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Issue 36, 2011
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All-inorganic core–shell silica–titania mesoporous colloidal nanoparticles showing orthogonal functionality

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Abstract

Colloidal mesoporous silica (CMS) nanoparticles with a thin titania-enriched outer shell showing a spatially resolved functionality were synthesized by a delayed co-condensation approach. The titania-shell can serve as a selective nucleation site for the growth of nanocrystalline anatase clusters. These fully inorganic pure silica-core titania-enriched shell mesoporous nanoparticles show orthogonal functionality, demonstrated through the selective adsorption of a carboxylate-containing ruthenium N3-dye. UV-Vis and fluorescence spectroscopy indicate the strong interaction of the N3-dye with the titania-phase at the outer shell of the CMS nanoparticles. In particular, this interaction and thus the selective functionalization are greatly enhanced when anatase nanocrystallites are nucleated at the titania-enriched shell surface.

Graphical abstract: All-inorganic core–shell silica–titania mesoporous colloidal nanoparticles showing orthogonal functionality

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Supplementary files

Article information


Submitted
25 Dec 2010
Accepted
16 May 2011
First published
10 Aug 2011

J. Mater. Chem., 2011,21, 13817-13824
Article type
Paper

All-inorganic core–shell silicatitania mesoporous colloidal nanoparticles showing orthogonal functionality

V. Cauda, J. M. Szeifert, K. Merk, D. Fattakhova-Rohlfing and T. Bein, J. Mater. Chem., 2011, 21, 13817
DOI: 10.1039/C0JM04528D

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