Soft-chemical approach of noble metal nanowires templated from mesoporous silica (SBA-15) through vapor infiltration of a reducing agent

Azusa Takai, Yoji Doi, Yusuke Yamauchi, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    53 Citations (Scopus)

    Abstract

    Noble metal (Pt, Ag, and Au) nanowires are synthesized by using mesoporous silica (SBA-15) powders as templates through vapor infiltration of a reducing agent (dimethylamine borane, DMAB) under the same reduction conditions. Because SBA-15 has micropores connecting mesochannels, Pt nanowires are connected and periodically packed, reflecting the micropores and the mesochannel arrangements in the original mesoporous silica. On the other hand, other metal (Ag and Au) nanowires are mainly unconnected. Such a difference is attributed to the relatively faster deposition rate of Ag and Au than Pt. Therefore, Ag and Au tend to grow rapidly along the mesochannels, and the metal deposition in micropores is insufficient to occur. The length of the metal nanowires is controlled by the reduction time. As a typical case, the surface plasmon resonance spectra of the Au nanowires embedded in SBA-15 change depending on the length of the nanowires. The present reduction is a soft-chemical, straightforward, and general approach, which has advantages for the synthesis of metal nanowires in large amounts.

    Original languageEnglish
    Pages (from-to)7586-7593
    Number of pages8
    JournalJournal of Physical Chemistry C
    Volume114
    Issue number17
    DOIs
    Publication statusPublished - 2010 May 6

    Fingerprint

    Reducing Agents
    Reducing agents
    infiltration
    Precious metals
    noble metals
    Infiltration
    Silicon Dioxide
    Nanowires
    nanowires
    Vapors
    Silica
    vapors
    silicon dioxide
    Metals
    metals
    Boranes
    boranes
    Surface plasmon resonance
    SBA-15
    Deposition rates

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Electronic, Optical and Magnetic Materials
    • Surfaces, Coatings and Films
    • Energy(all)

    Cite this

    Soft-chemical approach of noble metal nanowires templated from mesoporous silica (SBA-15) through vapor infiltration of a reducing agent. / Takai, Azusa; Doi, Yoji; Yamauchi, Yusuke; Kuroda, Kazuyuki.

    In: Journal of Physical Chemistry C, Vol. 114, No. 17, 06.05.2010, p. 7586-7593.

    Research output: Contribution to journalArticle

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    AU - Kuroda, Kazuyuki

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