Single-shot nanosecond laser ablation of Ni in low and high viscosity liquids at different temperatures

Ando, Kazuya; Feng, Nan; Nakajima, Takashi

doi:10.1016/j.apsusc.2022.153361

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…In the literature about the physical–chemistry of the LAL processes, the features in G1–G4 have been used for the quantitative description of laser beam propagation in the liquid, , laser interaction with the target or the plasma plume , (after ca. 1 ns, the laser pulse overlaps with the plasma plume), presence of compounds from the solution (solvent and solutes) in the plasma and in the cavitation bubble, ,,, chemical reactivity of solution species with target species, atmospheric oxygen or plasma electrons, ,,,, and the physics of the cavitation bubble. ,, …”

Section: Resultsmentioning

confidence: 99%

Data-Driven Predetermination of Cu Oxidation State in Copper Nanoparticles: Application to the Synthesis by Laser Ablation in Liquid

Miao,

Bissoli,

Basagni

et al. 2023

J. Am. Chem. Soc.

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Copper-based nanocrystals are reference nanomaterials for integration into emerging green technologies, with laser ablation in liquid (LAL) being a remarkable technique for their synthesis. However, the achievement of a specific type of nanocrystal, among the whole library of nanomaterials available using LAL, has been until now an empirical endeavor based on changing synthesis parameters and characterizing the products. Here, we started from the bibliographic analysis of LAL synthesis of Cu-based nanocrystals to identify the relevant physical and chemical features for the predetermination of copper oxidation state. First, single features and their combinations were screened by linear regression analysis, also using a genetic algorithm, to find the best correlation with experimental output and identify the equation giving the best prediction of the LAL results. Then, machine learning (ML) models were exploited to unravel cross-correlations between features that are hidden in the linear regression analysis. Although the LAL-generated Cu nanocrystals may be present in a range of oxidation states, from metallic copper to cuprous oxide (Cu2O) and cupric oxide (CuO), in addition to the formation of other materials such as Cu2S and CuCN, ML was able to guide the experiments toward the maximization of the compounds in the greatest demand for integration in sustainable processes. This approach is of general applicability to other nanomaterials and can help understand the origin of the chemical pathways of nanocrystals generated by LAL, providing a rational guideline for the conscious predetermination of laser-synthesis parameters toward the desired compounds.

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Section: Resultsmentioning

confidence: 99%

Data-Driven Predetermination of Cu Oxidation State in Copper Nanoparticles: Application to the Synthesis by Laser Ablation in Liquid

Miao,

Bissoli,

Basagni

et al. 2023

J. Am. Chem. Soc.

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“…This indicates a much higher laser ablation rate underwater, which agrees well with the work of Sakka et al 18 and relevant work in laser material micro-processing. 40,41 This phenomenon can be attributed to the much stronger connement effect of water that leads to much higher pressure and density for the underwater plasma. The higher plasma pressure on the target surface signicantly enhances the laser ablation efficiency in water.…”

Section: Discussion Of the Plasma Growth Mechanisms In Water And In Airmentioning

confidence: 99%

Characteristics of laser-induced plasma generated in water and in air with different nanosecond laser pulse durations

Zhai,

Tian,

Wang

et al. 2024

J. Anal. At. Spectrom.

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“…Precision machining methods for SiC ceramic microstructures mainly include mechanical machining [5,6], micro electric discharge [7], and wet etching technology [8]. However, there exists lots of unacceptable disadvantages on the fabricating of ceramic workpieces into functional microstructures by conventional machining techniques, mainly including severe tool wear, subsurface damage, low material removal rates, insu cient machining quality and so on [9,10].…”

Section: Introductionmentioning

confidence: 99%

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

Han,

Tong,

et al. 2024

Preprint

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The difficult-to-cut characteristics of silicon carbide (SiC) ceramic has limited its processing quality and forming process of functional surfaces. Comparing to direct laser machining (DLM), waterjet-assisted laser micromachining (WJALM) is an alternative technique for SiC ceramic that is capable of reducing thermal-induced damages. In this paper, high-aspect-ratio (HAR) microchannels are fabricated on silicon carbide ceramic by WJALM, and its effectiveness is verified through comparative experiments with DLM. The effects of parametric combination of waterjet and laser parameters on machining responses of geometric structural features and sidewall surface quality are investigated by controlled variable experiments. Results revealed that HAR microchannels with almost no recast layers could be obtained when SiC workpiece was fabricated by a nanosecond laser under the flowing water medium layer. And higher average laser power of 27W, lower scanning speed of 600m/s and medium waterjet velocity of 12/16m/s contributed to larger aspect ratio, more ablation area and superior sidewall quality of HAR microchannels.

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Single-shot nanosecond laser ablation of Ni in low and high viscosity liquids at different temperatures

Cited by 6 publications

References 45 publications

Data-Driven Predetermination of Cu Oxidation State in Copper Nanoparticles: Application to the Synthesis by Laser Ablation in Liquid

Data-Driven Predetermination of Cu Oxidation State in Copper Nanoparticles: Application to the Synthesis by Laser Ablation in Liquid

Characteristics of laser-induced plasma generated in water and in air with different nanosecond laser pulse durations

Investigation on high-aspect-ratio silicon carbide ceramic microchannel by using waterjet-assisted laser micromachining

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