Excimer laser ablation of graphite: The enhancement of carbon dimer formation

Ursu, C.; Nica, P.; Focsa, Cristian

Type de document :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1016/j.apsusc.2018.06.217

Titre :

Excimer laser ablation of graphite: The enhancement of carbon dimer formation

Auteur(s) :

Ursu, C. [Auteur]
“Petru Poni” Institute of Macromolecular Chemistry
Nica, P. [Auteur]
"Gheorghe Asachi" Technical University of Iasi [TUIASI]
Focsa, Cristian [Auteur]

Physique Moléculaire aux Interfaces [PMI]

Titre de la revue :

Applied Surface Science

Pagination :

717-725

Éditeur :

Elsevier

Date de publication :

2018

ISSN :

0169-4332

Mot(s)-clé(s) en anglais :

excimer laser ablation
carbon plasma
carbon dimer
ablation crater
transient plasma dynamics

Discipline(s) HAL :

Physique [physics]/Physique [physics]/Physique des plasmas [physics.plasm-ph]

Résumé en anglais : [en]

Carbon plasmas produced by laser ablation can have important applications in the synthesis of nanostructured materials of high current interest (nanotubes, nanowires, graphene) or the deposition of diamond-like thin films. ...
Lire la suite >Carbon plasmas produced by laser ablation can have important applications in the synthesis of nanostructured materials of high current interest (nanotubes, nanowires, graphene) or the deposition of diamond-like thin films. Understanding the fundamental aspects of such transient plasmas in various experimental configurations is useful for optimization of these synthesis/deposition processes. We report here a comprehensive study on the dynamics of an excimer laser produced carbon plasma, including fast photography, space- and time-resolved optical emission spectroscopy, Faraday cup ion current measurements, ablated crater depth profiling. A peculiar V-like shape of the emitting plume is evidenced and explained by the interaction of three plasma structures originating in distinct irradiance areas of the laser spot on the target. The interaction of these structures is also thought to favor an enhanced carbon dimer production, mainly through three-body recombination, at distances significantly higher than previously reported in the literature, which can find technological applications for the efficient deposition of high quality carbon-based nanostructures.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Collections :

Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523

Source :

Harvested from HAL

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