Journal
NANOTECHNOLOGY
Volume 19, Issue 43, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/19/43/435608
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Funding
- Australian Research Council (ARC)
- UQ Middle Career Fellowship
- China Scholarship Council (CSC)
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We report a one-step synthesis of magnetic helical mesostructured silica (MHMS) by self-assembly of an achiral surfactant, magnetic nanocrystals with stearic acid ligands and silicate. This core-shell structured material consists of an Fe3O4 superparamagnetic nanocrystal core and a highly ordered periodic helical mesoporous silica shell. We propose that the formation of the helical structure is induced by the interaction between the surfactant and dissociated stearic acid ligands. The MHMS obtained possesses superparamagnetism, uniform mesostructure, narrow pore size distribution, high surface area, and large pore volume. Furthermore, the drug release process is demonstrated using aspirin as a drug model and MHMS as a drug carrier in a sodium phosphate buffer solution.
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