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Synthesis, Characterizations of Superparamagnetic Fe3O4–Ag Hybrid Nanoparticles and Their Application for Highly Effective Bacteria Inactivation

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In recent years, outbreaks of infectious diseases caused by pathogenic micro-organisms pose a serious threat to public health. In this work, Fe3O4-Ag hybrid nanoparticles were synthesized by simple chemistry method and these prepared nanoparticles were used to investigate their antibacterial properties and mechanism against methicilline-resistant Staphylococcus aureus (MRSA) pathogen. The formation of dimer-like nanostructure of Fe3O4–Ag hybrid NPs was confirmed by X-ray diffraction and High-resolution Transmission Electron Microscopy. Our biological analysis revealed that the Fe3O4–Ag hybrid NPs showed more noticeable bactericidal activity than that of plain Fe3O4 NPs and Ag-NPs. We suggest that the enhancement in bactericidal activity of Fe3O4–Ag hybrid NPs might be likely from main factors such as: (i) enhanced surface area property of hybrid nanoparticles; (ii) the high catalytic activity of Ag-NPs with good dispersion and aggregation stability due to the iron oxide magnetic carrier, and (iii) large direct physical contacts between the bacterial cell membrane and the hybrid nanoparticles. The superparamagnetic hybrid nanoparticles of iron oxide magnetic nanoparticles decorated with silver nanoparticles can be a potential candidate to effectively treat infectious MRSA pathogen with recyclable capability, targeted bactericidal delivery and minimum release into environment.
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Keywords: Chemical Synthesis; Composite Materials; Electron Microscopy; Magnetic Materials

Document Type: Research Article

Affiliations: 1: Department of Physics, Tien Giang University, My Tho City, Tien Giang Province 86000, Vietnam 2: Department of Nanoscience and Nanotechnology, Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), Hai Ba Trung District, Hanoi 10000, Vietnam 3: Department of Physics, Hanoi University of Science, 334 Nguyen Trai, Thanh Xuan, Ha Noi 10000, Vietnam 4: Institute of Physics at Ho Chi Minh City, Vietnam Academy of Science and Technology (VAST), Ho Chi Minh 70000, Vietnam 5: Department of Micro-and Nanotechnology, Technical University of Denmark Building 345Ø, Ørsted Plads, Kgs Lyngby 2800, Denmark 6: National Institute of Hygiene and Epidemiology (NIHE), 1-Yersin Street, Hai Ba Trung District, Hanoi 10000, Vietnam

Publication date: 01 June 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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