Plasma Processes and Polymers
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Online ISSN: 1612-8869
Materials Science Weekly Newsletter
Recently Published Articles
- 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
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.
- 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
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.
- 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
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.
- 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
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.
- 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
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.