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Fabrication of a Au/Si nanocomposite structure by nanosecond pulsed laser irradiation.

Authors
  • Yoshida, Yutaka
  • Watanabe, Seiichi
  • Nishijima, Yoshiaki
  • Ueno, Kosei
  • Misawa, Hiroaki
  • Kato, Takahiko
Type
Published Article
Journal
Nanotechnology
Publisher
IOP Publishing
Publication Date
Sep 16, 2011
Volume
22
Issue
37
Pages
375607–375607
Identifiers
DOI: 10.1088/0957-4484/22/37/375607
PMID: 21860081
Source
Medline
License
Unknown

Abstract

A gold/silicon nanocomposite structure (NCS) was formed on a Si(100) surface by nanosecond pulsed laser irradiation. The Au/Si NCS contained both Au nanoparticles (NPs) and Au-Si alloy layers. We report that the use of laser irradiation to form Au NPs comprises two competing processes: a top-down effect involving decomposition into smaller NPs and a bottom-up effect involving self-assembly or self-organization into larger NPs. The formation of the periodic structure involved self-organization, i.e., the bottom-up effect, and was observed in situ using a pulsed-laser-equipped high-voltage electron microscope. The NCS formed by laser irradiation can be controlled by adjusting the laser energy density and the number of laser pulses.

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