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Université d'Orléans |  |
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Université d'Orléans | |
| HAL : hal-00690916, version 1 |
| DOI : 10.1088/1367-2630/14/2/023024 |
| Fiche détaillée |  Récupérer au format |
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| New Journal of Physics 14 (2012) 023024 |
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| The formation and transport phenomena of nanometre-sized particles in a dc plasma |
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| Lisa Wörner 1, 2Eva Kovacevic 1 |
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| (13/02/2012) |
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| The growth of nanoparticles in low-temperature plasmas is often accompanied by the formation of complex particle patterns and intricate transport processes. This paper deals with the formation and growth of nanoparticles operated in a mixture of argon and acetylene. The experiments are performed in a cylindrical dc discharge, the so-called PK-4 facility that shall be launched to the International Space Station (ISS) in 2014. The experiments show that the particles are formed in a localized region close to the anode and are transported as still localized dust structures ('dust bullets') along the glass tube. The formation of new particles triggers an oscillatory process that is characterized by the periodic appearance and subsequent removal of dust particles. The frequency of this process, as well as the size of the particles within each 'dust bullet', can be controlled by means of the neutral gas flow. This behaviour can be understood by analysing the size-dependent forces acting on the growing particles. |
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| 1 : | Groupe de recherches sur l'énergétique des milieux ionisés (GREMI) |
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CNRS : UMR6606 – Université d'Orléans |
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| 2 : | Max-Planck-Institute for Extraterrestrial Physics (MPE) |
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Max-Planck-Institut |
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| 3 : | Max-Planck-Institut für extraterrestrische Physik (MPE) |
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Max-Planck-Institut |
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| 4 : | Max-Planck-Institute for extraterrestrial Physics |
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Max-Planck-Institute for extraterrestrial Physics |
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| Domaine | : | Physique/Physique/Physique des plasmas |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00690916, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00690916 | |
| oai:hal.archives-ouvertes.fr:hal-00690916 | |
| Contributeur : Eva Kovacevic | |
| Soumis le : Mercredi 25 Avril 2012, 09:37:35 | |
| Dernière modification le : Mercredi 25 Avril 2012, 11:24:50 | |
