Journal article
Particle trapping, size-filtering, and focusing in the nonthermal plasma synthesis of sub-10 nanometer particles
Journal of physics. D, Applied physics, Vol.55(23), p.235202
06/09/2022
DOI: 10.1088/1361-6463/ac57de
Abstract
Low-pressure nonthermal flowing plasmas are widely used for the gas-phase synthesis of nanoparticles and quantum dots of materials that are difficult or impractical to synthesize using other techniques. To date, the impact of temporary electrostatic particle trapping in these plasmas has not been recognized, a process that may be leveraged to control particle properties. Here, we present experimental and computational evidence that, during their growth in the plasma, sub-10 nm silicon particles become temporarily confined in an electrostatic trap in radio-frequency excited plasmas until they grow to a size at which the increasing drag force imparted by the flowing gas entrains the particles, carrying them out of the trap. We demonstrate that this trapping enables the size filtering of the synthesized particles, leading to highly monodisperse particle sizes, as well as the electrostatic focusing of the particles onto the reactor centerline. Understanding of the mechanisms and utilization of such particle trapping will enable the design of plasma processes with improved size control and the ability to grow heterostructured nanoparticles.
Details
- Title: Subtitle
- Particle trapping, size-filtering, and focusing in the nonthermal plasma synthesis of sub-10 nanometer particles
- Creators
- Zichang Xiong - University of MinnesotaSteven Lanham - University of MichiganEric Husmann - Washington University in St. LouisGunnar Nelson - University of MinnesotaMohammad Ali Eslamisaray - University of MinnesotaJordyn Polito - University of MichiganYaling Liu - University of MinnesotaJohn Goree - University of IowaElijah Thimsen - Washington University in St. LouisMark J. Kushner - University of MichiganUwe R. Kortshagen - University of Minnesota
- Resource Type
- Journal article
- Publication Details
- Journal of physics. D, Applied physics, Vol.55(23), p.235202
- DOI
- 10.1088/1361-6463/ac57de
- ISSN
- 0022-3727
- eISSN
- 1361-6463
- Publisher
- IOP Publishing Ltd
- Number of pages
- 13
- Grant note
- DMR-2011401; ECCS-2025124 / US National Science Foundation through the MRSEC ECCS-2025124 / US National Science Foundation through the NNCI W911NF-18-1-0240 / Army Research Office under MURI DE-SC0020232 / US Department of Energy, Office of Science, Office of Fusion Energy Sciences; United States Department of Energy (DOE)
- Language
- English
- Date published
- 06/09/2022
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984428660802771
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