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

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

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1016/j.apsusc.2018.06.217

Title :

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

Author(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]

Journal title :

Applied Surface Science

Pages :

717-725

Publisher :

Elsevier

Publication date :

2018

ISSN :

0169-4332

English keyword(s) :

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

HAL domain(s) :

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

English abstract : [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. ...
Show more >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.Show less >

Language :

Anglais

Popular science :

Non

Collections :

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

Source :

Harvested from HAL

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