Erlangen 2018 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 22: Complex Plasmas and Dusty Plasmas - Poster
P 22.4: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Zelt West
Local extraction of nanoparticles from a dusty CCRF discharge — •Erik von Wahl1, Zahra Marvi1, William Desdions2, Isabelle Géraud-Grenier2, Véronique Massereau-Guibaud2, Maxime Mikikian3, and Holger Kersten1 — 1Institute of Experimental and Applied Physics, Kiel University, Germany — 2GREMI, UMR7344 / Univ. Orléans, F-18020 Bourges, France — 3GREMI, UMR7344 / Univ. Orléans, F-45067 Orléans, France
Contrary to microparticles, clouds of nanoparticles can easily levitate inside a plasma due to little importance of the gravitational force. As each particle collects ions and electrons, it changes the plasma in its vicinity. Having particles distributed in a large volume of the discharge the effect of nanodust on the entire discharge is yet to be fully understood.
In this study, nanoparticles are extracted by a biased silicon substrate at different locations inside the plasma and then examined by scanning electron microscopy. In order to fully comprehend the extraction method the shape of the dust particle cloud is observed by laser light scattering at the wavelength of 350 nm. Differences in the collection results due to the choice of the substrate position are discussed.