Published in
Elsevier, Surface Science, (646), p. 146-153, 2016
DOI: 10.1016/j.susc.2015.08.040
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An ex situ study of the adsorption of calcium phosphate from solution onto TiO2(110) and Al2O3(0001)
,
M. J. Acres,
C. A. Muryn,
A. G. Thomas,
N. Silikas,
R. Lindsay,
M. S. Walczak H Hussain M J. Acres C A. Muryn A G. Thomas N Silikas and R. Lindsay M. Murphy,
M. S. Walczak H Hussain M J. Acres C A. Muryn A G. Thomas N Silikas R Lindsay M. Murphy
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Abstract
Ex situ atomic force microscopy and x-ray photoelectron spectroscopy are employed to characterise the adsorption of calcium phosphate from an aqueous solution of CaCl2.H2O and KH2PO4 onto rutile-TiO2(110) and α-Al2O3(0001). Prior to immersion, the substrates underwent wet chemical preparation to produce well-defined surfaces. Calcium phosphate adsorption is observed on both rutile-TiO2(110) and α-Al2O3(0001), with atomic force microscopy images indicating island-type growth. In contrast to other studies on less well-defined TiO2 and Al2O3 substrates, the induction period for calcium phosphate nucleation appears to be comparable on these two surfaces. ; - An ex situ study of the adsorption of calcium phosphate from solution onto TiO2(110) and Al2O3(0001) -