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Plasma‐controlled nanocrystallinity and phase composition of TiO 2 : A smart way to enhance biomimetic response
Author(s) -
Zhou Wei,
Zhong Xiaoxia,
Wu Xiaochen,
Yuan Luqi,
Shu Qiwei,
Xia Yuxing,
Ostrikov Kostya Ken
Publication year - 2007
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.30987
Subject(s) - materials science , nanocrystal , sputter deposition , chemical engineering , apatite , phase (matter) , crystal growth , substrate (aquarium) , nanotechnology , sputtering , crystal (programming language) , thin film , crystallography , organic chemistry , chemistry , oceanography , programming language , geology , computer science , engineering
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. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res, 2007