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Molecules 2012, 17(11), 13199-13210; doi:10.3390/molecules171113199
Article

Fabrication of Mesoporous Silica Shells on Solid Silica Spheres Using Anionic Surfactants and Their Potential Application in Controlling Drug Release

1,2,* , 1, 3, 1 and 1
1 King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia 2 Central Metallurgical Research and Development Institute, CMRDI, Helwan 11421, Cairo, Egypt 3 Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Al-Azhar University, Assiut 71111, Egypt
* Author to whom correspondence should be addressed.
Received: 12 September 2012 / Revised: 1 November 2012 / Accepted: 2 November 2012 / Published: 6 November 2012
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Abstract

In this work, mesoporous shells were constructed on solid silica cores by employing anionic surfactante. A co-structure directing agent (CSDA) has assisted the electrostatic interaction between negatively charged silica particles and the negatively charged surfactant molecules. Synthetic parameters such as reaction time and temperature had a significant impact on the formation of mesoporous silica shelld and their textural properties such as surface area and pore volume. Core-mesoporous shell silica spheres were characterized by small angle X-ray scattering, transmission electron microscopy, and N2 adsorption–desorption analysis. The synthesized particles have a uniformly mesoporous shell of 34–65 nm and possess a surface area of ca. 7–324 m2/g, and pore volume of ca. 0.008–0.261 cc/g. The core-mesoporous shell silica spheres were loaded with ketoprofen drug molecules. The in vitro drug release study suggested that core-mesoporous shell silica spheres are a suitable nanocarrier for drug molecules offering the possibility of having control over their release rate.
Keywords: core-shell; mesoporous; anionic surfactant; drug delivery core-shell; mesoporous; anionic surfactant; drug delivery
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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El-Toni, A.M.; Khan, A.; Ibrahim, M.A.; Al-Hoshan, M.; Labis, J.P. Fabrication of Mesoporous Silica Shells on Solid Silica Spheres Using Anionic Surfactants and Their Potential Application in Controlling Drug Release. Molecules 2012, 17, 13199-13210.

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