J Mater Sci Technol ›› 2004, Vol. 20 ›› Issue (06): 769-771.

• Research Articles • Previous Articles     Next Articles

Cold Plasma Surface Modification of NiTi for Biomedical Applications

Jun YANG, Jianhua WANG   

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China...
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-11-28 Published:2009-10-10
  • Contact: Jun YANG

Abstract: Surface-grafted poly(ethylene glycol) (PEG) molecules are known to prevent protein adsorption to the surface. Nitinol samples were coated under tetraglyme ECR cold plasma conditions to enhance its biocompatibility. The modified Nitinol surfaces were characterized by high resolution ESCA and contact angle, it was demonstrated that the deposited PEG-like coatings were built up mainly of –CH¬2-CH¬2-O- linkages in surfaces. The surface wettability of the modified Nitinol was increased compared with the control surface. Human plasma protein was adsorbed on Nitinol evaluated by SEM, the protein adsorption on modified surfaces decreased rapidly. Thus, the potential benefits of cold plasma technique will be of use to the biomedical industries improving the biocompatibility of metals.

Key words: Cold plasma, Nitinol, Modification, Protein adsorption