期刊
CERAMICS INTERNATIONAL
卷 46, 期 8, 页码 11762-11769出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.01.210
关键词
Mesoporous silica nanoparticle; Strontium; Doping; Biodegradability; Biocompatibility; Ions release
资金
- National Natural Science Foundation of China [31670969, 31571030, 51302089, 31800791]
- Natural Science Foundation of Guangdong Province [2018030310062]
- China Postdoctoral Science Foundation [2016M602601, 2018T110926]
Mesoporous silica nanoparticle (MSN), one of the most widely used nanomaterials, is of poor biodegradability in vivo due to its highly stable Si-O-Si structure. Here, the structural stability of Si-O-Si was regulated by doping strontium ion. Sr-doped MSNs (Sr-MSNs) were synthesized by a cetyltrimethylammonium-bromide-mediated template method and their phase, morphology, structure, physicochemical properties, in vitro degradability and cytocompatibility were investigated. Results indicated that Sr2+ was successfully incorporated into MSN with the collapse of the ordered mesoporous structure. Sr-doping significantly improved the specific surface area, in vitro degradability and cytocompatibility of MSN in a Sr-content-dependent manner. Particularly, excessive Sr-doping gave rise to generating impure strontium silicate which converted into disordered amorphous silica during degradation and hindered the biodegradable behaviors of MSN. Hence, the synthetic Sr-MSNs with excellent surface nature, biodegradability and biocompatibility were supposed to be applied as potential carriers for the controllable release of drugs and ions in numerous clinical applications.
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