Highly aminated mesoporous silica nanoparticles with cubic pore structure.

Highly aminated mesoporous silica nanoparticles with cubic pore structure.
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DOI:
10.1021/ja1061664
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发表时间:
2011-01-19
影响因子:
15
通讯作者:
Wiesner U
Wiesner U
中科院分区:
化学1区
文献类型:
--
作者:
Suteewong T;Sai H;Cohen R;Wang S;Bradbury M;Baird B;Gruner SM;Wiesner U

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Mesoporous silica with cubic symmetry has attracted interest from researchers for some times. Here we present the room temperature synthesis of mesoporous silica nanoparticles possessing cubic Pm3̄n symmetry with very high molar ratios (>50%) of 3-aminopropyl triethoxysilane. The synthesis is robust allowing, e.g. for co-condensation of organic dyes without loss of structure. By means of pore expander molecules, the pore size can be enlarged from 2.7 to 5 nm, while particle size decreases. Adding pore expander and co-condensing fluorescent dyes in the same synthesis reduces average particle size further down to 100 nm. After PEGylation, such fluorescent aminated mesoporous silica nanoparticles are spontaneously uptaken by cells as demonstrated by fluorescence microscopy.
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