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Formation pathways of mesoporous silica nanoparticles with dodecagonal tiling.

Abstract：

:Considerable progress in the fabrication of quasicrystals demonstrates that they can be realized in a broad range of materials. However, the development of chemistries enabling direct experimental observation of early quasicrystal growth pathways remains challenging. Here, we report the synthesis of four surfactant-directed mesoporous silica nanoparticle structures, including dodecagonal quasicrystalline nanoparticles, as a function of micelle pore expander concentration or stirring rate. We demonstrate that the early formation stages of dodecagonal quasicrystalline mesoporous silica nanoparticles can be preserved, where precise control of mesoporous silica nanoparticle size down to <30 nm facilitates comparison between mesoporous silica nanoparticles and simulated single-particle growth trajectories beginning with a single tiling unit. Our results reveal details of the building block size distributions during early growth and how they promote quasicrystal formation. This work identifies simple synthetic parameters, such as stirring rate, that may be exploited to design other quasicrystal-forming self-assembly chemistries and processes.Probing the growth pathways of quasicrystalline materials, where tiling units arrange with local but no long-range order, remains challenging. Here, the authors demonstrate that dodecagonal tiling of mesoporous silica nanoparticles occurs via irreversible packing of micelles with non-uniform size distribution.

journal_name

Nat Commun

journal_title

Nature communications

authors

Sun Y,Ma K,Kao T,Spoth KA,Sai H,Zhang D,Kourkoutis LF,Elser V,Wiesner U

doi

10.1038/s41467-017-00351-8

subject

Has Abstract

pub_date

2017-08-15 00:00:00

pages

252

issue

1

issn

2041-1723

pii

10.1038/s41467-017-00351-8

journal_volume

8

pub_type

杂志文章

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