Formation of super-hydrophilic surface of hydroxyapatite by ion implantation and plasma treatment

• Published in: Surface & coatings technology Vol. 196; no. 1; pp. 303 - 306
• Main Authors: Okabe, Yoshio, Kurihara, Sinya, Yajima, Tatsuhiko, Seki, Yoichi, Nakamura, Isao, Takano, Ichiro
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 22-06-2005; Elsevier
• Subjects: Applied sciences; Contact angle; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Hydroxypatite; Ion implementation; Materials science; Metals. Metallurgy; Nonmetallic coatings; Other topics in materials science; Physics; Plasma treatment; Production techniques; Surface treatment; Hydroxypatite; Ion implementation; Contact angle; Plasma treatment; Plasma; Biomedical materials; Ion implantation; Surface treatments; Hydroxyapatite
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2004.08.190

Control of the hydrophilic properties of hydroxyapatite Ca
10(PO
4)
6(OH)
2 (HAp) is important for the use of biocompatible materials. From this standing point, hydroxyapatite was implanted with N
2
+, O
2
+ and Ar
+ with 1×10
17–1×10
21 ions m
−2 at an energy of 20 keV. It was also immersed in an RF plasma of Ar, C
2H
5OH, CH
3OH and CF
4 induced at RF power of 50–150 W. Contact angles for various specimens were measured and the formation mechanism of hydrophilic surfaces are discussed.
Hydrophilic HAp surfaces were formed by N
2
+, O
2
+ and Ar
+ implantations and plasma treatments of Ar, C
2H
5OH and CH
3OH, with contact angles from 10° to 60°. Only the CF
4 plasma treatment can form super-hydrophilic surfaces with contact angles of 4–8°. The hydrophilic and super-hydrophilic formation mechanism was discussed based on analysis of XPS data.