Degradation‐Restructuring Induced Anisotropic Epitaxial Growth for Fabrication of Asymmetric Diblock and Triblock Mesoporous Nanocomposites

A novel degradation‐restructuring induced anisotropic epitaxial growth strategy is demonstrated for the synthesis of uniform 1D diblock and triblock silica mesoporous asymmetric nanorods with controllable rod length (50 nm to 2 µm) and very high surface area of 1200 m2 g−1. The asymmetric diblock me...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2017-08, Vol.29 (30), p.n/a
Main Authors: Li, Xiaomin, Zhao, Tiancong, Lu, Yang, Wang, Peiyuan, El‐Toni, Ahmed Mohamed, Zhang, Fan, Zhao, Dongyuan
Format: Article
Language:English
Subjects:
Anisotropy
asymmetric nanostructures
Asymmetry
Degradation
Epitaxial growth
Ethane
Gold
janus
Materials science
mesoporous materials
Nanocomposites
Nanorods
Nanospheres
Near infrared radiation
Porosity
Porous materials
Silica
Silicon Dioxide
Surface area
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Summary:A novel degradation‐restructuring induced anisotropic epitaxial growth strategy is demonstrated for the synthesis of uniform 1D diblock and triblock silica mesoporous asymmetric nanorods with controllable rod length (50 nm to 2 µm) and very high surface area of 1200 m2 g−1. The asymmetric diblock mesoporous silica nanocomposites are composed of a 1D mesoporous organosilicate nanorod with highly ordered hexagonal mesostructure, and a closely connected dense SiO2 nanosphere located only on one side of the nanorods. Furthermore, the triblock mesoporous silica nanocomposites constituted by a cubic mesostructured nanocube, a nanosphere with radial mesopores, and a hexagonal mesostructured nanorod can also be fabricated with the anisotropic growth of mesopores. Owing to the ultrahigh surface area, unique 1D mesochannels, and functionality asymmetry, the obtained match‐like asymmetric Au‐NR@SiO2&EPMO (EPMO = ethane bridged periodic mesoporous organosilica) mesoporous nanorods can be used as an ideal nanocarrier for the near‐infrared photothermal triggered controllable releasing of drug molecules. A novel degradation‐restructuring induced anisotropic epitaxial growth strategy is demonstrated for the synthesis of uniform 1D asymmetric diblock and triblock mesoporous nanorods.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201701652