Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/3599
Título: Particle agglomeration study in rf silane plasmas: In situ study by polarization-sensitive laser light scattering
Autor: Courteille, C.
Hollenstein, C.
Dorier, J. L.
Gay, P.
Schwarzenbach, W.
Howling, A. A.
Bertran, E.
Viera, G.
Martins, R.
Maçarico, António Filipe Ruas da Trindade
Palavras-chave: Trapping Phenomena
Data: 15-Ago-1996
Editora: Amer Inst Physics
Citação: COURTEILLE, C.; HOLLENSTEIN, C.; DORIER, J. L.; GAY, P.; SCHWARZENBACH, W. ; HOWLING, A. A.; BERTRAN, E.; VIERA, G.; MARTINS, R.; MAÇARICO, A. - Particle agglomeration study in rf silane plasmas: In situ study by polarization-sensitive laser light scattering. Journal of Apllied Physics. ISSN 0021-8979. Vol. 80, nr. 4 (1996), p. 2069-2078.
Resumo: To determine self-consistently the time evolution of particle size and their number density in situ multi-angle polarization-sensitive laser light scattering was used. Cross-polarization intensities (incident and scattered light intensities with opposite polarization) measured at 135 degrees and ex situ transmission electronic microscopy analysis demonstrate the existence of nonspherical agglomerates during the early phase of agglomeration. Later in the particle time development both techniques reveal spherical particles again. The presence of strong cross-polarization intensities is accompanied by low-frequency instabilities detected on the scattered light intensities and plasma emission. It is found that the particle radius and particle number density during the agglomeration phase can be well described by the Brownian free molecule coagulation model. Application of this neutral particle coagulation model is justified by calculation of the particle charge whereby it is shown that particles of a few tens of nanometer can be considered as neutral under our experimental conditions. The measured particle dispersion can be well described by a Brownian free molecule coagulation model including a log-normal particle size distribution. (C) 1996 American Institute of Physics.
Peer review: yes
URI: http://hdl.handle.net/10400.21/3599
ISSN: 0021-8979
Versão do Editor: http://scitation.aip.org/content/aip/journal/jap/80/4/10.1063/1.363118
Aparece nas colecções:ISEL - Física - Artigos

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