Surface modifications of plasma-sprayed bioglasses upon interaction with phosphate buffer and albumin solutions: A photoelectron spectroscopy study

G. Iucci, A. Frontini, G. Infante, C. Furlani, L. Avigliano, N. Rosato, D. Del Principe, G. Palumbo, G. Polzonetti

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)40-44
Number of pages5
JournalSurface and Interface Analysis
Volume30
Issue number1
DOIs
Publication statusPublished - Aug 2000

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

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