investigating the structural, optical and antibacterial properties of go, go: ag, go: zno thin layers and go: zno/ go: ag bilayers synthesized by spray pyrolysis method

Graphene oxide thin layers, graphene oxide:silver nano-composite, graphene oxide:zinc oxide nanocomposite and graphene oxide:zinc oxide/graphene oxide:silver bilayer were deposited by spray pyrolysis method. the synthesized thin layers were characterized using x-ray diffraction spectroscopy, field emission scanning electron microscope, energy dispersive x-ray spectroscopy and raman spectroscopy. the optical properties and the band gap of the thin layers were also studied and calculated using the tauc equation. gram-negative bacterium of escherichia coli was used to study the antibacterial properties of thin layers. the results showed that among the thin layers investigated, go:zno/go:ag bilayer had the greatest effect on the inhibition of e. coli growth and was able to control the growth of bacterium after 2 hours.