title: Facile synthesis of Ag nanoparticles supported on MWCNTs with favorable stability and their bactericidal properties.
abstract: Stable Ag nanoparticles supported on multi-walled carbon nanotubes (MWCNTs) have been successfully synthesized by calcinations of the complexes of Ag cation and acid-treated MWCNTs under sparging N(2). The nanocomposites are characterized in detail by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy. The results indicate that Ag nanoparticles are relatively homogeneously dispersed on the surface of MWCNTs. The bactericidal properties of Ag/MWCNT nanocomposites are investigated with disk diffusion assay on the suspension samples inoculated with Escherichia coli. The results show that Ag/MWCNTs-500 nanocomposites possess excellent bactericidal property because of their suitable particle size (15 nm). Moreover, Ag nanoparticles supported on MWCNTs are very stable for half a year. What is more, the bactericidal effect was enhanced obviously under solar irradiation. This is because MWCNTs can absorb near-infrared light to kill parts of bacteria. A possible formation mechanism is also proposed in this article.
authors.affiliation: Department of Epidemiology and Biostatistics, Harbin Medical University, Harbin 150086, People's Republic of China.
authors.forename: Zhenzi
authors.initials: Z
authors.lastname: Li
authors.forename: Lijun
authors.initials: L
authors.lastname: Fan
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.forename: Kang
authors.initials: K
authors.lastname: Li
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D037742:Nanotubes, Carbon; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D037742:Nanotubes, Carbon; D012834:Silver