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Diagnostics of void expansion during cyclic growth and formation of layered nanoparticle clouds
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0003-3767-225X
Christian Albrechts University of Kiel, Germany.
2017 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 121, no 11, 113302Article in journal (Refereed) Published
Abstract [en]

Nanoparticles were grown in an argon-acetylene plasma, and the particle size was characterized during growth using imaging Mie ellipsometry (I-Mie). The typical cyclic growth was observed, and the previously reported expansion and contraction of the void before depletion of nanoparticles [van de Wetering et al., J. Phys. D: Appl. Phys. 48, 035204 (2015)] was independently confirmed in our measurements. The cyclic growth was interrupted by repetitively turning the acetylene flow on and off. The nanoparticles that were confined in the discharge proceeded to grow slowly but more importantly a new growth cycle started with nucleation and growth taking place in the void region. The additional growth burst in the void region leads to a structured dust cloud with regions of nanoparticles with different sizes that were sharply separated. The advantages of using the I-Mie diagnostics for the observation of nanoparticles compared to standard video microscopy are demonstrated for the structured dust cloud. The results are discussed in relation to the growth processes for nucleation and coagulation.

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2017. Vol. 121, no 11, 113302
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-136584DOI: 10.1063/1.4978421ISI: 000397421400011OAI: oai:DiVA.org:liu-136584DiVA: diva2:1089995
Note

Funding Agencies|Swedish Research Council [2008-6572]; Linkoping Linneaus Environment LiLi-NFM; Deutsche Forschungsgemeinschaft DFG [SFB-TR24]

Available from: 2017-04-21 Created: 2017-04-21 Last updated: 2017-04-21

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CiteExportLink to record
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