Effect of fs/ps laser pulsewidth on ablation of metals and silicon in air and liquids, and on their nanoparticle yields

Сараева, И. Н.; Kudryashov, S. I.; Rudenko, A. A.; Zhilnikova, M. I.; Ivanov, Dmitry; Zayarny, D. A.; Simakin, A.V.; Ионин, А. А.; Garcia, Martín E.

doi:10.1016/j.apsusc.2018.11.199

Cited by 42 publications

(35 citation statements)

References 72 publications

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“…Damage for the first shot only starts in the central part and at macroscopic scratches of the surface. The pronounced ablation at scratches has been put in context of field enhancement as has been described recently . In contrast to LIPSS formation at femtosecond laser ablation,, we find no ordered (or lamellar) surface structuring.…”

Section: Resultssupporting

confidence: 64%

Incubation Effect of Pre‐Irradiation on Bubble Formation and Ablation in Laser Ablation in Liquids

et al. 2019

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Pulsed laser ablation in liquids (PLAL) is a multi‐scale process, which is widely studied either in batch ablation with prolonged target irradiation as well as mechanistic investigations, in a defined (single‐shot) process. However, fundamental studies on defined pulse series are rare. We have investigated the effect of a developing rough morphology of the target surface on the PLAL process with nanosecond pulses and, partially, picosecond pulses. At low fluence the cavitation bubble growth as well as the ablation yield depend on the irradiation history of the target. The bubble size increases with repeated irradiation on one spot for the first 2–30 pulses as well as with the applied dose. This is discussed within the framework of incubation effects. Incubation is found to be important, resulting in a bubble volume increase by a factor of six or more between pristine and corrugated targets. The target surface, changing from smooth to corrugated, induces a more efficient localization of laser energy at the solid‐liquid interface. This is accompanied by a suppressed reflectivity and more efficient coupling of energy into the laser‐induced plasma. Thus, the cavitation bubble size increases as well as ablation being enhanced. At high fluence, such incubation is masked by the rapid development of surface damage within the first shots, which eventually would lead to a reduction of bubble sizes.

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Section: Resultssupporting

confidence: 64%

Incubation Effect of Pre‐Irradiation on Bubble Formation and Ablation in Laser Ablation in Liquids

et al. 2019

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“…These results relate to the RSS observed after the single-shot ablation into vacuum. [39,40]) confirm the conclusion. Indeed, the previous observations (see Figure 8 in refs.…”

Section: Structure Of High-entropy Layer According To MDsupporting

confidence: 74%

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Petrov

Inogamov

Zhakhovsky

et al. 2019

Contributions to Plasma Physics

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Physical processes involved in laser ablation in liquid (LAL) are studied using a gold target irradiated through transparent water. During and after irradiation, the heated material from the surface of a target produces a plume that expands into liquid-forming nanoparticles (NPs). The LAL method of NP production is ecologically much cleaner than others. A better understanding of the processes associated with complicated hydrodynamic phenomena leading to LAL is important for controlled manufacturing. We consider laser pulses with different durations L covering fifth orders of magnitudes ranging from 0.1 ps to 0.5 ns and large absorbed fluences F abs near optical breakdown of liquid. It is shown that the trajectory of the contact boundary with liquid at the middle and late stages after passing the maximum intensity of the longest pulse is rather similar for very different pulse durations if energies F abs are comparable. We trace how hot (in a few eV range) dense gold plasma expands, cools down, intersects a saturation curve, and condenses into NPs appearing first inside the water-gold diffusively mixed intermediate layer where gold vapour has the lowest temperature. Later, the pressure around the gold-water contact drops down below the critical pressure for water. As a result, the nanoparticles find themselves in gaseous water bubble where density of water gradually decreases to 10 −4 − 10 −5 g/cm 3 at maximum bubble expansion. K E Y W O R D Slaser ablation in liquid, laser gold plasma, nanoparticles

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“…As it was shown experimentally [14,30,36], one can significantly suppress the smaller NPs distribution, Figure 1, or getting its input negligible as compared to the large distribution when going to the higher values of the incident fluencies. While, the theory suggested in [37] do not address such laser parameters manipulations, the explanation in terms of thermal vs. mechanical damage, given above, indicates clearly that for high fluencies, marked as high F in Figure 4, the generated electronic temperatures T e can result in a drastic scaling of conductivity function as k e~Te 5/2 .…”

Section: Simulation Results and Discussionmentioning

confidence: 67%

“…As an example, there is no common vision of mechanisms responsible for particular size properties of formed NPs. Here, bimodal size distributions of metal and other NPs (see an example in Figure 1) were typically reported under the use of radiation of different parameters [14,15,[30][31][32][33][34][35], but under certain experimental conditions only one NP population was recorded [14,30,36]. The difficulty for a simple interpretation of data is obviously due to a variety of parameters and processes involved in PLAL synthesis.…”

Section: Introductionmentioning

confidence: 88%

Numerical Investigation of Ultrashort Laser-Ablative Synthesis of Metal Nanoparticles in Liquids Using the Atomistic-Continuum Model

et al. 2019

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We present a framework based on the atomistic continuum model, combining the Molecular Dynamics (MD) and Two Temperature Model (TTM) approaches, to characterize the growth of metal nanoparticles (NPs) under ultrashort laser ablation from a solid target in water ambient. The model is capable of addressing the kinetics of fast non-equilibrium laser-induced phase transition processes at atomic resolution, while in continuum it accounts for the effect of free carriers, playing a determinant role during short laser pulse interaction processes with metals. The results of our simulations clarify possible mechanisms, which can be responsible for the observed experimental data, including the presence of two populations of NPs, having a small (5–15 nm) and larger (tens of nm) mean size. The formed NPs are of importance for a variety of applications in energy, catalysis and healthcare.

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Effect of fs/ps laser pulsewidth on ablation of metals and silicon in air and liquids, and on their nanoparticle yields

Cited by 42 publications

References 72 publications

Incubation Effect of Pre‐Irradiation on Bubble Formation and Ablation in Laser Ablation in Liquids

Incubation Effect of Pre‐Irradiation on Bubble Formation and Ablation in Laser Ablation in Liquids

Condensation of laser‐produced gold plasma during expansion and cooling in a water environment

Numerical Investigation of Ultrashort Laser-Ablative Synthesis of Metal Nanoparticles in Liquids Using the Atomistic-Continuum Model

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