Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 428, Issue -, Pages 79-85Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2013.03.038
Keywords
Core/shell; Silica sphere; Mesoporous; Adsorption; Drug delivery
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Funding
- Foundation for Polish Science within FOCUS2010 Program
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In this study, a simple method to coat mesoporous silica layer onto solid silica spheres in a controlled manner via a two-step procedure is reported. Core/shell structured SiO2@m-SiO2 spheres with different shell thickness have been obtained by the application of the optimized hexadecyl trimethyl ammonium bromide/tetraethylorthosilicate (CTAB/TEOS) ratio. The specific surface areas of the obtained samples increase with the shell thickness increase from 25 nm to 90 nm. The adsorption ability, storage and release properties related to mesoporous shell thickness and pore sizes were explicitly investigated with Rhodamine B (RhB) as the model molecules. (C) 2013 Elsevier B.V. All rights reserved.
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