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Micromachines
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Laser-Assisted Ultra-Precision Machining
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Laser-Assisted Ultra-Precision Machining

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D：Materials and Processing".

Deadline for manuscript submissions: 25 September 2026 | Viewed by 1300

Special Issue Editors

Dr. Juan Ignacio Ahuir-Torres

E-Mail Website
Guest Editor
School of Engineering, Liverpool John Moores University, Liverpool L3 5AH, UK
Interests: corrosion; electrochemistry; additive manufacturing; laser processing; tribocorrosion; tribology
Special Issues, Collections and Topics in MDPI journals
Dr. Hiren R. Kotadia

E-Mail Website
Guest Editor
School of Engineering, Faculty of Engineering and Technology, Liverpool John Moores University, Liverpool L3 3AF, UK
Interests: aluminium alloys; microstructure; laser welding; metal additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue, entitled “Laser-Assisted Ultra-Precision Machining”, aims to present the latest advances regarding laser-based micro- and nano-machining techniques, as well as their impact on the surface and bulk properties of a wide range of materials, including metals, ceramics, organic polymers, and composites. Contributions are particularly encouraged that explore the effect of laser processing on the chemical (e.g., corrosion resistance, wettability, and adhesion) and physical (e.g., hardness, mechanical properties, wear, and friction resistance) properties of the material. In addition to these topics, studies investigating the effect of laser assistance on the electrical properties of the materials are also welcome. Additionally, manuscripts focusing on laser hybrid machining processes, where the laser is employed in conjunction with other advanced technologies, are considered relevant and appropriate for this Special Issue.

The scope of this Special Issue includes, but it is not limited to, the following topics:

laser polishing; laser dressing; laser surface texturing; laser shot peening; laser cutting; abrasive jet polishing assisted by lasers; electrochemical discharge machining assisted by lasers; water jet machining assisted by lasers.

Dr. Juan Ignacio Ahuir-Torres
Dr. Hiren R. Kotadia
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • laser assistant
  • laser polishing
  • laser cutting
  • laser surface texturing
  • laser processing

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Published Papers (2 papers)

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17 pages, 7046 KB  
Article
Novel Design in Venturi-Type Nozzle by Selective Laser Melting for Enhancement in Microbubble Generation
by Minhoo Chung and Changkyoo Park
Micromachines 2026, 17(5), 547; https://doi.org/10.3390/mi17050547 - 29 Apr 2026
Viewed by 2
Abstract
This study applies selective laser melting (SLM) to fabricate stainless steel 316L (SS316L) structures on the distribution plate of a Venturi-type nozzle in a pressurized dissolution microbubble generator. SLM is employed because the fabricated structures are approximately hundreds of micrometers in size, making [...] Read more.
This study applies selective laser melting (SLM) to fabricate stainless steel 316L (SS316L) structures on the distribution plate of a Venturi-type nozzle in a pressurized dissolution microbubble generator. SLM is employed because the fabricated structures are approximately hundreds of micrometers in size, making them difficult to produce using conventional milling or other machining methods. These structures are designed to enhance cavitation and gas–liquid interaction, thereby enhancing microbubble generation. Various conditions of the SLM process are conducted, and the combination of 140 W laser power, 100 mm/s scan speed, 30 µm layer thickness, and 120 µm hatch distance achieves the highest relative density while maintaining the austenite phase of SS316L, thus being selected as the optimal SLM process parameters. Microbubble generation test are conducted under three different dissolution tank pressure conditions (0.20, 0.25, and 0.30 MPa) using nozzles with and without the SLM structures. The generated microbubbles in both nozzles ranges from 1 to 110 µm, satisfying the size conditions for microbubbles. The average microbubble size is smaller in the SLM-assisted nozzle (31.8 µm) compared with the plain nozzle (38.8 µm). Furthermore, under the dissolution tank pressure of 0.30 MPa for 30 s, the SLM-assisted nozzle generates a maximum of 52,368 microbubbles, representing approximately a 102.1% increase compared with the plain nozzle (25,907 microbubbles). These results demonstrate that incorporating SLM structures to Venturi-type nozzle effectively enhances microbubble generation, offering promising potential for applications in water treatment, biomedical processes, and chemical engineering. Full article
(This article belongs to the Special Issue Laser-Assisted Ultra-Precision Machining)
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20 pages, 1534 KB  
Article
Low-Cost DLW Setup for Fabrication of Photonics-Integrated Circuits
by André Moreira, Alessandro Fantoni, Miguel Fernandes and Jorge Fidalgo
Micromachines 2026, 17(1), 125; https://doi.org/10.3390/mi17010125 - 19 Jan 2026
Viewed by 825
Abstract
The development of photonic-integrated circuits (PICs) for data communication, sensing, and quantum computing is hindered by the high complexity and cost of traditional fabrication methods, which rely on expensive equipment, limiting accessibility for research and prototyping. This study introduces a Direct Laser Writing [...] Read more.
The development of photonic-integrated circuits (PICs) for data communication, sensing, and quantum computing is hindered by the high complexity and cost of traditional fabrication methods, which rely on expensive equipment, limiting accessibility for research and prototyping. This study introduces a Direct Laser Writing (DLW) system designed as a low-cost alternative, utilizing an XY platform for precise substrate movement and an optical system comprising a collimator and lens to focus the laser beam. Operating on a single layer, the system employs SU-8 photoresist to fabricate polymer-based structures on substrates such as ITO-covered glass. Preparation involves thorough cleaning, spin coating with photoresist, and pre- and post-baking to ensure material stability. This approach reduces dependence on costly infrastructure, making it suitable for academic settings and enabling rapid prototyping. A user interface and custom slicer process standard .dxf files into executable commands, enhancing operational flexibility. Experimental results demonstrate a resolution of 10 µm, with successful patterning of structures, including diffraction grids, waveguides, and multimode interference devices. This system aims to transform PIC prototype fabrication into a cost-effective, accessible process. Full article
(This article belongs to the Special Issue Laser-Assisted Ultra-Precision Machining)
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