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Title: Rapid in situ synthesis of polymer-metal nanocomposite films in several seconds using a CO₂ laser
Authors: Kashihara, Kazuhiko
Uto, Yuki
Nakajima, Takashi
Author's alias: 中嶋, 隆
Keywords: Nanocomposite Films
Longer Irradiation Times
Large-area Synthesis
Long-wavelength Side
Film Temperature
Issue Date: 3-Oct-2018
Publisher: Nature Publishing Group
Journal title: Scientific Reports
Volume: 8
Thesis number: 14719
Abstract: We demonstrate the rapid in situ synthesis of polymer-metal nanocomposite films using a CO₂ laser at 10.6 μm. The mechanism of our method is that the precursor of the metal nanoparticles, i.e., the metallic ions, is very rapidly reduced in the laser-heated polymer matrix without any reducing agent. Unlike other known laser-induced reduction methods using UV lasers, which produce radicals to promote reduction, the CO₂ laser energy is mainly absorbed by the glass substrate, and the laser-heated substrate heats the polymer matrix through heat diffusion to promote reduction. The superiority of the use of CO₂ lasers over nanosecond visible~UV lasers is also demonstrated in terms of the damage to the film. The developed method can be a new alternative to quickly synthesize a variety of polymer-metal nanocomposite films.
Rights: © The Author(s) 2018 This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
DOI(Published Version): 10.1038/s41598-018-33006-9
PubMed ID: 30283053
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