Plasma Processes and Polymers

Cover image for Vol. 12 Issue 11

Online ISSN: 1612-8869

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Recently Published Articles

  1. Expanding Thermal Plasma Deposition of Al-Doped ZnO: On the Effect of the Plasma Chemistry on Film Growth Mechanisms

    Benjamin L. Williams, Mikhail V. Ponomarev, Marcel A. Verheijen, Harm C. M. Knoops, Abhinaya Chandramohan, Leo Duval, Mauritius C. M. van de Sanden and Mariadriana Creatore

    Article first published online: 30 NOV 2015 | DOI: 10.1002/ppap.201500179

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    A review of expanding thermal plasma—chemical vapour deposition (ETP-CVD) of Al-doped ZnO (ZnO:Al) transparent conducting oxides (TCOs), alongside new results. Insights into the roles of: (a) plasma chemistry; and (b) surface growth mechanisms on the microstructure and eventual opto-electronic properties of ZnO:Al films are provided. Poor electrical properties (resistivity, electron mobility) at low film thicknesses is attributed to a growth-mode driven by high nucleation probability and strong <0002>-texture which results in small-grained, voided material. By increasing Zn-precursor flow rate, the atomic-O flux arriving at the substrate is reduced, thereby reducing nucleation probability and the dominance of <0002>-texture, ultimately yielding larger grained, more compact films with significantly improved electrical properties. The plasma chemistry reaction routes are investigated to provide the link between plasma conditions and film properties.

  2. Plasma Processing of Electrospun Li-Ion Battery Separators to Improve Electrolyte Uptake

    Romolo Laurita, Marco Zaccaria, Matteo Gherardi, Davide Fabiani, Andrea Merlettini, Antonino Pollicino, Maria Letizia Focarete and Vittorio Colombo

    Article first published online: 27 NOV 2015 | DOI: 10.1002/ppap.201500145

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    Plasma treatment of electrospun PVdF separator increases electrolyte uptake ten times larger than commercial Celgard.

  3. Fuel Cell Electrodes From Organometallic Platinum Precursors: An Easy Atmospheric Plasma Approach

    Delphine Merche, Thierry Dufour, Joffrey Baneton, Giuseppe Caldarella, Vinciane Debaille, Nathalie Job and François Reniers

    Article first published online: 26 NOV 2015 | DOI: 10.1002/ppap.201500157

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    Pt NPs are deposited on carbon black (CB) from the dissociation of [Pt(acac)2] by using an atmospheric plasma torch for fuel cells applications. The optimization of the treatment time and the temperature allows the tuning of Pt content and oxidation degree measured by XPS. Electrodes realized by treating the mixture CB/[Pt(acac)2] overlaid on GDL are tested in a mono-fuel cell by ICP-MS, cyclic voltammetry, and dynamical polarization curves.

  4. Biodeactivation of Lipopolysaccharide Correlates with Surface-Bound NO3 After Cold Atmospheric Plasma Treatment

    Elliot A. J. Bartis, Pingshan Luan, Andrew J. Knoll, David B. Graves, Joonil Seog and Gottlieb S. Oehrlein

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500072

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    We report on measurements of surface-bound NO3on a variety of materials after treatment by both an atmospheric pressure plasma jet and surface microdischarge. This species forms on polymers containing neither nitrogen nor oxygen, indicating that it forms in the gas phase. The concentration of surface-bound NO3, not general oxidation, correlates with the biodeactivation of lipopolysaccharide, a pyrogenic biomolecule. This is the first attempt to correlate a specific surface moiety with biological function.

  5. Plasma-Assisted Synthesis of Chlorinated Polyvinyl Chloride (CPVC) Using a Plasma Circulating Fluidized Bed Reactor (PCFBR)

    Qianli Yang, Wei Lu, Ding Mao, Rui Yang and Yi Cheng

    Article first published online: 24 NOV 2015 | DOI: 10.1002/ppap.201500081

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    This work presents a novel gas-solid method which employs a plasma circulating fluidized bed reactor (PCFBR) operated at atmospheric pressure to synthesize CPVC. The results prove the feasibility of process decoupling method and characterization of CPVC products suggests that the quality of self-made CPVCs is comparable to the commercial products in terms of microstructure.