Photoelectron spectroscopic studies of the formation of hydroxyapatite films on titanium pretreated with etidronic acid

Abstract

X-ray photoelectron spectroscopy in the core and valence band region was used to study the formation of hydroxyapatite films on the surface of titanium. The approach used achieves the adhesion of hydroxyapatite by the initial formation of a thin, mainly oxide-free, etidronate film on the metal. In this approach, it was not possible to prepare hydroxyapatite films of any reasonable thickness on the titanium surface without prior treatment with etidronic acid. Because hydroxyapatite is a principal component of teeth and bones, it is likely that the coated metals will have desirable biocompatible properties. The hydroxyapatite film showed no changes when the film was exposed to air, water, and 1 M sodium chloride solution as representative components of the environment of the film in the human body. These films formed on titanium may find application in medical implants. The thin hydroxyapatite and etidronate film on the metal show differential charging effects that caused a doubling of some of the spectral features.

µ-PES Studies on TiNCl and Quasi-two-dimensional Superconductor Na-intercalated TiNCl

“…Coster-Kronig broadening. 43) The spectra were fitted using the minimum number of components and changing their energy position, energy width, and intensity. At least three components were necessary to reproduce the TiNCl spectrum, as shown in Fig.…”

Influence of phytic acid on the corrosion behavior of iron under acidic and neutral conditions

“…The curve fitting of Fe2p core level spectrum generates two pairs of spin orbit doublet peaks with the fixed area ratio 2 : 1 between each Fe2p 3/2 and Fe2p 1/2 component [32]. The Provided that adsorption of PA on the iron surface follows the Langmuir adsorption isotherm…”

Bisphosphonates on Smooth TiO2: Modeling and Characterization

“…C1s high‐resolution spectra of TiO 2 /BP layers presented the same contributions observed on pristine titania. Centered at 286.2 eV, the contribution related to P 2 C*‐O moieties is characteristic of bisphosphonic acids as presented in Figure S3 for bulk etidronate [27] . The decreased area related to carboxyl moieties on the TiO 2 /ETI sample compared with the pristine titania surface is related to competitive adsorption, as observed for ODPA monolayers [16] .…”

“…Centered at 286.2 eV, the contribution related to P 2 C*-O moieties is characteristic of bisphosphonic acids as presented in Figure S3 for bulk etidronate. [27] The decreased area related to carboxyl moieties on the TiO 2 /ETI sample compared with the pristine titania surface is related to competitive adsorption, as observed for ODPA monolayers. [16] No differences were observed with the increased immersion time, indicating that the surface rapidly reached saturation and that 15 m, 2 h, and 24 h may present similar behavior.…”