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Open AccessArticle

Investigations of Transient Plasma Generated by Laser Ablation of Hydroxyapatite during the Pulsed Laser Deposition Process

1
Department of Physics, “Gh. Asachi” Technical University of Iasi, 700050 Iasi, Romania
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Romanian Scientists Academy, 050094 Bucharest, Romania
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Faculty of Materials Science and Engineering, “Gh. Asachi” Technical University of Iasi, 700050 Iasi, Romania
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Faculty of Physics, LOA-SL, Alexandru Ioan Cuza University of Iasi, 700506 Iasi, Romania
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Institute for Laser, Plasma and Radiation Physics, 077125 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Symmetry 2020, 12(1), 132; https://doi.org/10.3390/sym12010132
Received: 15 December 2019 / Revised: 3 January 2020 / Accepted: 7 January 2020 / Published: 9 January 2020
(This article belongs to the Special Issue Advances in Laser Produced Plasmas Research)
The optimization of the pulsed laser deposition process was attempted here for the generation of hydroxyapatite thin films. The deposition process was monitored with an ICCD (Intensified Coupled Charged Device) fast gated camera and a high-resolution spectrometer. The global dynamics of the laser produced plasma showed a self-structuring into three components with different composition and kinetics. The optical emission spectroscopy revealed the formation of a stoichiometric plasma and proved that the segregation in the kinetic energy of the plasma structure is also reflected by the individual energies of the ejected particles. Atomic Force Microscopy was also implemented to investigate the properties and the quality of the deposited film. The presence of micrometric clusters was seen at a high laser fluence deposition with in-situ ICCD imaging. We developed a fractal model based on Schrödinger type functionalities. The model can cover the distribution of the excited states in the laser produced plasma. Moreover, we proved that SL(2R) invariance can facilitate plasma substructures synchronization through a self-modulation in amplitude. View Full-Text
Keywords: pulsed laser deposition; plasma diagnostic; hydroxyapatite thin film; plasma structuring; SL(2R) invariance pulsed laser deposition; plasma diagnostic; hydroxyapatite thin film; plasma structuring; SL(2R) invariance
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MDPI and ACS Style

Agop, M.; Cimpoesu, N.; Gurlui, S.; Irimiciuc, S.A. Investigations of Transient Plasma Generated by Laser Ablation of Hydroxyapatite during the Pulsed Laser Deposition Process. Symmetry 2020, 12, 132.

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