Mechanism of elongation of gold or silver nanoparticles in silica by irradiation with swift heavy ions

Koichi Awazu*, Xiamin Wang, Makoto Fujimaki, Junji Tominaga, Shinji Fujii, Hirohiko Aiba, Yoshimichi Ohki, Tetsuro Komatsubara

*この研究の対応する著者

研究成果: Article査読

15 被引用数 (Scopus)

抄録

It has been reported that elongated Au nanoparticles oriented parallel to one another can be synthesized in SiO2 by ion irradiation. Our aim was to elucidate the mechanism of this elongation. We prepared Au and Ag nanoparticles with a diameter of 20 nm in an SiO2 matrix. It was found that Au nanoparticles showed greater elongated with a higher flux of ion beam and with thicker SiO2 films. In contrast, Ag nanoparticles split into two or more shorter nanorods aligned end to end in the direction parallel to the ion beam. These experimental results are discussed in the framework of a thermal spike model of Au and Ag nanorods embedded in SiO2. The lattice temperature exceeds the melting temperatures of SiO2, Au and Ag for 100 ns after one 110 MeV Br10+ ion has passed through the middle of an Au or Ag nanorod. Crown

本文言語English
ページ(範囲)941-943
ページ数3
ジャーナルNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
267
6
DOI
出版ステータスPublished - 2009 3月

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学

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