Plasma-controlled nanocrystallinity and phase composition of TiO2: a smart way to enhance biomimetic response.
This contribution sheds light on the role of crystal size and phase composition in inducing biomimetic apatite growth on the surface of nanostructured titania films synthesized by reactive magnetron sputtering of Ti targets in Ar+O(2) plasmas. Unlike most existing techniques, this method enables one to deposit highly crystalline titania films with a wide range of phase composition and nanocrystal size, without any substrate heating or postannealing. Moreover, by using this dry plasma-based method one can avoid surface hydroxylation at the deposition stage, almost inevitable in wet chemical processes. Results of this work show that high phase purity and optimum crystal size appear to be the essential requirement for efficient apatite formation on magnetron plasma-fabricated bioactive titania coatings.
Zhou
Wei
W
Department of Physics, Shanghai Jiao Tong University, 200030 Shanghai, People's Republic of China.
Zhong
Xiaoxia
X
Wu
Xiaochen
X
Yuan
Luqi
L
Shu
Qiwei
Q
Xia
Yuxing
Y
Ostrikov
Kostya Ken
KK
D001031:Apatites / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry*; D040761:Biomimetic Materials / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D066298:In Vitro Techniques; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D019736:Prostheses and Implants; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D001031:Apatites; D001672:Biocompatible Materials; D020099:Coated Materials, Biocompatible; C009495:titanium dioxide; D014025:Titanium