Plasma Processes and Polymers

Cover image for Vol. 12 Issue 6

Online ISSN: 1612-8869

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Recently Published Articles

  1. Non-Thermal Plasma Treatment of Agricultural Seeds for Stimulation of Germination, Removal of Surface Contamination and Other Benefits: A Review

    Lakshman K. Randeniya and Gerard J. J. B. de Groot

    Article first published online: 24 JUN 2015 | DOI: 10.1002/ppap.201500042

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    Non-thermal plasma is a promising technology for treatment of plant seeds prior to cultivation. The known benefits include removal of microbial content, improving stress tolerance, improving germination properties and enhancing seedling vigour. Non-thermal plasma treatments of seeds can lead to enhanced plant growth and higher crop yields. The method has the potential to replace or complement conventional chemical-based and other priming techniques.

  2. Ag:TiN-Coated Polyurethane for Dry Biopotential Electrodes: From Polymer Plasma Interface Activation to the First EEG Measurements

    Paulo Pedrosa, Patrique Fiedler, Cláudia Lopes, Eduardo Alves, Nuno P. Barradas, Jens Haueisen, Ana V. Machado, Carlos Fonseca and Filipe Vaz

    Article first published online: 24 JUN 2015 | DOI: 10.1002/ppap.201500063

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    The plasma activated and Ag:TiN-coated dry biopotential electrodes are promising candidates to replace the standard wet Ag/AgCl electrodes. The optimized plasma treatments translate into excellent polyurethane/Ag:TiN interfacial adhesion of the samples. The EEG validation of the proposed Ag:TiN-coated PU multipin electrodes showed no considerable differences of the signals when comparing with the reference wet electrodes.

  3. Elastic Modulus and Hardness of Plasma-Polymerized Organosilicones Evaluated by Nanoindentation Techniques

    Vladimir Cech, Jaroslav Lukes, Erik Palesch and Tomas Lasota

    Article first published online: 22 JUN 2015 | DOI: 10.1002/ppap.201500036

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    The depth profile of the elastic modulus and hardness is very helpful and should be a standard method of characterizing the reproducibility of data and extrapolating data to the film surface (zero contact depth) to determine the correct mechanical properties of tested film. The depth profile is necessary to reveal the size effect, the effect of surface topography, or inhomogeneity of tested materials.

  4. Innovative Applications of Surface Wettability Measurements for Plasma-Modified Three-Dimensional Porous Polymeric Materials: A Review

    Morgan J. Hawker, Adoracion Pegalajar-Jurado and Ellen R. Fisher

    Article first published online: 16 JUN 2015 | DOI: 10.1002/ppap.201500035

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    The wettability of plasma-modified, porous, 3D, polymeric constructs is an important property for biomedical and environmental applications. Wettability measurements on these complex substrates, however, present numerous challenges. This review highlights methods used to assess the wettability of numerous plasma-treated porous, 3D, polymeric materials, and provides five recommendations for best practice.

  5. Chemical Analysis of Plasma-treated Organic Surfaces and Plasma Polymers by Secondary Ion Mass Spectrometry

    Arnaud Delcorte, Vanina Cristaudo, Mohammad Zarshenas, Delphine Merche, François Reniers and Patrick Bertrand

    Article first published online: 16 JUN 2015 | DOI: 10.1002/ppap.201500061

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    This feature article is focused on the application of time-of-flight secondary ion mass spectrometry (ToF-SIMS) to the characterization of plasma-treated organic materials and polymers, including plasma polymer films. The benefits of using SIMS for molecular surface analysis but also 3D chemical analysis is highlighted through various case studies. We emphasize two analytical developments, molecular depth profiling using cluster projectiles, and multivariate data analysis, which may bring a step change for the analysis of plasma-processed thin films.