Small size plasma tools for material processing at atmospheric pressure

Ionita, Eusebiu-Rosini; Ionita, Maria Daniela; Stancu, Elena; Teodorescu, Maximilian; Dinescu, Gheorghe

doi:10.1016/j.apsusc.2008.10.082

Cited by 36 publications

(12 citation statements)

References 10 publications

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“…Both sources can be operated at low radiofrequency power (around 100 W) in continuous Ar flow. These atmospheric pressure plasma sources were previously used for the surface treatment of polymers [ 41 ], decomposition of dye solutions [ 42 ] or functionalization of graphene suspensions [ 43 ]. These plasma sources work properly both in open atmosphere and completely immersed in various liquid media, such as nanocellulose water suspensions or graphene suspensions.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

et al. 2018

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Tailoring the surface properties of nanocellulose to improve the compatibility of components in polymer nanocomposites is of great interest. In this work, dispersions of nanocellulose in water and acetonitrile were functionalized by submerged plasmas, with the aim of increasing the quality of this reinforcing agent in biopolymer composite materials. Both the morphology and surface chemistry of nanocellulose were influenced by the application of a plasma torch and filamentary jet plasma in a liquid suspension of nanocellulose. Depending on the type of plasma source and gas mixture the surface chemistry was modified by the incorporation of oxygen and nitrogen containing functional groups. The treatment conditions which lead to nanocellulose based polymer nanocomposites with superior mechanical properties were identified. This work provides a new eco-friendly method for the surface functionalization of nanocellulose directly in water suspension, thus overcoming the disadvantages of chemical treatments.

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Section: Introductionmentioning

confidence: 99%

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

et al. 2018

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“…To overcome this shortcoming arrays of many individual plasma jets have been developed [18,19]. Another manner for achieving a uniform surface modification is the manipulation of the jet and/or the sample [20,21]. On the other hand, a localized treatment extended over a limited area is desirable for applications in medicine, where for example, only cancer cells have to be targeted without destroying the surrounding healthy tissue.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

218

144

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In this work we report the surface modification of different engineering polymers, such as, polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP) by an atmospheric pressure plasma jet (APPJ). It was operated with Ar gas using 10 kV, 37 kHz, sine wave as an excitation source. The aim of this study is to determine the optimal treatment conditions and also to compare the polymer surface modification induced by plasma jet with the one obtained by another atmospheric pressure plasma sourcethe dielectric barrier discharge (DBD). The samples were exposed to the plasma jet effluent using a scanning procedure, which allowed achieving a uniform surface modification. The wettability assessments of all polymers reveal that the treatment leads to reduction of more than 40• in the water contact angle (WCA). Changes in surface composition and chemical bonding were analyzed by x-ray photoelectron spectroscopy (XPS) and Fourier-Transformed Infrared spectroscopy (FTIR) that both detected incorporation of oxygen-related functional groups. Surface morphology of polymer samples was investigated by Atomic Force Microscopy (AFM) and an increase of polymer roughness after the APPJ treatment was found.The plasma-treated polymers exhibited hydrophobic recovery expressed in reduction of the O-content of the surface upon rinsing with water. This process was caused by the dissolution of low molecular weight oxidized materials (LMWOMs) formed on the surface as a result of the plasma exposure.

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“…First, the SSE value of a merged layer of an n L material could be increased using in situ modifications, such as atmospheric plasma treatments. [ 33 ] Second, efforts may be spent in determining methods for decreasing the LST of a high index material (NOA170 in this case) to promote improved merging quality.…”

Section: Figurementioning

confidence: 99%

Electrohydrodynamic Jet Printing of One‐Dimensional Photonic Crystals: Part I—An Empirical Model for Multi‐Material Multi‐Layer Fabrication

Afkhami

Iezzi

Hoelzle

et al. 2020

Adv Materials Technologies

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process requires deposition of consistent, uniform layers with a repeatable thickness distribution across multiple material classes. Different manufacturing methods such as spin or dip coating, [10] lithography, [11] doctor blading, [12] chemical vapor deposition, [13] and others have been used to fabricate thin-film devices. However, most of these methods are limited by substrate planarity, high temperatures, harsh chemistries, or the dissolution of previous layers by non-orthogonal solvents. [14] Furthermore, in certain situations, it is desirable to deposit a customized pattern or to selectively place components on an existing device structure without disturbing it. To address the challenges noted above, we examine an additive manufacturing (AM) approach and use it to realize vertically stacked, thin-film devices using multiple materials. AM technology in principle enables material deposition on nonplanar surfaces, by direct addition of material on existing topographies, without requiring cleanroom facilities and the use of masking steps more commonly used with lithography, and less material waste. Inkjet printing has been studied extensively for the creation of multimaterial, thin-film devices with demonstrated transistors [15-17] and optical sensors. [18] The thermal or piezo-driven excitation [19] used to deposit materials in a liquid phase in inkjet printing limits the achievable spatial resolution to larger than 20 µm. Furthermore, high viscosity inks (>50 cP) necessary for certain applications cannot be printed using inkjet technology. [20] Electrohydrodynamic jet (e-jet) printing is a solution-based fabrication technique enabling thin-film fabrication and patterning without the planarity restrictions of lithography and other subtractive processes. Compared to inkjet technology, e-jet printing has a much higher spatial resolution (0.05-30 µm), comparable to the resolution of lithographic processes, [20,21] while also providing a high degree of freedom in creating customized patterns. Complex structures can be fabricated with high controllability and precision in desired locations from the micro-to nanoscale. E-jet is also capable of depositing a wide range of fluid viscosities from 10 0-10 5 cP, several orders of magnitude larger than that of inkjet printing. [19] This further enables

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Small size plasma tools for material processing at atmospheric pressure

Cited by 36 publications

References 10 publications

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

Treatment of Nanocellulose by Submerged Liquid Plasma for Surface Functionalization

Surface modification of polymeric materials by cold atmospheric plasma jet

Electrohydrodynamic Jet Printing of One‐Dimensional Photonic Crystals: Part I—An Empirical Model for Multi‐Material Multi‐Layer Fabrication

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