An ex situ study of the adsorption of calcium phosphate from solution onto TiO2(110) and Al2O3(0001)

作者：Murphy M; Walczak M S; Hussain H; Acres M J; Muryn C A; Thomas A G; Silikas N; Lindsay R^*

来源：Surface Science, 2016, 646: 146-153.

DOI：10.1016/j.susc.2015.08.040

• Metal oxide
• Low Miller index single crystal surface
• Aqueous solution
• Deposition surface composition
• Film growth

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 center dot H2O and KH2PO4 onto rutile-TiO2(110) and alpha-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 alpha-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.

• 出版日期2016-4