Degradation-restructuring induced anisotropic epitaxial growth for fabrication of asymmetric diblock and triblock mesoporous nanocomposites

Xiaomin Li, Tiancong Zhao, Yang Lu, Peiyuan Wang, Ahmed Mohamed El-Toni, Fan Zhang, Dongyuan Zhao

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number1701652
Number of pages8
JournalAdvanced Materials
Volume29
Issue number30
DOIs
Publication statusPublished - 11 Aug 2017
Externally publishedYes

Keywords

  • asymmetric nanostructures
  • janus
  • mesoporous materials
  • nanorods

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