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Fibrinogen adsorption onto 316L stainless steel, Nitinol and titanium

被引：61
作者：
Bai, Zhijun [1 ,2 ]
Filiaggi, M. J. [2 ,3 ]
Dahn, J. R. [1 ,4 ]
机构：
[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada
[2] Dalhousie Univ, Sch Biomed Engn, Halifax, NS B3H 3J5, Canada
[3] Dalhousie Univ, Fac Dent, Dept Appl Oral Sci, Halifax, NS B3H 3J5, Canada
[4] Dalhousie Univ, Dept Chem, Halifax, NS B3H 3J5, Canada
来源：
SURFACE SCIENCE | 2009年 / 603卷 / 06期
关键词：
Protein adsorption; Fibrinogen; Adsorption isotherm; Adsorption kinetics; Wavelength dispersive spectroscopy; Spectroscopic ellipsometry; BET isotherm; Multilayer structure; ATOMIC-FORCE MICROSCOPY; ACUTE INFLAMMATORY RESPONSES; PROTEIN ADSORPTION; OXIDE SURFACES; NANOMETER-SCALE; CONFORMATIONAL-CHANGES; BIOMATERIAL SURFACES; ELECTRON-MICROPROBE; ADSORBED PROTEIN; SERUM-ALBUMIN;
D O I：
10.1016/j.susc.2009.01.040
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070305 [高分子化学与物理];
摘要：
Fibrinogen adsorption onto mechanically polished biomedical grade 316L stainless steel (316LSS), nickel titanium alloy (Nitinol) and commercially pure titanium (CpTi) surfaces were studied by measurements of adsorption isotherms and adsorption kinetics using an ex-situ wavelength dispersive spectroscopy technique (WDS). Surface composition, roughness and wettability of these materials were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and water contact angle (WCA) measurements. Adsorption isotherm results showed that surface protein concentration on these materials increased with increasing concentration of fibrinogen in phosphate buffer solution. The fibrinogen adsorption isotherms were modeled by both the monolayer Langmuir isotherm and the multilayer Brunauer-Emmett-Teller (BET) isotherm. The results strongly suggest that fibrinogen forms multilayer structures on these materials when the concentration in solution is high. Complementary measurements on the absorbed fibrinogen films by spectroscopic ellipsometry (SE) support this view. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：839 / 846
页数：8
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