Fabrication of Nanoporous surface on biomedical NiTi alloy by surface dealloying of Ni

Author

Xin, Yunchang

Author_Institution

Sch. of Mater. Sci. & Eng., Chongqing Univ., Chongqing, China

fYear

2010

Firstpage

1431

Lastpage

1432

Abstract

Inter-connected nanoporous surface on biomedical NiTi alloy is successfully fabricated by surface dealloying of Ni in a solution containing H₂O₂ and HNO₃. The modified surface layer is believed to be mainly consisted of titanium oxide. Inductive coupled plasma emission spectroscopy (ICP-ES) measurement of solution after dealloying process indicates the much higher concentration of Ni than that of Ti. The removing of Ni from the surface and formation of titanium oxide improves the biocompatibility of NiTi alloy. At the same time, the formed inter-connected nannoporous topography can also benefit osseointegration of implants.

Keywords

biomedical materials; nanobiotechnology; nanofabrication; nanoporous materials; nickel alloys; plasma materials processing; prosthetics; surface alloying; titanium alloys; titanium compounds; NiTi; TiO₂; biocompatibility; biomedical alloy; implants; inductive coupled plasma emission spectroscopy; interconnected nannoporous topography; modified surface layer; nanoporous surface; osseointegration; surface dealloying; titanium oxide; Corrosion; Fabrication; Implants; Nanoporous materials; Nickel alloys; Shape memory alloys; Surface morphology; Surface topography; Surface treatment; Titanium;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanoelectronics Conference (INEC), 2010 3rd International

Conference_Location

Hong Kong

Print_ISBN

978-1-4244-3543-2

Electronic_ISBN

978-1-4244-3544-9

Type

conf

DOI

10.1109/INEC.2010.5424806

Filename

5424806