Synthesis and characterization of SiO 2–CaO–P 2O 5 hollow nanospheres for biomedical applications

A ternary system of SiO 2–CaO–P 2O 5 hollow nanospheres has been successfully prepared by sol–gel method using polystyrene (PS) nanospheres as template. The inorganic shell was produced using tetraorthosilicate (TEOS) as the silica source and tri-calciumphospate as calcium and phosphorus sources, re...

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Bibliographic Details
Published inMaterials letters Vol. 67; no. 1; pp. 273 - 276
Main Authors Pappas, G.S., Bilalis, P., Kordas, G.C.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2012
Subjects
Bioceramics
Biomaterials
Hollow nanospheres
Sol–gel preparation
Sol–gel preparation
Hollow nanospheres
Bioceramics
Biomaterials
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Summary:A ternary system of SiO 2–CaO–P 2O 5 hollow nanospheres has been successfully prepared by sol–gel method using polystyrene (PS) nanospheres as template. The inorganic shell was produced using tetraorthosilicate (TEOS) as the silica source and tri-calciumphospate as calcium and phosphorus sources, respectively. The positive surface charge of the template and the [template]/[TEOS] ratio were the key parameters for the creation of a stable primary inorganic network and the further growth of the shell. The removal of the polymeric core through a thermal treatment procedure created an inner void space with mean diameter 250 nm while the outer mean diameter was 330 nm. ► Fine hollow SiO 2-CaO-P 2O 5 nanospheres via core-shell synthesis. ► Structure stability was observed even though the layer was very thin. ► Nanospheres with thinner layer showed transparent at the SEM micrographs.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2011.09.089