Bioactivity of L-b-L Self-Assembly TiO₂ Hollow Spheres by UV Irradiation Enhanced

Abstract:

Using nano-TiO₂ particles obtained by hydrolysis of titanium oxysulfate (TiOSO₄) as the precursor, and polystyrene (PS) spheres as the template, TiO₂ hollow spheres were successfully deposited on CPTi substrates through layer-by-layer self-assembly technology. After ultraviolet light (UV) irradiation, the TiO₂ coatings were soaked in simulated body fluid (SBF) to explore their bioactivities. The effects of UV irradiation time and UV irradiation media on the bioactivities of nano TiO₂ coatings were investigated. The results show that bone-like apatite can be formed on the surface of nano TiO₂ coating irradiated by UV, and this reveals that the irradiated coating has good bioactivity. The amount of apatite formed on the surface of the coating increases with the increase of UV irradiation time. UV-irradiated media also influence the bioactivity of the coating. The bioactivities of nano TiO₂ coatings irradiated in air and SBF are better than that in water.

• Periodical: Advanced Materials Research (Volumes 328-330)
• Pages: 1495-1498
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.328-330.1495
• Online since: September 2011
• Authors: Fan Xiao, Wei Li, Fei Gao, Zhi Xian Zhang
• Keywords: Bioactivity, Self-Assembly, TiO₂ Hollow Sphere, Uv Irradiation

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