Plasma Processes and Polymers

Cover image for Vol. 10 Issue 7

July 2013

Volume 10, Issue 7

Pages 577–659

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      Plasma Process. Polym. 7∕2013 (page 577)

      María G. Neira-Velázquez, Ernesto Hernández-Hernández, Luis F. Ramos-deValle, Carlos A. Ávila-Orta, Yibran A. Perera-Mercado, Silvia G. Solís-Rosales, Pablo González-Morones, Arturo Ponce-Pedraza, Miguel Ávalos-Borja, Rosa I. Narro-Céspedes and Pascual Bartolo-Pérez

      Version of Record online: 4 JUL 2013 | DOI: 10.1002/ppap.201370019

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      Cover: Plasma treatment of CNFs using acrylic acid promotes their hydrophilic character. This new surface property of CNFs is a result of an increase of oxygen concentration at the surface of treated CNFs which has been demonstrated by XPS and ELLS spectroscopy. The dispersion of plasma treated CNFs in water was stable. Further details can be found in the article by Mariá G. Neira-Velázquez et al. on page 627.

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    1. Surface Chemical Modification of Carbon Nanowalls for Wide-Range Control of Surface Wettability (pages 582–592)

      Hitoshi Watanabe, Hiroki Kondo, Mineo Hiramatsu, Makoto Sekine, Shailesh Kumar, Kostya Ostrikov and Masaru Hori

      Version of Record online: 22 MAY 2013 | DOI: 10.1002/ppap.201200141

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      CNW surface functionalization and its effects on surface wettability are investigated using post-growth plasma surface treatments. The as-grown CNWs are obtained using CH4/H2 mixtures, and are then exposed to atmospheric pressure plasmas of either Ar or CF4. The results demonstrated that the functionalization occurs mainly at the CNW surfaces, edges, and defects, and has no impact on the CNW morphology; however, the chemical changes are sufficient as to render the CNW surfaces either super-hydrophilic or super-hydrophobic.

    2. Mass Spectrometric Characterizations of Ions Generated in RF Magnetron Discharges during Sputtering of Silver in Ne, Ar, Kr an.d Xe Gases (pages 593–602)

      Petr Pokorný, Michal Novotný, Jindřich Musil, Přemysl Fitl, Jiří Bulíř and Ján Lančok

      Version of Record online: 7 JUN 2013 | DOI: 10.1002/ppap.201200145

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      The physical properties of noble gases strongly influence the yield of atoms sputtered from a magnetron target, as well as the kinds of ions generated in the RF discharges. The amount of individual ions, their energies and ion energy distribution functions are studied here as a function of the sputtering gas and their pressure.

    3. Surface and Electrochemical Properties of Plasma-Treated Polypropylene Track Membrane (pages 603–618)

      Liubov Kravets, Alla Gilman, Mikhail Yablokov, Vera Elinson, Bogdana Mitu and Gheorghe Dinescu

      Version of Record online: 8 APR 2013 | DOI: 10.1002/ppap.201200084

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      This work is aimed to study the surface and electrochemical properties of polypropylene track membrane modified by plasma of non-polymerizing gases and the attempt in determination of a quantitative dependence between the concentration of functional polar groups in the surface layer of the membranes and their electrochemical properties. It is shown that the measured electrical current through the membranes depends on the pore diameter and the chemical structure of the pore surface – type and concentration of the fixed functional groups.

    4. Optimization of Plasma Polymerized Ethylenediamine Film Chemistry on Quartz Particles (pages 619–626)

      Karyn L. Jarvis and Peter Majewski

      Version of Record online: 19 APR 2013 | DOI: 10.1002/ppap.201200143

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      A novel method has been developed to enable the amine coating of particles via plasma polymerization. An inductively coupled rotating plasma reactor and ethylenediamine monomer were utilized to successfully produce uniform nitrogen rich films. XPS characterization was undertaken to optimize nitrogen concentration while ToF-SIMS illustrated the distribution of nitrogen species over the particle surface.

    5. Chemical Modification of Carbon Nanofibers with Plasma of Acrylic Acid (pages 627–633)

      María G. Neira-Velázquez, Ernesto Hernández-Hernández, Luis F. Ramos-deValle, Carlos A. Ávila-Orta, Yibran A. Perera-Mercado, Silvia G. Solís-Rosales, Pablo González-Morones, Arturo Ponce-Pedraza, Miguel Ávalos-Borja, Rosa I. Narro-Céspedes and Pascual Bartolo-Pérez

      Version of Record online: 8 APR 2013 | DOI: 10.1002/ppap.201200122

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      Plasma treatment of CNFs using acrylic acid promotes their hydrophilic character. This new surface property of CNFs is a result of an increase of oxygen concentration at the surface of treated CNFs which has been demonstrated by XPS and EELS spectroscopy. A crosslinked nanocoating of polyacrilic acid was deposited on the surface on CNFs and part of this nanofilm was chemically bonded to the carbon atoms of the CNFs. The dispersion of plasma treated CNFs in water was stable.

    6. Organic–Inorganic Behavior of Plasma-Polymerized Hexamethyldisiloxane Films Studied by Electron and Photon Induced Ion Desorption (pages 634–640)

      Amanda G. Veiga, Yunier Garcia-Basabe, Ralph Schmittgens and Maria Luiza M. Rocco

      Version of Record online: 12 APR 2013 | DOI: 10.1002/ppap.201300007

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      This work shows the potentiality of the electron and photon stimulated ion desorption techniques for elucidating the organic or inorganic behavior of plasma-deposited films. The organic character is evidenced by high contribution of C2Hn+ species and the absence of higher mass fragments in the ESID spectrum, while the inorganic behavior is characterized by the presence of higher masses silicon ionic fragments. These differences were also observed by X-ray absorption.

    7. Deposition of a TMDSO-Based Film by a Non-Equilibrium Atmospheric Pressure DC Plasma Jet (pages 641–648)

      Xiaolong Deng, Anton Yu Nikiforov, Nathalie De Geyter, Rino Morent and Christophe Leys

      Version of Record online: 8 APR 2013 | DOI: 10.1002/ppap.201200166

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      In the present work, thin films are deposited using an atmospheric pressure nitrogen DC plasma jet with TMDSO as precursor with a maximum achievable deposition rate of 493nmmin−1. The film features are studied by profilometry, FTIR, and XPS. The amount of O2 in the feed gas and discharge power play an important role in the deposition process. It is found that the film chemical composition can be turned to more inorganic by variation of the discharge parameters.

    8. Formation of ROS and RNS in Water Electro-Sprayed through Transient Spark Discharge in Air and their Bactericidal Effects (pages 649–659)

      Zdenko Machala, Barbora Tarabova, Karol Hensel, Eva Spetlikova, Libusa Sikurova and Petr Lukes

      Version of Record online: 10 APR 2013 | DOI: 10.1002/ppap.201200113

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      Bactericidal effects of air plasma in water electro-sprayed through transient spark discharge are strongly related to the chemical effects induced in water. Productions of H2O2, nitrites, nitrates, and peroxynitrites are pH-dependent. The oxidative damage of bacteria increases with the solution acidity. Acidified nitrites interacting with H2O2, along with peroxynitrates seem the most important bactericidal ROS/RNS agents.

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