TY - JOUR
T1 - Surface modifications of plasma-sprayed bioglasses upon interaction with phosphate buffer and albumin solutions
T2 - A photoelectron spectroscopy study
AU - Iucci, G.
AU - Frontini, A.
AU - Infante, G.
AU - Furlani, C.
AU - Avigliano, L.
AU - Rosato, N.
AU - Del Principe, D.
AU - Palumbo, G.
AU - Polzonetti, G.
PY - 2000/8
Y1 - 2000/8
N2 - 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.
AB - 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.
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U2 - 10.1002/1096-9918(200008)30:1<40::AID-SIA812>3.0.CO;2-B
DO - 10.1002/1096-9918(200008)30:1<40::AID-SIA812>3.0.CO;2-B
M3 - Article
AN - SCOPUS:0034245123
VL - 30
SP - 40
EP - 44
JO - Surface and Interface Analysis
JF - Surface and Interface Analysis
SN - 0142-2421
IS - 1
ER -