Hydroxyapatite Surfaces Functionalized with a Self-Assembling Peptide: XPS, RAIRS and NEXAFS Study; Nanomaterials; Vol. 10, iss. 6

Hydroxyapatite Surfaces Functionalized with a Self-Assembling Peptide: XPS, RAIRS and NEXAFS Study

Bibliographic Details
Parent link:Nanomaterials
Vol. 10, iss. 6.— 2020.— [1151, 14 p.]
Corporate Author: Национальный исследовательский Томский политехнический университет Исследовательская школа химических и биомедицинских технологий Научно-исследовательский центр "Физическое материаловедение и композитные материалы"
Other Authors: Secchi V. Valeria, Franchi S. Stefano, Dettin M. Monica, Zamuner A. Annj, Beranova K, Klara, Vladesku A. Alina, Battocchio Ch. Chiara, Graziani V. Valerio, Tortora L. Luca, Iucci G. Giovanna
Summary:Title screen
Hydroxyapatite (HAP) coatings can improve the biocompatibility and bioactivity of titanium alloys, such as Ti6Al4V, commonly used as material for orthopedic prostheses. In this framework, we have studied the surface of HAP coatings enriched with Mg and either Si or Ti deposited by RF magnetron sputtering on Ti6Al4V. HAP coatings have been furtherly functionalized by adsorption of a self-assembling peptide (SAP) on the HAP surface, with the aim of increasing the material bioactivity. The selected SAP (peptide sequence AbuEAbuEAbuKAbuKAbuEAbuEAbuKAbuK) is a self-complementary oligopeptide able to generate extended ordered structures by self-assembling in watery solutions. Samples were prepared by incubation of the HAP coatings in SAP solutions and subsequently analyzed by X-ray Photoelectron Spectroscopy (XPS), Fourier Transform Infrared (FTIR) and Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopies, in order to determine the amount of adsorbed peptide, the peptide stability and the structure of the peptide overlayer on the HAP coatings as a function of the HAP substrate and of the pH of the mother SAP solution. Experimental data yielded evidence of SAP adsorption on the HAP surface, and peptide overlayers showed ordered structure and molecular orientation. The thickness of the SAP overlayer depends on the composition of the HAP coating.
Language:English
Published: 2020
Subjects:
электронный ресурс
труды учёных ТПУ
hydroxyapatite
self-assembling peptides
magnetron sputtering
Mg
Si and Ti dopants
XPS
NEXAFS
FTIR
гидроксиапатиты
пептиды
магнетронное распыление
Online Access:https://doi.org/10.3390/nano10061151
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664447

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