resumo
Bioglass coatings were prepared by radio frequency magnetron sputtering deposition at low temperature (150 degrees C) onto silicon substrates. The influence of argon pressure values used during deposition (0.2 Pa, 0.3 Pa and 0.4 Pa) on the short-range structure and biomineralization potential of the bioglass coatings was studied. The biomineralization capability was evaluated after 30 days of immersion in simulated body fluid. SEM-EDS, XRD and FTIR measurements were performed. The tests clearly showed strong biomineralization features for the bioglass films. The thickness of the chemically grown hydroxyapatite layers was more than twice greater for the BG films deposited at the highest working pressure, in comparison to those grown on the films obtained at lower working pressures. The paper attempts to explain this experimental fact based on structural and compositional considerations. (C) 2010 Elsevier B.V. All rights reserved.
palavras-chave
PULSED-LASER DEPOSITION; CAO-MGO-SIO2 SYSTEM; STRUCTURAL-ANALYSIS; P2O5 ADDITIVES; COATINGS; HYDROXYAPATITE; TITANIUM; BIOGLASS; SURFACE; BONE
categoria
Chemistry; Materials Science; Physics
autores
Stan, GE; Marcov, DA; Pasuk, I; Miculescu, F; Pina, S; Tulyaganov, DU; Ferreira, JMF
nossos autores
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)agradecimentos
Thanks are due to CICECO for the support and to the Portuguese Foundation for Science and Technology for the fellowship grant of S. Pina (SFRH/BPD/64119/2009) and to Romanian Ministry of Education and Research for the scientific project and financial support (CNMP PN II 71-110/2007). The financial support of