The Physical and Biological Properties of NanoTiO<sub>2</sub> Material
- 1 University of Electronic Science and Technology of China
Abstract
The physical and biological properties of TiO<sub>2</sub> materials including nano TiO<sub>2</sub>, micrometer-TiO<sub>2</sub> and nano TiO<sub>2</sub> tubes have been studied using scanning electron and infrared spectrometer, X-ray diffraction instrument as well as 3-(4,5- dimethylthiazol 2-yl)-2,5 diphenyltetrazolium bromide (MTT) colorimetric method, respectively. These materials are prepared by chemical deposition and anode oxidation methods, respectively. The sizes of nano TiO<sub>2</sub> are 80 nm and 1000 nm, respectively, their infrared properties of absorption are different, the characteristic peaks of the former are 1271,1615, 2957 and 3422 cm<sup>-1</sup>, the latter are 1645 and 2356 cm<sup>-1</sup>. The nano TiO<sub>2</sub> tubes can be formed by anode oxidation method, its diameters are between 50-100 nm, different nano TiO<sub>2</sub> tubes contain different components of oxygen and titanium. In MTT experiment we discover the changes of properties of proliferation of the liver and chick embryo fibroblast cells under influences of nanoTiO<sub>2</sub> relative to those of the controlled groups, when small nanoTiO<sub>2</sub> suspension is added in these cultivated liquids of cell, but the influence of nano TiO<sub>2</sub> on the proliferation of the person’s liver cell is still very small, therefore, the toxicities of nano TiO<sub>2</sub> containing 80nm and 1000 nm to these cells are still first score.
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