title: Fabrication of thin film TiO2 nanotube arrays on Co-28Cr-6Mo alloy by anodization.
abstract: Titanium oxide (TiO2) nanotube arrays were prepared by anodization of Ti/Au/Ti trilayer thin film DC sputtered onto forged and cast Co-28Cr-6Mo alloy substrate at 400 °C. Two different types of deposited film structures (Ti/Au/Ti trilayer and Ti monolayer), and two deposition temperatures (room temperature and 400 °C) were compared in this work. The concentrations of ammonium fluoride (NH4F) and H2O in glycerol electrolyte were varied to study their effect on the formation of TiO2 nanotube arrays on a forged and cast Co-28Cr-6Mo alloy. The results show that Ti/Au/Ti trilayer thin film and elevated temperature sputtered films are favorable for the formation of well-ordered nanotube arrays. The optimized electrolyte concentration for the growth of TiO2 nanotube arrays on forged and cast Co-28Cr-6Mo alloy was obtained. This work contains meaningful results for the application of a TiO2 nanotube coating to a CoCr alloy implant for potential next-generation orthopedic implant surface coatings with improved osseointegrative capabilities.
authors.affiliation: State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Jiahua
authors.initials: J
authors.lastname: Ni
authors.forename: Christine J
authors.initials: CJ
authors.lastname: Frandsen
authors.forename: Kunbae
authors.initials: K
authors.lastname: Noh
authors.forename: Gary W
authors.initials: GW
authors.lastname: Johnston
authors.forename: Guo
authors.initials: G
authors.lastname: He
authors.forename: Tingting
authors.initials: T
authors.lastname: Tang
authors.forename: Sungho
authors.initials: S
authors.lastname: Jin
mesh_terms: D004560:Electricity; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry; D006801:Humans; D008422:Materials Testing / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010006:Osteoblasts / Q000166:cytology / Q000187:drug effects / Q000648:ultrastructure; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000494:pharmacology*; D014800:Vitallium / Q000494:pharmacology*
chemical_list: D004573:Electrolytes; D014800:Vitallium; C009495:titanium dioxide; D014025:Titanium
keywords: Anodization; CoCr alloy; Next-generation orthopedic implant; TiO(2) nanotube