron microscopy (SEM). The electronic defects in the
nanopowder band gap were investigated by photoluminescence (PL)
spectroscopy. The antibacterial activities of the prepared nanopowders
have been tested against Gram positive and Gram negative bacteria’s.
Based on the inhibition zone determination. The In doping effect is
explained in term of the electronic defect enhancement such as inertial
defect Zni and vacancy defect Vzn with In doping, these two defects act
as source of electrons and holes during the reactive oxygen species
(ROS) production responsible for bacteria’s destruction. Due to the
bonded hydrogen charge transfer crystal screening, the prepared ZnO
nanoparticles exhibit a low antioxidant activity