Title :
Antibacterial Properties of Nanometer Fe3+-TiO2 Thin Films
Author :
Zhang, Huijun ; Liu, Hongmei ; Mu, Changsheng ; Qiu, Chengjun ; Wu, Dajun
Author_Institution :
Coll. of Electron. Eng., Heilongjiang Univ., Harbin
Abstract :
In order to study antibacterial properties of nanometer TiO2 thin films, nanometer Fe3+-TiO2 films have been prepared on glass by RF magnetron co-sputtering method. The films were characterized by SEM, XRD, and XPS. The influence of Fe element and calcination temperature on the films structure was investigated. The principle of substitution impurity to improve the activity was discussed. The bactericidal activity for the bacteria cells was estimated by relative number of bacteria survived calculated from the number of viable cells which from colonies on the nutrient agar plates. The crystallite size of the anatase phase increases with increasing calcination temperature. XPS results show that doped-Fe is present in the oxide state. The nanometer Fe3+-TiO2 thin films exhibited a high antibacterial activity, which was enhanced with the increase of the temperature of thermal treatment and formation of anatase crystalline structure.
Keywords :
X-ray diffraction; X-ray photoelectron spectra; antibacterial activity; calcination; cellular biophysics; crystallites; iron; microorganisms; nanostructured materials; scanning electron microscopy; sputter deposition; thin films; titanium compounds; RF magnetron cosputtering; SEM; TiO2:Fe; XPS; XRD; anatase crystalline structure; anatase phase; antibacterial properties; bacteria cells; calcination temperature; crystallite size; glass; impurity substitution; nanometer thin films; nutrient agar plates; thermal treatment; Anti-bacterial; Calcination; Crystallization; Glass; Iron; Magnetic properties; Microorganisms; Radio frequency; Temperature; Transistors; Antibacterial film; Calcination; RF magnetron sputtering; TiO2 thin film; acceptor impurity;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2006. NEMS '06. 1st IEEE International Conference on
Conference_Location :
Zhuhai
Print_ISBN :
1-4244-0139-9
Electronic_ISBN :
1-4244-0140-2
DOI :
10.1109/NEMS.2006.334573
