Preparation of core-shell mesoporous silica nanoparticles with bimodal pore structures by regrowth method

Hirotaka Ishii, Takaaki Ikuno, Atsushi Shimojima, Tatsuya Okubo*

*この研究の対応する著者

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Core-shell structured mesoporous silica nanoparticles (MSNs) with different pore characteristics in the cores and shells have been prepared by the regrowth method. Adding a silica source to a dispersion of presynthesized silica-surfactant composite nanoparticles with two-dimensional hexagonal mesostructures results in regrowth in preference to generation of new particles. Core-shell MSNs with bimodal porosities are easily obtained by adding a pore-expanding agent, 1,3,5-trimethylbenzene, in either the core or shell formation step. Detailed characterization of the core-shell MSNs reveals that the shells consist of disordered arrangements of relatively large or small pores and that the pore sizes in the cores change when the shells formed. Core-shell MSNs will be useful for controlling the release rates of the encapsulated guest molecules and for protecting internal pores from being plugged by other species.

本文言語English
ページ(範囲)57-64
ページ数8
ジャーナルJournal of Colloid And Interface Science
448
DOI
出版ステータスPublished - 2015 6月 5

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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