Glass Coating Removal by Atmospheric Oxygen Plasma

Coatings such as Cr, Ni, Ti, and SiO2/SnO2 on solar-control and low-emissivity (low-E) glasses are commonly used in the energy efficient glass windows. However, coloring in the re-manufactured glass panels using recycled window glasses resulting from the coatings reduces the glass transparency significantly. Traditional ways to remove coatings by manual wheels and pneumatic removal machines are labor intense and slow processes. In this study a new way to remove the coatings on recycled coated glasses was investigated. The Ultra Violet/Visible/Infrared (UV/VIS/IR) spectra and Secondary Electron Microscope (SEM) pictures were taken before and after 30s. atmospheric pressure oxygen plasma treatments. It was confirmed that the atmospheric oxygen plasma treatment is a fast, efficient, and low pollution way to remove the coatings before the remanufacture of recycled glasses. Other than the physical sputtering off the coatings from the plasma, there are many excited oxygen species in the plasma which effectively react to the coating and the products are then removed.

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Surface Wettability Tuning of Acrylic Resin Photoresist and Its Aging Performance

Sensors ◽

10.3390/s21144866 ◽

2021 ◽

Vol 21 (14) ◽

pp. 4866

Author(s):

Yingying Dou ◽

Fahong Li ◽

Biao Tang ◽

Guofu Zhou

Keyword(s):

Oxygen Plasma ◽

Ultra Violet ◽

Acrylic Resin ◽

Surface Wettability ◽

Ozone Treatment ◽

Oxygen Plasma Treatment ◽

Hydrophilic Modification ◽

Before And After ◽

Effect Of Oxygen ◽

Aging Performance

Photoresist is the key material in the fabrication of micropatterns or microstructures. Tuning the surface wettability of photoresist film is a critical consideration in its application of microfluidics. In this work, the surface wettability tuning of acrylic resin photoresist by oxygen plasma or ultra-violet/ozone, and its aging performance in different atmospheres, were systematically studied. The chemical and physical characterizations of the surfaces before and after modification show a dramatic decrease in the C–C group and increase in surface roughness for oxygen plasma treatment, while a decrease of the C–C group was found for the UV/ozone treatment. The above difference in the surface tuning mechanism may explain the stronger hydrophilic modification effect of oxygen plasma. In addition, we found an obvious fading of the wettability tuning effect with an environment-related aging speed, which can also be featured by the decrease of the C–C group. This study demonstrates the dominated chemical and physical changes during surface wettability tuning and its aging process, and provides basis for surface tuning and the applications in microfluidics.

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Preparation of Silver-Plated Para-Aramid Fiber by Employing Low-Temperature Oxygen Plasma Treatment and Dopamine Functionalization

Coatings ◽

10.3390/coatings9100599 ◽

2019 ◽

Vol 9 (10) ◽

pp. 599 ◽

Cited By ~ 1

Author(s):

Zhenhua Sun ◽

Yanfen Zhou ◽

Wenyue Li ◽

Shaojuan Chen ◽

Shihua You ◽

...

Keyword(s):

Electrical Conductivity ◽

Silver Nanoparticles ◽

Plasma Treatment ◽

Electrical Resistance ◽

Oxygen Plasma ◽

Attenuated Total Reflection ◽

Oxygen Plasma Treatment ◽

Washing Fastness ◽

Before And After ◽

Electroless Silver Plating

Direct electroless silver plating of para-aramid (PPTA) is difficult due to its extremely low surface chemical energy. In order to facilitate the deposition of silver nanoparticles and to enhance the washing fastness, oxygen plasma treatment and dopamine modification were conducted before silver plating of PPTA fibers. Various techniques including scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray diffractometer (XRD) and thermogravimetric analyzer (TGA) were used to characterize the surface morphology, chemical composition and thermal stability of the silver-plated PPTA fibers. Electrical resistance and silver content of the silver-coated PPTA fibers before and after standard washing were also studied. The results showed that silver nanoparticles were successfully coated onto the surface of PPTA fibers with and without plasma treatment, but the coating continuity and the electrical conductivity of the silver-coated PPTA fibers were greatly enhanced with the assistance of plasma treatment. It was also demonstrated that the washing fastness of silver-coated PPTA fibers was improved after plasma treatment as indicated by electrical resistance and continuity of the silver nanoparticles after various washing cycles. It was found that the electrical resistance of plasma-treated PPTA-PDA/Ag fibers prepared at an AgNO3 concentration of 20 g/L reached 0.89 Ω/cm and increased slightly to 0.94 Ω/cm after 10 standard washing cycles. The silver-coated PPTA fibers also showed stable electrical conductivity under 250 repeated stretching-releasing cycles at a strain of 3%.

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Electrohydrodynamic Atomization of Graphene Nano-Suspension

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.868.236 ◽

2017 ◽

Vol 868 ◽

pp. 236-241

Author(s):

Da Zhi Wang ◽

Li Feng ◽

Yun Long Wei ◽

Jia Chang Cao ◽

Xin Yu Chen ◽

...

Keyword(s):

Plasma Treatment ◽

Sheet Resistance ◽

Oxygen Plasma ◽

Oxygen Plasma Treatment ◽

Deposition Method ◽

Pdms Substrate ◽

Graphene Films ◽

Electrohydrodynamic Atomization ◽

Before And After

In this paper, graphene nanosuspension was spray deposited using electrohydrodynamic atomization (EHDA) technique, and the polydimethylsiloxane (PDMS) was used as the substrate during the EHDA process. The effect of the PDMS substrate before and after oxygen plasma treatment on the characteristics of EHDA was examined. A cone-jet mode of the EHDA of graphene nanosuspension was obtained using the oxygen plasma treated PDMS substrate. In addition graphene films were deposited on the oxygen plasma treated PDMS at different working distances. The lowest sheet resistance of the graphene films is 127Ω·sq-1. Furthermore, graphene lines at the range of 30μm-170μm were fabricated using the template assisted EHDA deposition method.

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Structural Analysis of Kevlar Fabric Treated with Oxygen Plasma

Fibres and Textiles in Eastern Europe ◽

10.5604/01.3001.0013.9024 ◽

2020 ◽

Vol 28 (3(141)) ◽

pp. 79-83

Author(s):

Talita Galvão Targino ◽

Rayane Dantas da Cunha ◽

João Freire de Medeiros Neto ◽

Ricardo Alex Dantas da Cunha ◽

Thércio Henrique de Carvalho Costa ◽

...

Keyword(s):

Oxygen Plasma ◽

Constant Pressure ◽

Treatment Time ◽

Current Source ◽

Surface Characteristics ◽

Oxygen Plasma Treatment ◽

Optimal Parameters ◽

Experimental Conditions ◽

Before And After ◽

Physical Changes

The purpose of this work was to study the effects of low-pressure oxygen plasma treatment on the surface characteristics of kevlar fabric. For comparison purposes, samples treated with oxygenated plasma were prepared and characterised under different experimental conditions, i.e. a treatment time variation of 10, 30 and 60 minutes under a constant pressure of 4 mBar, using a pulsed current source. We analysed the effects of chemical and physical changes to the surface of the material aiming at improved hydrophilicity attributed to the formation of roughness on the surface of fibres, thus obtaining optimal parameters for future works. Changes in the chemical composition of the surface as well as in the superficial roughness of fibres before and after treatment were determined by FTIR, TGA, XRD and wettability testing. SEM was used as a complementary technique to monitor the changes triggered by the procedures using oxygen plasma.

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Activation of EL-4 T-cells by irradiation with atmospheric oxygen plasma

Japanese Journal of Applied Physics ◽

10.35848/1347-4065/ab83db ◽

2020 ◽

Vol 59 (SJ) ◽

pp. SJJF03

Author(s):

Sitti Subaedah ◽

Haruka Uematsu ◽

Nobuya Hayashi

Keyword(s):

T Cells ◽

Oxygen Plasma ◽

Atmospheric Oxygen

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High Breakdown Voltage GaN HEMT Device Fabricated on Self-Standing GaN Substrate

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.347-350.1535 ◽

2013 ◽

Vol 347-350 ◽

pp. 1535-1539

Author(s):

Jian Jun Zhou ◽

Liang Li ◽

Hai Yan Lu ◽

Ceng Kong ◽

Yue Chan Kong ◽

...

Keyword(s):

Plasma Treatment ◽

Breakdown Voltage ◽

Oxygen Plasma ◽

Cutoff Frequency ◽

Chemical Vapor ◽

Current Gain ◽

Organic Chemical ◽

Oxygen Plasma Treatment ◽

Gan Hemt ◽

High Breakdown Voltage

In this letter, a high breakdown voltage GaN HEMT device fabricated on semi-insulating self-standing GaN substrate is presented. High quality AlGaN/GaN epilayer was grown on self-standing GaN substrate by metal organic chemical vapor deposition. A 0.8μm gate length GaN HEMT device was fabricated with oxygen plasma treatment. By using oxygen plasma treatment, gate forward working voltage is increased, and a breakdown voltage of more than 170V is demonstrated. The measured maximum drain current of the device is larger than 700 mA/mm at 4V gate bias voltage. The maximum transconductance of the device is 162 mS/mm. In addition, high frequency performance of the GaN HEMT device is also obtained. The current gain cutoff frequency and power gain cutoff frequency are 19.7 GHz and 32.8 GHz, respectively. A high fT-LG product of 15.76 GHzμm indicating that homoepitaxy technology is helpful to improve the frequency performance of the device.

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An Assessment of Surface Treatments for Adhesion of Polyimide Thin Films

Polymers ◽

10.3390/polym13121955 ◽

2021 ◽

Vol 13 (12) ◽

pp. 1955

Author(s):

Marco Cen-Puc ◽

Andreas Schander ◽

Minerva G. Vargas Gleason ◽

Walter Lang

Keyword(s):

Flexible Electronics ◽

Oxygen Plasma ◽

Reactive Ion Etching ◽

Peel Test ◽

Scratch Test ◽

Peel Strength ◽

Surface Treatments ◽

Oxygen Plasma Treatment ◽

Polyimide Films ◽

Ion Etching

Polyimide films are currently of great interest for the development of flexible electronics and sensors. In order to ensure a proper integration with other materials and PI itself, some sort of surface modification is required. In this work, microwave oxygen plasma, reactive ion etching oxygen plasma, combination of KOH and HCl solutions, and polyethylenimine solution were used as surface treatments of PI films. Treatments were compared to find the best method to promote the adhesion between two polyimide films. The first selection of the treatment conditions for each method was based on changes in the contact angle with deionized water. Afterward, further qualitative (scratch test) and a quantitative adhesion assessment (peel test) were performed. Both scratch test and peel strength indicated that oxygen plasma treatment using reactive ion etching equipment is the most promising approach for promoting the adhesion between polyimide films.

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