Synthesis, characterisation, and antimicrobial activity of ZnO‐based nanocomposites

Abstract

In this study, ZnO-based nanocomposites including ZnO/CuO (S 1), ZnO/MnO (S 2), and ZnO/MnO/CuO (S 3), were synthesised. S 1 , S 2 , and S 3 were characterised through Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) techniques. Also, the antimicrobial property of the samples was examined against both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli through the colony forming count method. FTIR analysis confirmed the presence of Zn-O, Mn-O, and Cu-O in the samples. The crystalline structure of the sample was analysed by XRD. The surface morphology of the prepared compounds was studied with SEM images. EDS technique was employed for ensuring the presence of Zn, Mn, and Cu elements in the samples. The results clearly showed S 1 , S 2 , and S 3 had high-antimicrobial activity especially for S 3 .

Towards an antibacterial self‐healing coating based on linseed oil/ZnO nanoparticles repair agent, encapsulated in polyurea formaldehyde microcapsules

“…Zinc oxide nanoparticles have shown good antibacterial properties, and the proposed mechanisms for the antibacterial effect of zinc oxide in various environments are different. However, the mechanisms known so far include the formation of ROS [18,19], the liberation of antimicrobial Zn 2+ ions [20], and the direct contact of zinc oxide nanoparticles with the bacterial cell wall, which leads to the demise of microorganisms [21]. As postulated, two major anti-bacterial mechanisms are proposed for ZnO nanoparticles: direct contact with the cell wall and the so-called "non-contact" mechanisms.…”

One-drop chemosensing of dapoxetine hydrochloride using opto-analysis by multi-channel μPAD decorated silver nanoparticles: introducing a paper-based microfluidic portable device/sensor toward naked-eye pharmaceutical analysis by lab-on-paper technology

“…24 Anisotropic NPs can also be employed for the colorimetric detection of numerous analytes since their transformation ability. 27–33 The presence of three distinct sharp vertices in triangular silver nanoprisms (AgNPrs) renders these metallic nanoparticles inherently unstable as a consequence of their elevated surface energy influenced by the Gibbs–Thomson effect. 34…”

“…24 Anisotropic NPs can also be employed for the colorimetric detection of numerous analytes since their transformation ability. [27][28][29][30][31][32][33] The presence of three distinct sharp vertices in triangular silver nanoprisms (AgNPrs) renders these metallic nanoparticles inherently unstable as a consequence of their elevated surface energy inuenced by the Gibbs-Thomson effect. 34 Interestingly, stabilization of AgNPrs on the surface of various substrate led to preparation of novel portable tools for the in situ recognition of a different targets like drugs and biomarkers.…”