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

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 ef...

Full description

Saved in:
Bibliographic Details
Published inNanotechnology Vol. 22; no. 37; pp. 375607 - 1-7
Main Authors Yoshida, Yutaka, Watanabe, Seiichi, Nishijima, Yoshiaki, Ueno, Kosei, Misawa, Hiroaki, Kato, Takahiko
Format Journal Article
LanguageEnglish
Published England IOP Publishing 16.09.2011
Subjects
Gold
Irradiation
Lasers
Nanocomposites
Nanomaterials
Nanostructure
Self assembly
Silicon
Online AccessGet full text

Cover

More Information
Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/22/37/375607