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Issue 20, 2012
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Highly ordered periodic mesoporous organosilica nanoparticles with controllable pore structures

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Abstract

A general synthetic procedure for highly ordered and well-dispersed periodic mesoporous organosilica (PMO) nanoparticles is reported based on a single cationic surfactant cetyltrimethylammonium bromide (CTAB) and simple silica sources with organic bridging groups via an ammonia-catalyzed sol–gel reaction. By changing the bridging group in the silica sources, the pore structures of the as-made particles with three-dimensional hexagonal (P63/mmc), cubic (Pm3n), two-dimensional hexagonal (P6mm), and wormlike structure were evidenced by powder X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The size range of the nanoparticles can be adjusted from 30 nm to 500 nm by variation of the ammonia concentration or the co-solvent content of the reaction medium. The PMO nanoparticles with high concentration of organic groups in the framework offered good thermal stability, good dispersion in low polarity solvent and high adsorption of small hydrophobic molecules. Finally, the dye functionalized PMO nanoparticles show low cytotoxicity and excellent cell permeability, which offers great potential for biomedical applications.

Graphical abstract: Highly ordered periodic mesoporous organosilica nanoparticles with controllable pore structures

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Supplementary files

Article information


Submitted
29 Jun 2012
Accepted
23 Aug 2012
First published
28 Aug 2012

Nanoscale, 2012,4, 6588-6596
Article type
Paper

Highly ordered periodic mesoporous organosilica nanoparticles with controllable pore structures

B. Guan, Y. Cui, Z. Ren, Z. Qiao, L. Wang, Y. Liu and Q. Huo, Nanoscale, 2012, 4, 6588
DOI: 10.1039/C2NR31662E

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