Journal
CHEMISTRY LETTERS
Volume 40, Issue 8, Pages 840-842Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2011.840
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Funding
- Japan Society for the Promotion of Science (JSPS)
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics
- MEXT, Japan
- JST, CREST
- Grants-in-Aid for Scientific Research [09F09502] Funding Source: KAKEN
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Nanoporous silica capsules with mesosized diameter (ca. 60 nm) were prepared by using polystyrene (PS) beads and polyethyleneimine (PEI) as the hierarchic core and shell templates, respectively. The coverage of PEI on the PS beads enhanced the positive charge density on the template surface and favored the formation of well-separated hollow spheres with diameters smaller than 100 nm. By tuning the PEI shell template layer on the solid PS bead templates at different pH values, the shell thickness of the hollow silica sphere could also be controlled at the nanometer level in the range 3-12 nm.
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