Background: In recent times, biosyntheses of metal nanoparticles were used for several life rescue applications. In this study,
Dillenia indica leaf aqueous extract was utilized for the synthesis of gold nanoparticles.
Objective: To test anti-microbial properties of biologically fabricated gold nanoparticles.
Methods: Gold nanoparticles were efficiently prepared by making use of aqueous leaf extract of Dillenia indica. The excitation
of formed AuNPs was confirmed using UV–Vis spectrophotometer. In particular, absorption spectra of AuNPs exhibited a
well-defined SPR band centered at around 530 nm.
Results: The high-resolution Scanning Electron Microscope (SEM) results of the obtained AuNPs confirmed the formation
of particles with a size range of 5–50 nm. The ultra-high resolution TEM (UHRTEM) images displayed clear lattice fringes on
the particle surfaces. Single crystalline nature of the biosynthesized AuNPs was represented by means of selected-area electron
diffraction pattern.
Conclusion: The antibacterial activity of AuNPs revealed significant activity towards both gram negative and gram positive
bacteria signifying their potential disinfection related applications in medicine and biology.
DOI: https://dx.doi.org/10.4314/ahs.v19i1.17
Cite as: Huang Q, Luo A, Jiang L, Zhou Y, Yang Y, Liu Q, et al. Disinfection efficacy of green synthesized gold nanoparticles for medical disinfection applications. Afri Health Sci. 2019;19(1). 1441-1458. https://dx.doi. org/10.4314/ahs.v19i1.17 
