title: Preparation and antibacterial effects of Ag-SiO2 thin films by sol-gel method.
abstract: In the present study, silver-doped silica thin films were successfully prepared by sol-gel method to apply for antibacterial materials. The starting solution was prepared from 1:0.24:3.75:2.2 molar ratios of Si(OC2H5)4):AgNO3:H2O:C2H5OCH2CH2OH and then the pH value controlled at 3 with 0.5 N HNO3 solution. The formation of silver-doped glassy silica thin films at various temperatures was investigated through infrared spectroscopy, ultraviolet-visible, scanning electron microscopy and X-ray diffraction. From these analysis data, it was found that silver ions were completely trapped in the silica matrix and their reduction could be achieved at 600 degrees C annealing temperature. The antibacterial effects of silica thin films against Escherichia coli and Staphylococcus aureus were examined by film attachment method. The coating films had an excellent antibacterial performance.
authors.affiliation: Department of Chemical Engineering, CPRC, Hanyang University, Seoul 133-791, South Korea.
authors.forename: Hyung-Jun
authors.initials: HJ
authors.lastname: Jeon
authors.forename: Sung-Chul
authors.initials: SC
authors.lastname: Yi
authors.forename: Seong-Geun
authors.initials: SG
authors.lastname: Oh
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis* / Q000493:pharmacokinetics*; D015169:Colony Count, Microbial; D004866:Equipment Contamination / Q000517:prevention & control; D004926:Escherichia coli / Q000166:cytology / Q000187:drug effects; D008422:Materials Testing; D044367:Phase Transition; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry* / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000166:cytology / Q000187:drug effects; D013242:Sterilization / Q000379:methods*; D013499:Surface Properties
chemical_list: D000900:Anti-Bacterial Agents; D020099:Coated Materials, Biocompatible; D012834:Silver; D012822:Silicon Dioxide