Document Detail

Formation of a nano-pattering NiTi surface with Ni-depleted superficial layer to promote corrosion resistance and endothelial cell-material interaction.
MedLine Citation:
PMID:  23053806     Owner:  NLM     Status:  Publisher    
Zirconium ion implantation was performed on NiTi alloy to suppress Ni ion release as well as to improve corrosion resistance and cell-material interaction. A thicker Ni-depleted nano-scale composite layer formed after Zr implantation and the corrosion resistance was evidently increased in aspects of increased E (br) - E (corr) (difference between corrosion potential and breakdown potential) and decreased corrosion current density. 2.5/2 NiTi sample possessed the highest E (br) - E (corr), more than 500 mV higher than that of untreated NiTi, suggesting a significant improvement on pitting corrosion resistance. Ni ion release rate of Zr-NiTi was decreased due to the depletion of Ni in the superficial surface layer and the diffusion resistance effect of the ZrO(2)/TiO(2) nano-film. Increased surface wettability induced by increased surface roughness was obtained after Zr implantation. Zr-NiTi samples were found to be favorable to endothelial cells (ECs) proliferation, especially after 5 and 7 days culture.
Tingting Zhao; Yan Li; Yun Xia; Subbu S Venkatraman; Yan Xiang; Xinqing Zhao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-2
Journal Detail:
Title:  Journal of materials science. Materials in medicine     Volume:  -     ISSN:  1573-4838     ISO Abbreviation:  J Mater Sci Mater Med     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9013087     Medline TA:  J Mater Sci Mater Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
School of Materials Science and Engineering, Beihang University, #37, Xueyuan Road, Beijing, 100191, People's Republic of China.
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