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Appl. Sci. 2019, 9(3), 363; https://doi.org/10.3390/app9030363

Femtosecond Pulse Laser Near-Field Ablation of Ag Nanorods

Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
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Author to whom correspondence should be addressed.
Received: 4 January 2019 / Accepted: 18 January 2019 / Published: 22 January 2019
(This article belongs to the Special Issue Selected Papers from the NMJ2018)
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Abstract

Ag nanorods (Ag NRs) with a mean aspect ratio of 3.9 were prepared through a wet-chemical method, and the absorption spectra for various aspect ratios were obtained. The morphology transformation of Ag NRs irradiated with a femtosecond pulse laser was investigated through transmission electron microscopy (TEM). The near-field ablation was dependent on the laser polarization and wavelength. Laser-induced high electric field intensity was observed at the ends, middle, and junctions of the Ag NRs under various ablation conditions. Through simulation, the evolution mechanism was analyzed in detail. The effect of laser polarization angle on plasmonic junction welding was also investigated. By controlling the electronic field distribution, several nanostructures were obtained: bone-shaped NRs, T-shaped NRs, dimers, trimers, curved NRs, and nanodots. This study suggests a potentially useful approach for the reshaping, cutting, and welding of nanostructures. View Full-Text
Keywords: Ag nanorods; femtosecond pulse laser; near-field ablation; polarization Ag nanorods; femtosecond pulse laser; near-field ablation; polarization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhu, D.; Yan, J. Femtosecond Pulse Laser Near-Field Ablation of Ag Nanorods. Appl. Sci. 2019, 9, 363.

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