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

*この研究の対応する著者

研究成果: Article査読

66 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)7586-7593
ページ数8
ジャーナルJournal of Physical Chemistry C
114
17
DOI
出版ステータスPublished - 2010 5月 6

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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