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A Facile and Straightforward Strategy to Decorate ZnO Nanoparticles on Graphene Surface: Antimicrobial Property

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We successfully fabricated zinc oxide/reduced graphene oxide (ZnO/rGO) nanocomposite via a simple and environmentally-friendly route using supercritical carbon dioxide (scCO2), where reduction of graphene oxide and growth of ZnO nanoparticles occurred in one-step. Transmission electron microscopic analysis revealed that the ZnO nanoparticles of size 10–20 nm were decorated onto the rGO surface. The ZnO nanoparticles on the rGO surface were spherical and well dispersed. Antibacterial activity of the composite was tested against Escherichia coli, Bacillus cereus, and Staphylococcus aureus as model strains. Minimum inhibitory concentrations (MICs) ranging 0.08–1.3 μg/mL were observed for all the pathogens. The MIC of the composite against the test strains showed that it has a less significant effect on the growth of S. aureus than B. cereus and E. coli. The efficient antibacterial activity was attributed to the synergistic effect of rGO and ZnO nanoparticles.
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Keywords: Antibacterial Activity; Green Solvent; Nanocomposite; Reduced Graphene Oxide; Zinc Oxide

Document Type: Research Article

Affiliations: 1: Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul, 100-715, Republic of Korea 2: Department of Biological Engineering, Biohybrid Systems Research Center (BSRC), Inha University, Incheon, 402-751, Republic of Korea

Publication date: July 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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