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A poly(ethylene glycol) (PEG-like) coating was developed to improve the biocom-patibility of Nickel-Titanium (NiTi) alloy implants.The PEG-like macromolecular coatings weredeposited on NiTi substrates at a room temperature of 298 K through a ECR (electron-cyclotronresonance) cold-plasma enhanced chemical vapor deposition method using tetraglyme (CH_3-O-(CH_2-CH_2-O)_4-CH_3) as a precursor.A power supply with a frequency of 2.45 GHz was applied toignite the plasma with Ar(argon) used as the carrier gas.Based on the atomic force microscopy(AFM) studies,a thin smooth coating on NiTi substrates with highly amorphous functional groupson the modified NiTi surfaces were mainly the same accumulated stoichiometric ratio of C and Owith PEG.The vitro studies showed that platelet-rich plasma (PRP) adsorption on the modifiedNiTi alloy surface was significantly reduced.This study indicated that plasma surface modificationchanges the surface components of NiTi alloy and subsequently improves its biocompatibility.
A poly (ethylene glycol) (PEG-like) coating was developed to improve the biocompatibility of Nickel-Titanium (NiTi) alloy implants. PEG-like macromolecular coatings were deposited on NiTi substrates at a room temperature of 298 K through a ECR (electron-cyclotron resonance) cold-plasma enhanced chemical vapor deposition method using tetraglyme (CH_3-0- (CH_2-CH_2-O) _4-CH_3) as a precursor. A power supply with a frequency of 2.45 GHz was applied toignite the plasma with Based on the atomic force microscopy (AFM) studies, a thin smooth coating on NiTi substrates with the modified NiTi surfaces were mainly the same stoichiometric ratio of C and Owith PEG. The in vitro studies showed that platelet-rich plasma (PRP) adsorption on the modified NiTi alloy surface was significantly reduced. This study indicated that plasma surface modification changes in the surface components of NiTi alloy and subsequently improves its bioc ompatibility.