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Surface modifications of plasma‐sprayed bioglasses upon interaction with phosphate buffer and albumin solutions: a photoelectron spectroscopy study
Author(s) -
Iucci G.,
Frontini A.,
Infante G.,
Furlani C.,
Avigliano L.,
Rosato N.,
Del Principe D.,
Palumbo G.,
Polzonetti G.
Publication year - 2000
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/1096-9918(200008)30:1<40::aid-sia812>3.0.co;2-b
Subject(s) - x ray photoelectron spectroscopy , overlayer , soda lime , chemistry , layer (electronics) , phosphate , analytical chemistry (journal) , surface layer , albumin , buffer (optical fiber) , silicate , chemical composition , phosphate glass , chemical engineering , chromatography , organic chemistry , biochemistry , computer science , engineering , telecommunications
X‐ray photoelectron spectroscopy (XPS) was used to define the chemical composition of the outermost surface layer and the surface modification of a plasma‐coated phospho‐silicate glass (identified as BVA) when immersed in potassium phosphate buffer or in phosphate‐buffered human albumin solution. Its behaviour was compared with that of a soda‐lime‐based glass (identified as BVH) treated in the same way. The surface percentage composition of plasma‐sprayed glass was consistent with the bulk composition. After incubation with buffer, a Ca–P‐rich layer developed only on the surface of BVA glass. Human serum albumin was bound reversibly to both glasses; however, the protein completely covered the BVA glass surface within 24 h, with the formation of a mixed albumin–Ca–P layer, whereas 4 days of incubation were necessary for complete coverage of the BVH glass surface. The thickness of the organic/inorganic overlayer has also been estimated. Copyright © 2000 John Wiley & Sons, Ltd.