Abstract
Plasma-enhanced chemical vapor deposition is a well-developed technique that is commonly applied in the preparation of thin films. However, this technique is limited to thermodynamically stable and chemically inert precursor gases or vapors. Recently, pulsed aerosol-assisted plasma processes have emerged as an advantageous alternative that allows for the injection of various liquid solutions in the plasma, regardless of their properties. This study examines the production of thin films by pulsed injection of pentane aerosols into a low-pressure RF capacitively coupled plasma. This technique produces thin films with high material balance and a high degree of control by adjusting the pulsed injection parameters. At the pulse scale, pulsed injection induces a temporary increase in the working pressure, resulting in time-dependent mechanisms that can affect the dynamics of thin-film deposition at the process scale. Overall, the results show a key role of droplets and their kinetics (ballistic transport, vaporization kinetics, electrostatic confinement). Hence, to efficiently apply this method in the preparation of (multi-)functional coatings, the aerosol must be carefully characterized.
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Data Availability
The PDLI-plasma processes described herein are patented in EP 3275839 / WO 2018019862.
Notes
free software: https://imagej.nih.gov/ij/
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Acknowledgements
The authors would like to thank the research federation FERMAT in Toulouse for giving access to their rapid imaging facilities.
Funding
This work was financially supported by the Centre National de la Recherche Scientifique (CNRS), the STAE-RTRA foundation (Toulouse, France) under the RTRA-STAE/2014/P/VIMA/12 project grant, the National Science and Engineering Research Council in the context of the Alliance project grant, and Prima-Québec. Financial support from CNRS, Université de Montréal, and Université de Toulouse III – Paul Sabatier through their contributions to the International Research Network on Controlled Multifunctional Nanomaterials (IRN NMC) is also acknowledged.
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The experiments were performed by GC, CS, DP, ZZ, HK and RCo. GC, VP, and TV developed the high-speed camera experiments. CVF, MLK, LS, and RCl provided their expertise on AFM, DLI, chemistry, thin films and plasma processes. All authors participated in the discussion and interpretation of the data and contributed to the final manuscript.
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Carnide, G., Simonnet, C., Parmar, D. et al. Pulsed Aerosol-Assisted Low-Pressure Plasma for Thin-Film Deposition. Plasma Chem Plasma Process (2024). https://doi.org/10.1007/s11090-024-10455-x
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DOI: https://doi.org/10.1007/s11090-024-10455-x