Antibacterial Activity of Magnetic Fe3O4/X (X=Ag, Cu, Au) Nanocomposites Modified with Ionic Liquid

karimiasl, Moslem | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44726 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Gholami, Mohammad Reza
  7. Abstract:
  8. In this thesis, Fe3O4 magnetic nanoparticles were produced using co-precipitation method. The surface of these magnetic nanoparticles is modified by ionic-liquid groups, and then coated with Cu, Au and Ag metals. These nanoparticles were unstable before their surface modification, so that they were easily agglomerated. However, after their surface is modified with ionic-liquid, they become very stable and are easily solved in polar and non-polar solvents. This solubility depends on the alkyls groups connected to the ionic-liquid. Magnetic nano composites Fe3O4/X (X=Ag, Cu, Au) modified by ionic-liquid are prepared by absorbing Cu(NO3)2, HAuClO4 and AgNO3 salts on the surface of modified magnetic nanoparticles. This process is accomplished through ion substitution with ionic-liquid groups and then reduction by NaBH4. In this research, the above mentioned modified nano composites were used for bacteria destruction. Results indicated that the highest level of bacteria destruction is achieved when the surface of the magnetic nanoparticle is coated with Au particles. The lowest level of destruction is when Ag is used to coat the nanoparticles. These nano composites are easily separated from the reaction mixture by applying an external magnetic field so that they can be used many times
  9. Keywords:
  10. Magnetic Nanodot ; Ionic Liquids ; Antibacterial Activity ; Composite ; Escherichia Coli Bacteria ; Staphylococcus Aureus

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