In situ optical and electrical analysis of transient plasmas generated by ns-laser ablation for Ag nanostructured film production

Irimiciuc, Ștefan Andrei; Chertopalov, Sergii; Bulı́ř, J.; Fekete, Ladislav; Vondráček, Martin; Novotný, Michal; Crăciun, V.; Lančok, J.

doi:10.1016/j.vacuum.2021.110528

Cited by 12 publications

(6 citation statements)

References 51 publications

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“…Bi plasma is characterized by a narrow range of velocities of the ion structures (1st structure—21 km/s, 2nd structure—8 km/s, 3rd structure—1.5 km/s) and a dominant peak around 1–2 km/s which, according to the work of [ 4 , 34 , 35 ] can be correlated with a nanoparticle (NP) dominated structure. We have confirmed the nature of this slow structure in a recent paper [ 24 ] where we investigated the deposition of Ag nanoparticles by PLD. The widest distribution with ions having velocities up to 60 km/s is the Co plasma defined by low atomic mass particles which can gain more kinetic energy during the acceleration in the initial stages of ablation.…”

Section: Resultssupporting

confidence: 79%

“…The authors concluded that the low atomic mass elements have a wider angular distribution, results confirmed in [ 17 ] when the ablation of a complex multi-element target was investigated. In recent years Anoop et al [ 18 , 19 , 20 ] and our group [ 21 , 22 , 23 , 24 , 25 , 26 ] used extensive diagnostic investigations on metallic plasma and revealed clear dependence of some plasma parameters on the melting point, atomic mass, or electrical conductivity of the material. The reports are general and cover several irradiation regimes (fs, ps, ns) and a wide range of materials (Al, Cu, Mn, Ni, In, Te, W, Zn, Ti).…”

Section: Introductionmentioning

confidence: 99%

“…A significant part of available results on the target-plasma relation is given through the implementation of the Langmuir probe method in its time-resolved [ 24 ] or collector [ 27 ] versions. We recently showed that for the case of pulsed laser deposition (PLD) in specific conditions the information extracted from the saturation current of the probe can be limited without the implementation of complementary, usually more expensive techniques (high resolution optical emission spectroscopy, mass spectrometry, etc.).…”

Section: Introductionmentioning

confidence: 99%

“…We recently showed that for the case of pulsed laser deposition (PLD) in specific conditions the information extracted from the saturation current of the probe can be limited without the implementation of complementary, usually more expensive techniques (high resolution optical emission spectroscopy, mass spectrometry, etc.). In [ 24 , 25 , 28 ] we proposed the time and angle-resolved analysis of unbiased Langmuir Probe (LP) as an alternative to the usual approach, which has the advantage of offering more precise information relating to the internal structure of the ionic current, which is not possible in the saturation regime and gives the possibility to study both positive and negative charges from the ablated plasma. Recently, the method was shown to be sensitive to Ag oxidation processes in the plasma volume for pressure as low as 0.5 Pa.…”

Section: Introductionmentioning

confidence: 99%

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On the Dynamics of Transient Plasmas Generated by Nanosecond Laser Ablation of Several Metals

et al. 2021

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The dynamics of transient plasma generated by UV ns-laser ablation of selected metals (Co, Cu, Ag, Bi) were investigated by the Langmuir Probe method in angle- and time-resolved modes. Multiple ionic and electronic structures were seen for all plasmas with some corresponding to anions or nanoparticle-dominated structures. The addition of an Ar atmosphere energetically confined the plasma and increased the charge density by several orders of magnitude. For pressure ranges exceeding 0.5 Pa fast ions were generated in the plasma as a result of Ar ionization and acceleration in the double layer defining the front of the plasma plume. Several correlations between the target nature plasma properties were attempted. The individual plasma structure expansion velocity increases with the melting point and decreases with the atomic mass while the corresponding charged particle densities decrease with the melting point, evidencing the relationship between the volatility of the sample and the overall abated mass.

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Section: Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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On the Dynamics of Transient Plasmas Generated by Nanosecond Laser Ablation of Several Metals

et al. 2021

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“…The three-parametric dependence will also be reflected in the expansion velocities of the plasma. As reported by our group in [31][32][33][34], the inner structure of the plasma can have a complex of two or more substructures which forms during expansion. Comparing the geometries of the two plasmas during the deposition process, we observ that the C1 plasma has a more elongated shape reaching the substrate (visible emission contribution to the understanding of the plasma volume) after 500 ns, whereas C2 takes approximately 1 µs having a more compact shape in the first stage of expansion.…”

Section: Real-time Monitoring During Pld Of Ceramic Protective Layermentioning

confidence: 65%

On the Deposition Process of Ceramic Layer Thin Films for Low-Carbon Steel Pipe Protection

et al. 2022

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Ceramic thin films with variable thicknesses have been used in many applications. In order to protect the petroleum transportation pipes against the harmful H2S action, two ceramic materials as thin layers are proposed. In this article, pulsed laser deposition (PLD) of ceramic layers by in situ time-resolved optical techniques is investigated. Two ceramic materials were used as targets and real-time monitoring of the PLD process was realized via ICCD fast camera imaging and optical emission spectroscopy. The space–time displacement of the ceramic emissions was analyzed in order to determine the plasma structure and respective kinetic energies. Spectral-resolved investigation allowed the determination of plasma species individual velocities (in the first case: 43 km/s for C ionic species, 11 km/s for Si, from 25 to 5 km/s for atomic species; in the second case: 32 km/s for C ionic species, 11 km/s for W species, and 15 and 53 km/s for neutral species). SEM and AFM techniques were implemented to analyze the resulting ceramic layers showing homogeneous surfaces with characteristic material droplets. The ablation crater also reveals selective ablation during the deposition process. EDX results show that Al/Si is retained in the thin films similar to the target composition.

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Insight into the plasma oxidation process during pulsed laser deposition

Irimiciuc

Chertopalov

Bulı́ř

et al. 2021

Plasma Processes & Polymers

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The dynamics of transient plasmas generated by ns laser ablation of Ag targets under various O 2 gas pressures (10 −5 -10 Pa) were investigated by implementing angle-and time-resolved Langmuir probe (LP) analysis and space-and timeresolved optical emission spectroscopy (OES). The effects of an O 2 atmosphere on silver oxide formation and the ionic kinetics and the overall plasma energy were systematically investigated. Measurements performed in the LP floating regime revealed the presence of three-ionic structures with kinetic energies varying from 0.8 to 350 eV, which can be tailored by the addition of O 2 . The timemodulated regime of electron temperature in the 0.5-3 eV observed for pressures higher than 2 Pa of O 2 could be explained by the formation and dissociation of silver oxide molecules. The energetic balance sustains molecular oxide formation, as confirmed by OES measurements, which revealed emission signatures of AgO (B 2 Π 3/2 and X 2 Π 3/2 ) in the 350 nm (B 2 Π 3/2 ) and 460 nm (X 2 Π 3/2 ) spectral regions. Finally, thin films were deposited to understand the range of possibilities offered by pulsed laser deposition of Ag in O 2 . The morphology and atomic structure of the films were analysed for large-scale deposition. Silver oxides were detected in the films starting from 2 Pa, while at higher values, we found mixtures of different Ag x O y phases. A cauliflower-like morphology was dominant above 5 Pa of O 2 atmosphere pressures, which signals the formation of the AgO phase in the deposited film. Our results demonstrate that the properties of deposited thin films are influenced by plasma properties.

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In situ optical and electrical analysis of transient plasmas generated by ns-laser ablation for Ag nanostructured film production

Cited by 12 publications

References 51 publications

On the Dynamics of Transient Plasmas Generated by Nanosecond Laser Ablation of Several Metals

On the Dynamics of Transient Plasmas Generated by Nanosecond Laser Ablation of Several Metals

On the Deposition Process of Ceramic Layer Thin Films for Low-Carbon Steel Pipe Protection

Insight into the plasma oxidation process during pulsed laser deposition

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