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Issue 28, 2016
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A controllable asymmetrical/symmetrical coating strategy for architectural mesoporous organosilica nanostructures

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Abstract

We describe a facile and controllable asymmetrical/symmetrical coating strategy for the preparation of various novel periodic mesoporous organosilica (PMO) nanostructures, including Au&PMO Janus, Au@PMO yolk–shell and Au@PMO/mSiO2 yolk–double shell nanoparticles, by using Au@SiO2 nanoparticles as seeds. During this process, ammonia first functions as a basic catalyst facilitating the hydrolyzation and condensation of the organosilica precursor, and additionally as an etching agent selectively in situ dissolving the SiO2 shells of Au@SiO2 nanoparticles to form these unique nanostructures. All these three types of nanoparticles have high surface areas, large pore volumes and tailorable cavity structures. Both the Au&PMO and Au@PMO nanoparticles exhibit excellent catalytic activity for the decomposition of H2O2 and the reduction of 4-nitrophenol. Based on these unique structural merits and organic–inorganic hybrid components, the fabricated Janus and hollow PMO nanoparticles show much improved hemocompatibility, which could be further applied in nano-biomedicines without the need for surface modification.

Graphical abstract: A controllable asymmetrical/symmetrical coating strategy for architectural mesoporous organosilica nanostructures

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Publication details

The article was received on 20 Apr 2016, accepted on 09 Jun 2016 and first published on 13 Jun 2016


Article type: Paper
DOI: 10.1039/C6NR03229J
Nanoscale, 2016,8, 13581-13588

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    A controllable asymmetrical/symmetrical coating strategy for architectural mesoporous organosilica nanostructures

    X. Wang, Y. He, C. Liu, Y. Liu, Z. Qiao and Q. Huo, Nanoscale, 2016, 8, 13581
    DOI: 10.1039/C6NR03229J

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