In situ analysis of plasma-induced material modifications on nanoparticles for functional applications
Chemical and Thermal Process Engineering
Synthesis and Properties of Functional Materials
Final Report Abstract
The goal of the project was to gain a fundamental understanding of the plasma-induced generation and modifications of small (≪ 100 nm) nanoparticles (NPs). Because it is difficult to generate and treat NPs in a well-defined way in a single plasma-based process, an approach was chosen separating the process into an external NP generation in plasmas operated at larger pressures (∼100 Pa) and subsequent injection into a secondary low-pressure plasma (∼10 Pa) for NP treatment, where this latter plasma allowed long-term confinement of the negatively charged NPs in the positive plasma potential. This feature enabled real-time monitoring of particle optical properties during the treatment. The project was divided into two work packages (WP). WP A was focusing on the plasma interaction with metallic NPs generated in a gas aggregation source, including the study of the particle formation in this source next to their further treatment in the second plasma. WP B investigated the plasma interaction with semiconductor NPs. The WP A provided new and important information on the generation of silver NPs in the gas aggregation source and have demonstrated that these particles can be effectively injected into and modified in the low-pressure discharge with real time monitoring of the growth or etching of thin non-conducting layer on their surface. Moreover, the modified NPs could be effectively extracted on the substrate to measure electric properties of the formed layer of NPs. Finally, these particles have been successfully integrated in a device showing memristive behavior, where the device resistance depended on the previous voltages applied to it. Memristive devices opens a new way to build devices combining data processing and storage with optimized operation for neuronal networks. The WP B focused on the fundamental questions of interaction of reactive plasma with NP surface. We could show that oxygen species (for example O atoms or OH radicals) formed in the plasma are not only etching hydrocarbon particles through the combustion of the carbon into CO or CO2 molecules, but that they can also be absorbed by the material and result in NP growth instead of etching. Additionally, the study with hydrogen and deuterium admixture into plasma with hydrogen passivated silicon NPs provided detailed information about interaction of gaseous reactive hydrogen species (mainly H atoms) with these NPs. This fundamental knowledge is important for the understanding, simulation and optimization of plasmas interacting with carbon- or silicon-based materials for example in microelectronic industry.
Publications
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Controlled composition tuning of alloy nanoparticles in a gas aggregation source monitored by in-situ UV-Vis, 4th German-Czech Workshop on Nanomaterials, Budweis/Czech Republic 2018 – talk
J. Drewes, A. Vahl, O. Polonskyi, T. Strunskus & F. Faupel
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Controlled composition tuning of alloy nanoparticles in a gas aggregation source monitored by in-situ UV-Vis, Materials Science and Engineering (MSE), Darmstadt/Germany 2018 – poster
J. Drewes, A. Vahl, O. Polonskyi, T. Strunskus & F. Faupel
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Control of size, crystallinity and structure of Sinanoparticles synthesized in a capacitively coupled low-pressure plasma, DPG spring meeting, Munich, Germany – poster
O. Asnaz, G. Wieck, T. Dankwort & J. Benedikt
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In-Situ Diagnostic Methods for the Growth and Transport of Nanoparticles in a Gas Aggregation Source, Gaseous Electronics Symposium 3 (GES3), Ljubljana/Slovenia 2020 – talk
J. Drewes, A. Vahl, T. Strunskus, H. Kersten & F. Faupel
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Enhancing composition control of alloy nanoparticles from gas aggregation source by in operando optical emission spectroscopy. Plasma Processes and Polymers, 18(3).
Drewes, Jonas; Vahl, Alexander; Carstens, Niko; Strunskus, Thomas; Polonskyi, Oleksandr & Faupel, Franz
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Impact of argon flow and pressure on the trapping behavior of nanoparticles inside a gas aggregation source. Plasma Processes and Polymers, 19(1).
Drewes, Jonas; Ali‐Ogly, Suren; Strunskus, Thomas; Polonskyi, Oleksandr; Biederman, Hynek; Faupel, Franz & Vahl, Alexander
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In-Situ Diagnostic Methods for the Growth and Transport of Nanoparticles in a Gas Aggregation Source (GAS), 5th German-Czech Workshop on Nanomaterials, Dresden/Germany 2021 (Online) – talk
J. Drewes, A. Vahl, O. Polonskyi, E. Miteva, F. Ziegler, T. Strunskus, H. Kersten & F. Faupel
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In-Situ Diagnostic Methods for the Growth and Transport of Nanoparticles in a Gas Aggregation Source (GAS), NanoWorkshop 2021, Varese/Italy 2021 – talk
J. Drewes, A. Vahl, O. Polonskyi, E. Miteva, F. Ziegler,T. Strunskus, H. Kersten & F. Faupel
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Infrared-spectrometric Monitoring of the Growth and Surface Treatment of a-C:H nanoparticles in a low-pressure plasma, 4th Conference “Nanotechnology and Innovation in the Baltic Sea Region”, virtual – talk
O. Asnaz, N. Kohlmann, H. Folger, F. Greiner & J. Benedikt
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Infrared-spectrometric monitoring of the growth and surface treatment of a-C:H nanoparticles in a low-pressure plasma, DPG SMuK conference, virtual – talk
O. Asnaz, N. Kohlmann, H. Folger, F. Greiner & J. Benedikt
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Infrared-spectrometric Monitoring of the Growth and Surface Treatment of Nanoparticles in a Low-pressure Plasma, 23rd Symposium on Application of Plasma Processes, virtual – talk
O. Asnaz, F. Greiner & J. Benedikt
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Growth and treatment of hydrogenated amorphous carbon nanoparticles in a low‐pressure plasma. Plasma Processes and Polymers, 19(4).
Asnaz, Oguz Han; Kohlmann, Niklas; Folger, Hauke; Greiner, Franko & Benedikt, Jan
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In situ infrared spectroscopy for the analysis of plasma interaction with nanoparticles, 27ter Erfahrungsaustausch Oberflächentechnologie mit Plasma- und Ionenstrahlprozessen, Mühlleithen, Germany – talk
O. Asnaz & J. Benedikt
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In Situ Laser Light Scattering for Temporally and Locally Resolved Studies on Nanoparticle Trapping in a Gas Aggregation Source. Particle & Particle Systems Characterization, 39(11).
Drewes, Jonas; Rehders, Stefan; Strunskus, Thomas; Kersten, Holger; Faupel, Franz & Vahl, Alexander
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A novel method for the synthesis of core-shell nanoparticles for functional applications, 24th Symposium on Application of Plasma Processes, Štrbské Pleso, Slovakia – talk
O. Asnaz, J. Drewes, M. Elis, T. Strunskus, F. Greiner, O. Polonskyi, F. Faupel, L. Kienle, A. Vahl & J. Benedikt
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A novel method for the synthesis of core–shell nanoparticles for functional applications based on long-term confinement in a radio frequency plasma. Nanoscale Advances, 5(4), 1115-1123.
Asnaz, Oguz Han; Drewes, Jonas; Elis, Marie; Strunskus, Thomas; Greiner, Franko; Polonskyi, Oleksandr; Faupel, Franz; Kienle, Lorenz; Vahl, Alexander & Benedikt, Jan
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Controlled synthesis of core-shell nanoparticles for functional applications, 25th International Symposium on Plasma Chemistry, Kyoto, Japan
O. Asnaz, J. Drewes, M. Elis, F. Greiner, F. Faupel, L. Kienle, A. Vahl & J. Benedikt
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How to locate nanoparticles: Using in-situ diagnostics to understand growth and trapping dynamics, 11th International workshop on functional nanocomposites, Plön, Germany – talk
J. Drewes, O. Asnaz, O. Polonskyi, S. Rehders, F. Greiner, T. Strunskus, H. Kersten, J. Benedikt, F. Faupel & A. Vahl
