Plasma Processes and Polymers

Cover image for Vol. 11 Issue 4

Online ISSN: 1612-8869

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Recently Published Articles

  1. On the Deposition Rates of Magnetron Sputtered Thin Films at Oblique Angles

    Rafael Alvarez, Jose M. Garcia-Martin, Maria C. Lopez-Santos, Victor Rico, Francisco J. Ferrer, Jose Cotrino, Agustin R. Gonzalez-Elipe and Alberto Palmero

    Article first published online: 17 APR 2014 | DOI: 10.1002/ppap.201300201

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    A simple formula relating the deposition rates for the magnetron sputtered thin films at oblique angles, the background pressure of the gases and the tilt angles of the substrate is derived for general conditions. This formula is experimentally tested, finding a good agreement in all the studied cases, even in conditions where the Keller–Simmons formula is not applicable.

  2. Surface Functionalization by Plasma Treatment and Click Chemistry of a New Family of Fluorinated Polymeric Materials for Microfluidic Chips

    Yoann Ladner, Fanny D'Orlyé, Camille Perréard, Bradley Da Silva, Cédric Guyon, Michael Tatoulian, Sophie Griveau, Fethi Bedioui and Anne Varenne

    Article first published online: 17 APR 2014 | DOI: 10.1002/ppap.201300120

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    A method based on plasma polymerization followed by surface “click” chemistry was developed for the robust functionalization of THV material. The THV surface was characterized in terms of stability, thickness, homogeneity and chemical composition. A fluorescent dye was then successfully immobilized on these surfaces by click reaction. This process opens the way to incorporate different functional groups on THV, for the development of THV analytical microchips

  3. Morphology Transformations of Platelets on Plasma Activated Surfaces

    Martina Modic, Ita Junkar, Karin Stana-Kleinschek, Rok Kostanjšek and Miran Mozetič

    Article first published online: 9 APR 2014 | DOI: 10.1002/ppap.201400001

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    RF oxygen plasma treatment is used for surface modification of polyethylene terephthalate polymer surface. Newly acquired surface properties analyzed with XPS, WCA, and AFM show significant improvement of hemocompatibility. In contact with whole human blood, SEM images revealed reduced number of activated adhered platelets on the surface of plasma treated polymer.

  4. The Reinforcement Ability of Plasma-Etched Carbon Nanofibers on Mechanical Properties of C-Epoxy Composites

    Killi Krushnamurty, Pappireddy Manoj Kumar Reddy, Ivaturi Srikanth, Pinnelli S. R. Prasad, Partha Ghosal and Challapalli Subrahmanyam

    Article first published online: 7 APR 2014 | DOI: 10.1002/ppap.201400014

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    Carbon nanofibers (CNFs) are plasma etched by using cold plasma of helium and air for different time durations. Changes in surface characteristics of CNFs due to plasma treatment was studied with Raman spectroscopy. Raman spectroscopic studies showed that, plasma treatment is imparting enhanced degree of disorder for CNFs. Plasma-etched CNFs-C-epoxy composites can improve the mechanical properties of CFRPs significantly as compared to untreated CNFs.

  5. Influence of Deposition Conditions on Structure and Aging of C:H:O Plasma Polymer Films Prepared from Acetone/CO2 Mixtures

    Martin Drabik, Jaroslav Kousal, Coralie Celma, Patrick Rupper, Hynek Biederman and Dirk Hegemann

    Article first published online: 6 APR 2014 | DOI: 10.1002/ppap.201400005

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    The deposition process and properties of C:H:O plasma polymer films is discussed in the dependence on variable experimental conditions. A substantial part of the study is devoted to the aging of the films both in air and in water in order to test their stability and to enable, e.g., biomedical applications. Permanent hydrophilic films can be obtained comprising low amounts of ester groups.