Work

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

Year: 2011

Type: article

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.

Source: Nanotechnology

DOI: 10.1088/0957-4484/22/37/375607

Authors: Yutaka Yoshida, Seiichi Watanabe, Yoshiaki Nishijima, Kosei Ueno, Hiroaki Misawa, Takahiko Kato

Institutions: Hokkaido University, Research Institute for Electronic Science, Hokkaido University, Hitachi (Japan)

Language: English

Topic: Laser Material Processing Techniques

Subfield: Industrial and Manufacturing Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Japan Society for the Promotion of Science

Awards: Development of non-contact lithography toward 10 nm-node, The development of plasmonic antennae realizing light harvesting/localization and its application to solar cells