Template synthesis of precisely monodisperse silica nanoparticles within self-assembled organometallic spheres

Kosuke Suzuki, Sota Sato, Makoto Fujita

    Research output: Contribution to journalArticlepeer-review

    101 Citations (Scopus)

    Abstract

    One of the key challenges in materials science is to control the size and shape of inorganic nanoparticles with a high degree of precision, as these parameters have a significant influence on the nanoparticles' properties and potential applications. Here, we describe the preparation of highly monodisperse silica nanoparticles smaller than 5 nm in diameter by using self-assembled, hollow, spherical compounds as 'endo-templates. These coordination complexes with pendant sugar groups lining their interiors-assembled from 12 metal ions and 24 bis-pyridyl ligands containing glucose substituents-acted as structurally well-defined templates for the sol-gel condensation of alkoxysilanes. The polydispersities of the silica nanoparticles made with this method approached unity, with Mw/Mn < 1.01. The component ligands are modified easily, which enables an accurate expansion of the coordination complex and the subsequent control of the monodisperse silica nanoparticles that span molecular weights of 5,000 to 31,000 Da (corresponding to 2-4 nm in diameter). This method could be applicable to the preparation of other inorganic nanoparticles.

    Original languageEnglish
    Pages (from-to)25-29
    Number of pages5
    JournalNature Chemistry
    Volume2
    Issue number1
    DOIs
    Publication statusPublished - 2010 Jan 1

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)

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