Plasma Processes and Polymers
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Online ISSN: 1612-8869
Recently Published Articles
- Time-resolved imaging of electrical discharge development in multiple bubbles immersed in water
Yalong Tu, Yubin Xian, Yong Yang, Xinpei Lu and Yuan Pan
Version of Record online: 17 MAR 2017 | DOI: 10.1002/ppap.201600259
The formation and development of plasma in multiple air bubbles submerged in water is investigated using a pin-pin electrode system. The discharge dynamics with different bubble-bubble and bubble-electrode distance is investigated using a 300 000 frame per second high-speed charge-coupled device (CCD) camera. It is observed that the proximity of bubbles and electrodes is crucial for the breakdown process. Depending on the position of the bubbles and electrodes, the breakdown could be categorized into three modes: (1) the axial mode, where the streamer propagates along the axis of the bubbles; (2) the surface mode, where the streamer propagates along the inner curved surface of the bubbles; and (3) the hybrid mode, where the streamer propagates both along the axis and the inner surface simultaneously. For larger electrode gap, the discharge only initiates at the tip of the electrode, and does not propagate into the bubble.
- Analysis of hydroxyl radical formation in a gas-liquid electrical discharge plasma reactor utilizing liquid and gaseous radical scavengers
Kevin C. Hsieh, Robert J. Wandell, Stefan Bresch and Bruce R. Locke
Version of Record online: 16 MAR 2017 | DOI: 10.1002/ppap.201600171
A pulsed electrical discharge forming a plasma channel that propagates along the interface between an argon gas phase and a liquid water film generates hydroxyl radicals that can react with compounds from both the gas and liquid. These chemical probe reactions are used to determine the maximum efficiency for hydroxyl radical generation in this system.
- Ultra-small CuO nanoparticles with tailored energy-band diagram synthesized by a hybrid plasma-liquid process
Tamilselvan Velusamy, Anna Liguori, Manuel Macias-Montero, Dilli Babu Padmanaban, Darragh Carolan, Matteo Gherardi, Vittorio Colombo, Paul Maguire, Vladimir Svrcek and Davide Mariotti
Version of Record online: 9 MAR 2017 | DOI: 10.1002/ppap.201600224
We report a one-step green, microplasma-based synthesis of CuO NPs in ethanol. This simple plasma liquid interaction produces device grade and well dispersed NPs within a few minutes. Furthermore, NPs are characterized without any post-synthesis treatments and determined their energy band diagram for exploring their functionality in third generation solar cells.
- Ion Energy and Angular Distribution in Biased Inductively Coupled Ar/O2 Discharges by Using a Hybrid Model
De-Qi Wen, Yu-Ru Zhang, Michael A. Lieberman and You-Nian Wang
Version of Record online: 3 MAR 2017 | DOI: 10.1002/ppap.201600100
Inductively coupled plasma (ICP) has played critical roles for etching, depositing, and materials surface modification etc. In this work, we extend the previous hybrid model used for electropositive argon discharge to electronegative argon/oxygen discharge. This model could quickly estimate all kinds of species densities in the bulk plasma, ion energy, and angular distribution on the biased electrode.
- Hydrophilization of outer and inner surfaces of Poly(vinyl chloride) tubes using surface dielectric barrier discharges generated in ambient air plasma
Oleksandr Galmiz, David Pavliňák, Miroslav Zemánek, Antonin Brablec and Mirko Černák
Version of Record online: 28 FEB 2017 | DOI: 10.1002/ppap.201600220
An atmospheric pressure ambient air plasma technique is developed for technically simple treatment of inner and/or outer surfaces of plastic tubes and other hollow dielectric bodies. This technique is based on a specific type of surface dielectric barrier discharge generating visually diffuse plasma layers along the treated dielectric surfaces using water-solution electrodes. It shows that the plasma treatment changes the surface chemical composition and properties of the PVC material. The oxidation process is clearly seen on XPS spectra as an increase of the relevant components. The aging effect on the treated PVC surface is studied.