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Plasmonic surface nanostructuring of Au-dots@SiO2 via laser-irradiation induced dewetting

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Title: Plasmonic surface nanostructuring of Au-dots@SiO2 via laser-irradiation induced dewetting
Authors: Yu, Ruixuan Browse this author
Shibayama, Tamaki Browse this author →KAKEN DB
Ishioka, Junya Browse this author
Meng, Xuan Browse this author
Lei, Yanhua Browse this author
Watanabe, Seiichi Browse this author →KAKEN DB
Keywords: in situ observation
nano particles
self assembly
localized surface plasmon resonance
Issue Date: 9-Jun-2017
Publisher: IOP Publishing
Journal Title: Nanotechnology
Volume: 28
Issue: 27
Publisher DOI: 10.1088/1361-6528/aa74f7
PMID: 28541250
Abstract: The in situ observation of Au dot formation and the self-assembly dynamics of Au nanoparticles (NPs) was successfully demonstrated via dewetting of Au thin films on SiO2 glass substrates under nano-second pulsed laser irradiation using a multi-quantum beam high-voltage electron microscope. Moreover, using electron energy-loss spectroscopy (EELS) performed in a scanning transmission electron microscope (STEM), the plasmonic properties of the formed Au/SiO2 nanostructure were analyzed to demonstrate its validity in advanced optical devices. The uniformly distributed Au NPs evolved into a dot alignment through movement and coalescence processes was demonstrated in this in situ observation. We carried out the plasmon-loss images of the plan view and the cross-section of the Au/SiO2 nanostructures were obtained at the plasmon-loss peak energy for investigate the three-dimensional distribution of surface plasmon. Furthermore, discrete-dipole approximation (DDA) calculations were used to simulate the plasmonic properties, such as the surface plasmon resonance and the surface plasmon field distribution, of isolated single Au/SiO2 nanostructures. This STEM-EELS-acquired surface plasmon map of the cross-sectional sample is in excellent agreement with the DDA calculations. This results demonstrated the influence of the contact condition between Au NP and SiO2 glass on the plasmonic properties, and may improve the technology for developing advanced optical devices.
Rights: This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at
Type: article (author version)
Appears in Collections:エネルギー・マテリアル融合領域研究センター (Center for Advanced Research of Energy and Material) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柴山 環樹

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