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

Yoshiyuki Kuroda, Kohta Fukumoto, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)10-17
    Number of pages8
    JournalApplied Clay Science
    Volume55
    DOIs
    Publication statusPublished - 2012 Jan

    Fingerprint

    imogolite
    Gold
    Nanotubes
    gold
    Nanoparticles
    Composite materials
    Color
    Coulomb interactions
    Catalyst supports
    transparency
    Transparency
    Electrostatics
    Porosity
    catalyst
    porosity
    nanoparticle
    nanotube
    material
    filter
    heating

    Keywords

    • Electrostatic assembly
    • Gold nanoparticles
    • Imogolite
    • Morphological control

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geology

    Cite this

    Uniform and high dispersion of gold nanoparticles on imogolite nanotubes and assembly into morphologically controlled materials. / Kuroda, Yoshiyuki; Fukumoto, Kohta; Kuroda, Kazuyuki.

    In: Applied Clay Science, Vol. 55, 01.2012, p. 10-17.

    Research output: Contribution to journalArticle

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