Laser Processing of Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 1816

Special Issue Editors


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Guest Editor
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Interests: laser additive manufacturing; powder bed fusion; directed energy deposition; microstructure and performance
Special Issues, Collections and Topics in MDPI journals

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Guest Editor Assistant
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Interests: metal 3D printing; laser cladding

E-Mail Website
Guest Editor Assistant
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
Interests: metal 3D printing; laser cladding

Special Issue Information

Dear Colleagues,

Laser material processing technologies have gained considerable importance in diverse industries due to the rapid growth of laser applications and the reduced cost of laser systems. Among the applications of laser technology, in recent years, 3D printing and laser cladding have received significant attention in diverse industries; 3D printing can manufacture parts directly from a digital model using a layer-by-layer material build-up approach. This manufacturing method can prepare complex-shape metal parts in a short time, with high precision. Laser cladding is widely used in the preparation of composite coating; the method has some excellent characteristics, such as metallurgical bonding with the substrate, controllable coating thickness, and high processing efficiency, and is suitable for use with various metal materials. Laser cladding has become an effective method of material surface modification. The global metal 3D printing and laser cladding markets are mainly driven by the rapid development of the aerospace and automobile industries. 

In this Special Issue, we welcome articles that focus on metal 3D printing and laser cladding materials, in addition to processes and their influences on the final products’ microstructures and performances, in order to provide guidance for the development of metal 3D printing and laser cladding technologies.

Dr. Zhanyong Zhao
Guest Editor

Dr. Liqing Wang
Dr. Zhen Zhang
Guest Editor Assistants

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Keywords

  • metal 3D printing
  • laser cladding
  • laser processing
  • nanomaterials

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Published Papers (1 paper)

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Research

15 pages, 5456 KiB  
Article
Extremely High-Quality Periodic Structures on ITO Film Efficiently Fabricated by Femtosecond Pulse Train Output from a Frequency-Doubled Fabry–Perot Cavity
by Qilin Jiang, Yuchan Zhang, Yufeng Xu, Shian Zhang, Donghai Feng, Tianqing Jia, Zhenrong Sun and Jianrong Qiu
Nanomaterials 2023, 13(9), 1510; https://doi.org/10.3390/nano13091510 - 28 Apr 2023
Cited by 4 | Viewed by 1460
Abstract
This study developed a novel frequency-doubled Fabry–Perot cavity method based on a femtosecond laser of 1030 nm, 190 fs, 1 mJ, and 1 kHz. The time interval (60–1000 ps) and attenuation ratio (0.5–0.9) between adjacent sub-pulses of the 515 nm pulse train were [...] Read more.
This study developed a novel frequency-doubled Fabry–Perot cavity method based on a femtosecond laser of 1030 nm, 190 fs, 1 mJ, and 1 kHz. The time interval (60–1000 ps) and attenuation ratio (0.5–0.9) between adjacent sub-pulses of the 515 nm pulse train were able to be easily adjusted, while the efficiency was up to 50% and remained unchanged. Extremely high-quality low-spatial-frequency LIPSS (LSFL) was efficiently fabricated on an indium tin oxide (ITO) film using a pulse train with a time interval of 150 ps and attenuation ratio of 0.9 focused with a cylindrical lens. Compared with the LSFL induced by the primary Gaussian pulse, the uniformity of the LSFL period was enhanced from 481 ± 41 nm to 435 ± 8 nm, the divergence of structural orientation angle was reduced from 15.6° to 3.7°, and the depth was enhanced from 74.21 ± 14.35 nm to 150.6 ± 8.63 nm. The average line edge roughness and line height roughness were only 7.34 nm and 2.06 nm, respectively. The depths and roughness values were close to or exceeded those of resist lines made by the interference lithography. Compared with the common Fabry–Perot cavity, the laser energy efficiency of the pulse trains and manufacturing efficiency were enhanced by factors of 19 and 25. A very colorful “lotus” pattern with a size of 30×28 mm2 was demonstrated, which was covered with high-quality LSFLs fabricated by a pulse train with optimized laser parameters. Pulse trains can efficiently enhance and prolong the excitation of surface plasmon polaritons, inhibit deposition particles, depress ablation residual heat and thermal shock waves, and eliminate high-spatial-frequency LIPSS formed on LSFL, therefore, producing extremely high-quality LSFL on ITO films. Full article
(This article belongs to the Special Issue Laser Processing of Nanomaterials)
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