Development of a radio frequency atmospheric pressure plasma jet for diamond-like carbon coatings on stainless steel substrates

Sohbatzadeh, Farshad; Samadi, Omid; Siadati, S N; Etaati, G. R.; Asadi, Ehsan; Safari, R.

doi:10.1007/s00339-016-0414-z

Cited by 11 publications

(8 citation statements)

References 48 publications

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“…Several methods such as ion beam deposition; cathodic arc spray, pulsed laser ablation, argon ion sputtering, and plasmaenhanced chemical vapor deposition are used for the synthesis of the DLC layer at low pressure. Recently, the deposition of the DLC at atmospheric pressure has been demonstrated by several researchers [14][15][16][17][18]. The obtained results showed a successful deposition of DLC coating on different substrates.…”

Section: Introductionmentioning

confidence: 90%

Effect of methane content and the oscillating electric field between electrodes on atmospheric Ar/methane plasma jet and DLC coating deposition

Safari¹,

Sohbatzadeh²

2020

Plasma Sci. Technol.

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In this work, the effects of the methane gas flow and the internal oscillating electric field between electrodes on radio-frequency (RF) atmospheric pressure argon/methane plasma jet and process of diamond-like carbon (DLC) film deposition have been investigated. Properties of RF atmospheric Ar/methane plasma jet such as active species density, length, electron temperature, appearance and ionization process of argon/methane plasma jet are changed due to the changing of methane flow content and electric field vector and its gradient. With increasing methane flow, the formation of C 2 hydrocarbon and CH band content is decreased because injected electrical energy to a mixture of Ar/methane gases is insufficient to stabilize the ionization process of methane gas and the electrical-chemical reaction rate is decreased. With shortening the gas gap between two electrodes, electric field strength and its gradient are increased leading to more energy injection to the electron. Electrical-chemical reactions are strengthened leading to increasing the CH band content. These phenomena introduce the Ar/methane plasma jet in different modes causing to deposit the DLC film with different structures and properties. With using quartz glass and alumina ceramic as dielectric barriers tubes, RF atmospheric pressure Ar/ methane plasma jet has been used to deposit DLC coating in different modes. Increasing methane content and shortening the gas gap leads to decreasing sp3 bonded content and the quality of the deposited film.

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Section: Introductionmentioning

confidence: 90%

Effect of methane content and the oscillating electric field between electrodes on atmospheric Ar/methane plasma jet and DLC coating deposition

Safari¹,

Sohbatzadeh²

2020

Plasma Sci. Technol.

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“…Since plasma production was performed in ambient air, the effect of argon plasma species on the constituent elements of air and the collision between them produced species such as O (777.4 and 844.5 nm), NO x (200–300 nm), N 2 (336.9 nm), N + (357.6 nm),

{normalN}_{2}^{+}

(375.4 and 380.3 nm) and highly reactive species like OH (305–312 nm). The spectra corresponding to the atoms of the constituent elements of air in the wavelength range of 200–900 nm can be seen in Figure 3b (Deng et al, 2010; Li et al, 2013; Sohbatzadeh, Mirzanejhad, et al, 2016; Sohbatzadeh, Samadi, et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…In addition to the general advantages of atmospheric cold plasma, this plasma is not limited to discharge volume and can propagate over long distances from the electrode distance. Moreover, the use of argon as a base gas reduces the temperature in this plasma as much as possible and makes it more desirable to work with heat‐sensitive surfaces (Sohbatzadeh, Mirzanejhad, et al, 2016; Sohbatzadeh, Samadi, et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The green technology of cold plasma jet on the inactivation of Aspergillus flavus and the total aflatoxin level in pistachio and its quality properties

Esmaeili

Samani

Nazari

et al. 2022

J Food Process Engineering

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In this study, the effect of cold plasma on the reduction of Aspergillus flavus and total aflatoxin level in pistachio and some of its quality properties were investigated. Independent variables for reducing A. flavus and aflatoxin include plasma exposure time (5-10-15 min), power supply voltage (10-15-20 kV), argon to air composition (0-50-100%), and the dose of inoculated toxin. The most significant effect on reducing A. flavus compared to other variables was observed when the voltage of the power supply was increased, reaching the highest impact on A. flavus. According to air is cheap and available gas, it reduces plasma production costs. Therefore, in this study, a combination of air and argon gas was used. Also in this study, specific doses of aflatoxin were examined, which shows how much the target system can reduce the dose of aflatoxin. Optimization results showed the highest fungal reduction (5.14 log) after a plasma exposure time of 15 min, the voltage of 20 kV, 62.23% of argon in the gas mixture with air when the maximal aflatoxin (B1, 83.70%; B2, 74.36%; G1 41.39%, and G2, 50.74%;) reductions were obtained after a plasma exposure time of 15 min, 54.26% of argon in the gas mixture with air, and fixeddose of 20 ppb of aflatoxin. The results of the evaluation of pistachio characteristics show that there were no significant differences between the results of the control sample and the sample treated with cold plasma jet. So, this technique can be used to reduce A. flavus and aflatoxin with a reduced impact on the quality characteristics of pistachio kernels. Practical ApplicationFood contaminants are challenging the food industry due to the inefficiency of conventional disinfection techniques. Aflatoxin contamination is one of the significant challenges for the food industry since it has acute toxicological effects on consumers Cold plasma (CP) has attracted considerable attention as an emerging technique for the degradation of food contaminants. Elimination of aflatoxins increases the profits of industries and farmers related to pistachios or other nuts. This system can suggest to the food industries for increasing the health of their products.

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“…The application of gas flow is parallel to the electrical field generated in the ring electrodes. Different parameters control the propagation of plasma plume from the device exist, including the electrical field geometry, the gas flow conditions, and the source design [ 49 , 50 , 51 ].…”

Section: Atmospheric Pressure Plasma Technologymentioning

confidence: 99%

Atmospheric Pressure Plasma Surface Treatment of Polymers and Influence on Cell Cultivation

2021

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Atmospheric plasma treatment is an effective and economical surface treatment technique. The main advantage of this technique is that the bulk properties of the material remain unchanged while the surface properties and biocompatibility are enhanced. Polymers are used in many biomedical applications; such as implants, because of their variable bulk properties. On the other hand, their surface properties are inadequate which demands certain surface treatments including atmospheric pressure plasma treatment. In biomedical applications, surface treatment is important to promote good cell adhesion, proliferation, and growth. This article aim is to give an overview of different atmospheric pressure plasma treatments of polymer surface, and their influence on cell-material interaction with different cell lines.

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Development of a radio frequency atmospheric pressure plasma jet for diamond-like carbon coatings on stainless steel substrates

Cited by 11 publications

References 48 publications

Effect of methane content and the oscillating electric field between electrodes on atmospheric Ar/methane plasma jet and DLC coating deposition

Effect of methane content and the oscillating electric field between electrodes on atmospheric Ar/methane plasma jet and DLC coating deposition

The green technology of cold plasma jet on the inactivation of Aspergillus flavus and the total aflatoxin level in pistachio and its quality properties

Atmospheric Pressure Plasma Surface Treatment of Polymers and Influence on Cell Cultivation

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