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

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:267

Article; Proceedings Paper

Awazu, Koichi¹  Wang, Xiamin¹  Fujimaki, Makoto¹  Tominaga, Junji¹  Fujii, Shinji²  Aiba, Hirohiko²  Ohki, Yoshimichi²  Komatsubara, Tetsuro³ 

[1] Natl Inst Adv Ind Sci & Technol, CAN FOR, Tsukuba, Ibaraki 3058562, Japan

[2] Waseda Univ, Shinjuku Ku, Tokyo 1698555, Japan

[3] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan

关键词: Swift heavy ion;    Nanofabrication;    An nanoparticles;    Silica glass;   

DOI  :  10.1016/j.nimb.2009.02.027

来源: Elsevier

【 摘 要 】

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 OF 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 Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

【 授权许可】

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