title: Synthesis, characterization, and antibacterial activity of silver-doped silica nanocomposite particles.
abstract: Silver nanoparticles were adsorbed preferentially on silica surface to form composite particles using a reverse micelle process that stabilizes the silver particles by an anionic sodium bis(2-ethylhexyl) sulfosuccinate (AOT) surfactant in isooctane solvent together with the silica particles in which their surface being mediated by a cationic poly(allylamine hydrochloride) (PAH) polyelectrolyte. The heterogeneous adsorption was rendered by both electrostatic attraction and hydrophilic/hydrophobic interaction, and was carried out in multiple deposition cycles. The resulting nanocomposite particles were characterized by zeta-potential measurement, electron microscopy, X-ray diffractometry, field-emission electron spectroscopy for chemical analysis (ESCA), and inductively coupled plasma analysis, respectively. In addition, antibacterial activity of the composite particles was examined against Escherichia coli (E. coli) in aqueous environment.
authors: Department of Materials Science and Engineering, National Chung Hsing University, Taichung 402, Taiwan.
authors: Guo-Shu
authors: GS
authors: Chen
authors: Chun-Nan
authors: CN
authors: Chen
authors: Tzu-Tsung
authors: TT
authors: Tseng
authors: Ming-Hsiung
authors: MH
authors: Wei
authors: J H
authors: JH
authors: Hsieh
authors: Wenjea J
authors: WJ
authors: Tseng
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D008826:Microbial Sensitivity Tests; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry* / Q000494:pharmacology*; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology*; D013816:Thermodynamics; D014961:X-Ray Diffraction
chemical_list: D000900:Anti-Bacterial Agents; D012834:Silver; D012822:Silicon Dioxide