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

fYear

2006

fDate

18-21 Jan. 2006

Firstpage

955

Lastpage

958

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NEMS.2006.334573

Filename

4135106