Photocatalytic Deposition of Hydroxyapatite onto a Titanium Dioxide Nanotubular Layer with Fine Tuning of Layer Nanoarchitecture

详细信息    查看全文

• 作者：Sviatlana A. Ulasevich ; Sergey K. Poznyak ; Anatoly I. Kulak ; Aleksey D. Lisenkov ; Maksim Starykevich ; Ekaterina V. Skorb
• 刊名：Langmuir
• 出版年：2016
• 出版时间：April 26, 2016
• 年：2016
• 卷：32
• 期：16
• 页码：4016-4021
• 全文大小：419K
• 年卷期：0
• ISSN：1520-5827

文摘

A new effective method of photocatalytic deposition of hydroxyapatite (HA) onto semiconductor substrates is proposed. A highly ordered nanotubular TiO₂ (TNT) layer formed on titanium via its anodization is chosen as the photoactive substrate. The method is based on photodecomposition of the phosphate anion precursor, triethylphosphate (TEP), on the semiconductor surface with the following reaction of formed phosphate anions with calcium cations presented in the solution. HA can be deposited only on irradiated areas, providing the possibility of photoresist-free HA patterning. It is shown that HA deposition can be controlled via pH, light intensity, and duration of the process. Energy-dispersive X-ray spectroscopy profile analysis and glow discharge optical emission spectroscopy of HA-modified TNT prove that HA deposits over the entire TNT depth. High biocompatibility of the surfaces is proven by protein adsorption and pre-osteoblast cell growth.