Uniform and high dispersion of gold nanoparticles on imogolite nanotubes and assembly into morphologically controlled materials

Yoshiyuki Kuroda, Kohta Fukumoto, Kazuyuki Kuroda*

*この研究の対応する著者

研究成果査読

16 被引用数 (Scopus)

抄録

Morphologically controlled materials consisting of imogolite nanotubes and gold nanoparticles were prepared by electrostatic assembly. The composites consisting of imogolite nanotubes and gold nanoparticles (ca. 2 or 3. nm) were highly dispersed in water and they were subsequently used as building blocks of morphologically controlled materials. The formation of the composites was based on the electrostatic interactions between the surface carboxylato groups of gold nanoparticles and positively charged imogolite nanotubes. The composites were assembled to form free-standing films by filtration and into hollow spheres by the colloidal templating technique accompanied with the layer-by-layer technique. The free-standing films showed intense colors due to the gold nanoparticles, which makes the films useful as color filters. Hollow spheres were found to be useful as catalyst supports, because most of the gold nanoparticles retained their size as ca. 3. nm even after the heating at 500. °C. Imogolite nanotubes enabled facile morphological control of functionalized materials and are useful because of their transparency, stability, and high porosity.

本文言語English
ページ(範囲)10-17
ページ数8
ジャーナルApplied Clay Science
55
DOI
出版ステータスPublished - 2012 1

ASJC Scopus subject areas

  • 地質学
  • 地球化学および岩石学

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