Loading...

Investigation of the Antibacterial Property of TiO2/Ag Nanotubes

Esfandiari, Naeemeh | 2011

643 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42277 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Simchi, Abdolreza; Bagheri, Reza
  7. Abstract:
  8. This study was performed to synthesize Ag-doped TiO2 nanotubes and investigate the antibacterial property of the nanostructure. In the first step, self-organized TiO2 nanotubes were fabricated through anodizing in an electrolyte containing 0٫3 Wt% NH4F, 0٫2٪V DI water and ethylene glycol. Anodizing was performed in 30 and 60V for 2hrs in order to have different nanotube diameters. In the second step, photoreduction process was done on the way to dope Ag nanoparticles on the nanotubes. Herein, AgNO3 solution concentration, time period of TiO2 nanotubes soaking in the solution, time period of UV irradiation and ethanol solution concentration were taken as factors to achieve Ag nanoparticles in different sizes and numbers and investigate their effect on antibacterial property. The tests in the photoreduction step were programmed based on taguchi method to restrict them. Afterwards, antibacterial test was done by using E.Coli ATCC 11105 bacterium to evaluate the nanostructure's ability in bacterium elimination. The results revealed that decrease in the size of Ag nanoparticles to 30nm and increase in TiO2 nanotubes upto 100nm results in a 98٪ increase in antibacterial activity. Furthermore, increasing the size of Ag nanoparticles changes the shape of nanoparticles from spherical to dendritic, indicating the importance of nanostructure shape on improving antibacterial property of the nanostructure, in addition to its size
  9. Keywords:
  10. Titanium Dioxide ; Silver ; Antimicrobial Activity ; E.Coli Bacteria ; Implants ; Titanium ; Titanium Oxide Nanotube

 Digital Object List

  • سنتز و بررسي خاصيت ضدباكتري
  •   view

 Bookmark

No TOC