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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Published in | Materials letters Vol. 67; no. 1; pp. 273 - 276 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2012
|
Subjects | |
Online Access | Get full text |
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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. |
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ISSN: | 0167-577X 1873-4979 |
DOI: | 10.1016/j.matlet.2011.09.089 |