Particle number density and velocity distributions in laser plumes

Козлов, Б. Н.; Pilyugin, I. I.; Shchebelin, V. G.; Bulgakov, Alexander V.; Mayorov, A. P.; Predtechenskii, M. R.

doi:10.1007/bf01244425

Cited by 9 publications

(7 citation statements)

References 15 publications

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“…This decrease is clearly more dependent on mass than in our measurements. In a later work, Kozlov et al [12] performed similar investigations with Nd:YAG pulsed laser (1040 nm, 20 ns) with the fluence of 5.0 J/cm 2 . The velocities were smaller, about 0.4 Â 10 4 m/s, but the velocity of Cu was smaller than that of Ba.…”

Section: Discussionmentioning

confidence: 88%

Ablation of CdTe with 100μs pulses from Nd:YAG laser: Velocity distribution of emitted particles

Rzeszutek

Oszwałdowski

Savchuk

2008

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Discussionmentioning

confidence: 88%

Ablation of CdTe with 100μs pulses from Nd:YAG laser: Velocity distribution of emitted particles

Rzeszutek

Oszwałdowski

Savchuk

2008

Nuclear Instruments and Methods in Physics Research Section B:

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“…The ion source and the deflection system of the reflectron TOF MS were designed to detect fast ions in the ablation plasma. Before entering the flight tube of the mass spectrometer, the ion path was adjusted by a pair of deflection plates in order to compensate for their initial velocities optimizing the ion collection efficiency; this enabled equal collection efficiency for all plume ions with kinetic energies up to 50 eV. − The neutral ejected species were analyzed in a linear TOF MS provided with a postionization F 2 excimer laser (λ = 157 nm, E ≤5 mJ). The target surface was placed parallel to the flight axis of the spectrometer at distances in the range of 0.5–2.5 cm; in this way, the mildly focused postionization laser beam could interact with the plume at different distances from the target surface and at different time delays with respect to the ablation pulse.…”

Section: Experimental Methodsmentioning

confidence: 99%

Co-Doped ZnS Clusters and Nanostructures Produced by Pulsed Laser Ablation

et al. 2013

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In this work, we synthesize Co-doped ZnS nanocrystals by pulsed laser ablation and deposition and investigate the composition and dynamics of the plasma produced in the ablation by time-of-flight mass spectrometry. The first experimental observation of Co-substituted ZnS clusters in the ablation plasma is reported; three series of cationic bimetallic clusters Zn n–m Co m S n +, Zn n–m Co m S n+1 +, and Zn n–m Co m S n–1 + are identified upon 1064 nm laser ablation of targets of Co (2%) in ZnS. Neutral clusters produced in the ablation are also observed by F2 laser (λ = 157 nm) postionization. Deposits are collected at the same laser ablation wavelength and fluence at which the above bimetallic clusters are observed in the plasma. Analysis by high-resolution transmission electron microscopy and energy-dispersive X-ray spectrometry obtains that the deposits are composed of Zn0.96Co0.04S nanocrystals with local structure showing epitaxial growth between the zinc blende and wurtzite politypes. The deposits show paramagnetic behavior, but no magnetic ordering is observed. The results constitute a first step to help to elucidate the participation of cluster assembly processes in the synthesis of Co-doped ZnS nanomaterials by pulsed laser ablation and deposition.

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“…Several studies deal with the analysis of the plasma plume which is formed during the laser ablation process. The detection of excited and ground-state species and the measurement of their velocity distributions has been performed using emission spectroscopy [9][10][11][12][13][14], laserinduced fluorescence [15,16], ion probe measurements [10] and mass spectrometry [17][18][19]. Contradictory observations have been made concerning the role of gas-phase reactions in the volume between target and substrate.…”

Section: Introductionmentioning

confidence: 99%

Analyses of gas-phase reactions during reactive laser ablation using emission spectroscopy

Hermann

Dutouquet

1999

J. Phys. D: Appl. Phys.

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Time-and space-resolved emission spectroscopic measurements have been performed to investigate the formation of molecular species in the plasma plume generated by pulsed-laser ablation of Al, C and Ti targets in either N 2 or O 2 low-pressure atmospheres. The recorded spectra show that the interaction between the vapour plume and the ambient gas gives rise to the partial dissociation and ionization of the ambient gas and that the formation of nitride or oxide diatomics depends strongly on the binding energies of these species with respect to dissociation potential of the gas molecules. Thus, nitride formation in the gas phase occurred only during carbon ablation while oxide molecules were detected in the plasma plume originating from every target material. The influence of the atomic mass of the target material on the gas-phase reactions is also discussed. The results contribute to a better understanding of the mechanisms involved in the thin-film synthesis by reactive pulsed laser deposition.

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Particle number density and velocity distributions in laser plumes

Cited by 9 publications

References 15 publications

Ablation of CdTe with 100μs pulses from Nd:YAG laser: Velocity distribution of emitted particles

Ablation of CdTe with 100μs pulses from Nd:YAG laser: Velocity distribution of emitted particles

Co-Doped ZnS Clusters and Nanostructures Produced by Pulsed Laser Ablation

Analyses of gas-phase reactions during reactive laser ablation using emission spectroscopy

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