Special Issue "Laser Ablation: Materials and Applications"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: 31 December 2020.

Special Issue Editor

Dr. Nikša Krstulović
Website
Guest Editor
Institute of Physics, Zagreb, Croatia
Interests: laser-produced plasmas; low pressure and atmospheric nonthermal plasmas; plasma diagnostics and applications; laser synthesis of nanoparticles in liquids

Special Issue Information

Dear Colleagues,

Since the discovery of laser in 1960 by Theodore H. Maiman, many laser-based phenomena and techniques for advanced material synthesis and characterization have been built for a broad range of applications.

Laser ablation is a process of material removal via intense laser pulses, and it often leads to a formation of plasma plume above the target surface. Plasma plume carries information about the target stoichiometric composition for sample quantitative analysis, while such plasmas can be analyzed using laser-based and related optical techniques.

In this Special Issue, fundamental processes of laser ablation over a broad range of laser types are ecompassed together with new material fabrication and processing for the development of advanced photovoltaics, surfaces with added values, superconducting thin films, colloidal nanoparticles, and nano- or microarrays via micromachining. Special focus is on two distinctive techniques: laser-induced breakdown spectroscopy and related techniques for materials analysis and pulsed laser deposition for new materials fabrication.

It is my pleasure to invite you to submit a manuscript for this Special Issue—"Laser Ablation: Materials and Applications". Full original scientific papers, communications, and reviews are all welcome. Critical reviews in specific modern topics such as laser-induced breakdown quantitative spectroscopy, pulsed laser deposition, laser synthesis of nanoparticles in liquids, laser plasma-based extreme light sources, laser synthesis and processing of new materials, and laser-based techniques for analysis of laser plasmas are particularly welcome.

This Special Issue will provide recent trends in laser ablation processes and related applications in a broad range of new materials fabrication and analysis.

Dr. Nikša Krstulović
Guest Editor

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 papers will be 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 100 words) can be sent to the Editorial Office for announcement on this website.

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. Materials is an international peer-reviewed open access semimonthly 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 2000 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 ablation processes
  • laser produced plasmas
  • pulsed laser deposition
  • laser-induced breakdown spectroscopy
  • laser synthesis of nanoparticles
  • laser processing of materials
  • laser-based spectroscopies

Published Papers (4 papers)

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Research

Open AccessArticle
The Effect of Confinement Angle on Self-Colliding Aluminium Laser Plasmas Using Spectrally Resolved Fast Imaging
Materials 2020, 13(23), 5489; https://doi.org/10.3390/ma13235489 - 02 Dec 2020
Abstract
In this work we investigate the effect of the confinement angle on self-colliding aluminium laser produced plasmas. More specifically, we apply V-shaped channel targets of different angles (90°, 60° and 30°) and report both broadband and filtered time-resolved fast imaging measurements on the [...] Read more.
In this work we investigate the effect of the confinement angle on self-colliding aluminium laser produced plasmas. More specifically, we apply V-shaped channel targets of different angles (90°, 60° and 30°) and report both broadband and filtered time-resolved fast imaging measurements on the formation of such plasmas in ambient air. Based on the broadband measurements we suggest that the plasmas formed on the two inner walls of the V-shaped channel expand normally to the surface, interact with each other and possibly stagnate. The spectrally filtered fast imaging reveals the presence of a spatial distribution of different species within the plasmas and signatures of forced recombination. Full article
(This article belongs to the Special Issue Laser Ablation: Materials and Applications)
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Open AccessArticle
Photodegradation of Methylene Blue and Rhodamine B Using Laser-Synthesized ZnO Nanoparticles
Materials 2020, 13(19), 4357; https://doi.org/10.3390/ma13194357 - 30 Sep 2020
Abstract
In this paper we examined the photocatalytic efficiency of a laser-synthesized colloidal solution of ZnO nanoparticles synthesized by laser ablation in water. The average size of the obtained colloidal ZnO nanoparticles is about 47 nm. As revealed by electron microscopy, other nanostructures were [...] Read more.
In this paper we examined the photocatalytic efficiency of a laser-synthesized colloidal solution of ZnO nanoparticles synthesized by laser ablation in water. The average size of the obtained colloidal ZnO nanoparticles is about 47 nm. As revealed by electron microscopy, other nanostructures were also present in the colloidal solution, especially nanosheets. A photocatalytic degradation of UV-irradiated Methylene Blue and Rhodamine B solutions of different concentration in the presence of different ZnO catalyst mass concentrations was studied in order to examine their influence on photodegradation rates. ZnO nanoparticles have shown high photocatalytic efficiency, which is limited due to different effects related to UV light transmittivity through the colloidal solution. Therefore, increasing catalyst concentration is effective way to increase photocatalytic efficiency up to some value where photodegradation rate saturation occurs. The photodegradation rate increases as the dye concentration decreases. These findings are important for water purification applications of laser-synthesized ZnO nanoparticles. Full article
(This article belongs to the Special Issue Laser Ablation: Materials and Applications)
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Open AccessArticle
Laser-Assisted Synthesis of Composite Nanoparticles of Perovskite BaTiO3 in Aqueous Solutions and Their Optical Properties
Materials 2020, 13(18), 4086; https://doi.org/10.3390/ma13184086 - 14 Sep 2020
Abstract
Experimental results are presented on laser-assisted synthesis of composite nanoparticles of perovskite BaTiO3 with gold nanoparticles using the technique of laser ablation in water and aqueous solution of hydrogen peroxide. Nanoparticles of BaTiO3 are generated by near IR laser radiation with [...] Read more.
Experimental results are presented on laser-assisted synthesis of composite nanoparticles of perovskite BaTiO3 with gold nanoparticles using the technique of laser ablation in water and aqueous solution of hydrogen peroxide. Nanoparticles of BaTiO3 are generated by near IR laser radiation with pulse durations of 170 fs, 1 ps, and 200 ns. Nanoparticles of barium titanate BaTiO3 (BTO) have tetragonal structure for all used pulse durations. Two ways of synthesis are tested. In the first one a gold target is ablated in the colloidal solution of BaTiO3 nanoparticles. The second way consists of laser exposure of the mixture of colloidal solutions of nanoparticles of BaTiO3 and Au. Synthesized composite nanoparticles are characterized by optical spectroscopy, Raman spectroscopy, X-Ray diffractometry, and Transmission Electron Microscopy. Composite BaTiO3‑Au nanoparticles have the absorption band in the visible range of spectrum and demonstrate plasmonic luminescence. Full article
(This article belongs to the Special Issue Laser Ablation: Materials and Applications)
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Open AccessArticle
Bacteria Exposed to Silver Nanoparticles Synthesized by Laser Ablation in Water: Modelling E. coli Growth and Inactivation
Materials 2020, 13(3), 653; https://doi.org/10.3390/ma13030653 - 01 Feb 2020
Cited by 1
Abstract
This study is aimed to better understand the bactericidal mode of action of silver nanoparticles. Here we present the production and characterization of laser-synthesized silver nanoparticles along with growth curves of bacteria treated at sub-minimal and minimal inhibitory concentrations, obtained by optical density [...] Read more.
This study is aimed to better understand the bactericidal mode of action of silver nanoparticles. Here we present the production and characterization of laser-synthesized silver nanoparticles along with growth curves of bacteria treated at sub-minimal and minimal inhibitory concentrations, obtained by optical density measurements. The main effect of the treatment is the increase of the bacterial apparent lag time, which is very well described by the novel growth model as well as the entire growth curves for different concentrations. The main assumption of the model is that the treated bacteria uptake the nanoparticles and inactivate, which results in the decrease of both the nanoparticles and the bacteria concentrations. The lag assumes infinitive value for the minimal inhibitory concentration treatment. This apparent lag phase is not postponed bacterial growth. It is a dynamic state in which the bacterial growth and death rates are close in value. Our results strongly suggest that the predominant mode of antibacterial action of silver nanoparticles is the penetration inside the membrane. Full article
(This article belongs to the Special Issue Laser Ablation: Materials and Applications)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Laser synthesis of composite nanoparticles of perovskite BaTiO3 with Au by laser ablation in aqueous solutions

B.A. Mukhametyanov1,2, M.I. Zhilnikova1,2, E.V. Barmina1, O.V. Uvarov1, Yu.L. Kalachev1, E. Stratakis3, E. Skoulas3, and G.A. Shafeev1,4,*

1 Prokhorov General Physics Institute of the Russian Academy of Sciences, 38, Vavilov street, 119991 Moscow, Russian Federation

2 The Federal State Educational Institution of Higher Professional Education “Moscow Institute of Physics and Technology (National Research University)”, 9, Institutsky lane, 141700, Dolgoprudny, Moscow region, Russian Federation

3 Institute of electronic structure and lasers, FORTH, Irakleon, Greece

4 National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31, Kashirskoye highway, 115409, Moscow, Russian Federation

Abstract: Laser synthesis of composite nanoparticles of perovskite BaTiO3 with gold nanoparticles is experimentally studied using the technique of laser ablation in water and aqueous solutions. Two approaches are applied for synthesis. In the first one a bulk Au target was ablated in the colloidal solution of perovskite nanoparticles generated by laser ablation of BaTiO3 target in water by either 1 ps or 200 ns laser pulses of infrared lasers.  The second approach consisted in laser exposure of the mixture of colloidal solutions of nanoparticles of BaTiO3 and Au. Synthesized composite nanoparticles are characterized by optical spectroscopy, Raman spectroscopy, and transmission electron microscopy. Composite BaTiO3-Au nanoparticles have the absorption band in the visible range of spectrum due to plasmon resonance of Au component.

2. another 3 planned feature papers by Professor John Costello (Dublin City University, Dublin, Ireland), Processor Ion Mihailescu (National Institute for Laser, Plasma and Radiation Physics, Bucharest, Romania), and Professor Gerard O'Sullivan (University College Dublin, Dublin, Ireland)

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