Dendritic silica nanoparticles synthesized by a block copolymer-directed seed-regrowth approach

Junzheng Wang, Ayae Sugawara-Narutaki, Atsushi Shimojima, Minoru Osada, Renzhi Ma, Tatsuya Okubo*

*この研究の対応する著者

研究成果: Article査読

7 被引用数 (Scopus)

抄録

A facile seed regrowth method is presented for the preparation of a new type of colloidal dendritic silica nanoparticles (DSNPs) with unique Konpeito-like morphology and high surface area (â4400 m2 g-1). Growth of silica nanoprotrusions on the surfaces of colloidal silica nanoparticles proceeds by hydrolysis and polycondensation of tetraethoxysilane (TEOS) in the presence of a PEO-PPO-PEO-type block copolymer (Pluronic F127) under controlled pH conditions. The polymers adsorbed on the seed surface play a crucial role in the formation of DSNPs. DSNPs with controllable size (28-85 nm) and narrow size distributions can be obtained by using monodisperse silica nanoparticles with various sizes as seeds. The surface morphology of DSNPs is tunable by changing the concentration of TEOS. Additionally, novel dendritic silica nanochains are prepared using one-dimensionally assembled silica nanoparticles as the seeds.

本文言語English
ページ(範囲)1610-1614
ページ数5
ジャーナルLangmuir
31
5
DOI
出版ステータスPublished - 2015 2 10

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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