Marangoni flows induced by atmospheric-pressure plasma jets

Berendsen, Cwj Christian; Veldhuizen, van Em Eddie; Kroesen, Gmw Gerrit; Darhuber, Anton A.

doi:10.1088/0022-3727/48/2/025203

Cited by 13 publications

(6 citation statements)

References 79 publications

(85 reference statements)

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“…The interaction between an atmospheric pressure plasma jet and a liquid thin layer has been studied in the past and it was found that several effects can play a role. Firstly, the plasma exposure can cause changes in the surface tension of the liquid layer which can induce Marangoni flows 26 . The surface can also be deformed when the plasma is not ignited and only a gas jet is impinges the liquid layer 27 .…”

Section: Resultsmentioning

confidence: 99%

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Slikboer

Sobota

García-Caurel

et al. 2020

Sci Rep

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Pockels-based Mueller polarimetry is presented as a novel diagnostic technique for studying time and space-resolved and in-situ the interaction between an organic sample (a layer of onion cells) and non-thermal atmospheric pressure plasma. The effect of plasma is complex, as it delivers electric field, radicals, (UV) radiation, non-uniform in time nor in space. This work shows for the first time that the plasma-surface interaction can be characterized through the induced electric field in an electrooptic crystal (birefringence caused by the Pockels effect) while at the same moment the surface evolution of the targeted sample is monitored (depolarization) which is attached to the crystal. As Mueller polarimetry allows for separate detection of depolarization and birefringence, it is possible to decouple the entangled effects of the plasma. In the sample three spatial regions are identified where the surface evolution of the sample differs. This directly relates to the spatial in-homogeneity of the plasma at the surface characterized through the detected electric field. The method can be applied in the future to investigate plasma-surface interactions for various targets ranging from bio-films, to catalytic surfaces and plastics/polymers.

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Section: Resultsmentioning

confidence: 99%

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Slikboer

Sobota

García-Caurel

et al. 2020

Sci Rep

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“…Diffusive plasma attachments at the interface tend to give rise to transport best characterized as simple diffusion, essentially a slow process. On the other hand, streamer-type microdischarges induce rapid transport of species into the solution due to Marangoni flows driven by heat and concentration gradients at the interface (see figure 4) [35,52]. The contrasting effects of the two discharge types show the true difficulty in scaling up.…”

Section: The Problem Of the Plasma Liquid Interface General Considera...mentioning

confidence: 99%

Towards high throughput plasma based water purifiers: design considerations and the pathway towards practical application

Foster

Mujovic

Groele

et al. 2018

J. Phys. D: Appl. Phys.

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The confluence of societally impacting forces such as climate change, overpopulation, and overdevelopment are stressing freshwater reserves (see figure 1) [1,2]. Beyond issues of scarcity, fresh water quality is increasingly affected by pollution derived from agriculture and industry. Water reuse addresses water scarcity [3][4][5][6]. By water reuse, we refer to the use of technology to directly or indirectly recycle treated wastewater effluent for potable and non-potable applications, thereby augmenting existing water supplies. In the US alone, water reuse, if implemented, could meet up to 30% of the current public water supply demand [7]. Advanced water treatment technologies are required to reduce contaminant levels in reused water to acceptable values [8]. These same technologies have the potential to also remove those contaminants not addressed by conventional water treatment systems. Advanced oxidation processes (AOPs) have been identified as the basis for the treatment of difficult water, addressing contaminants that are difficult to strip, absorb or biodegrade conventionally

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“…Moreover, Berendsen et al reported that plasma-liquid chemical interaction at the contact point induced liquid oxidation, leading to an increase in the local surface tension. 38) On the basis of this information, the chemical reactions around the plasmaliquid contact point may be an important factors. Therefore, we replaced the liquid target with the KI-starch gel reagent to visualize the 2-D oxidation reactions with the aim of considering the mechanisms behind the driving forces.…”

Section: Resultsmentioning

confidence: 99%

Effects of surrounding gas on plasma-induced downward liquid flow

Kawasaki¹,

Nishida²,

Uchida³

et al. 2020

Jpn. J. Appl. Phys.

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Understanding the mechanisms behind plasma-induced liquid flow is important for the transport of reactive species in liquid. In this study, we studied the effects of the surrounding gas compositions of a plasma-jet on the plasma-induced downward liquid flow using particle image velocimetry. Nitrogen (N 2 ) and oxygen (O 2 ) mixtures in different mixing ratios were supplied as surrounding gas around a helium (He) plasma jet at a constant flow rate. The results clearly indicated that O 2 in the surrounding gas plays a key role in enhancing the downward flow. Increasing the O 2 concentration increased the downward flow in the depth direction. An emission spectroscopy analysis suggested that reactive species related to excited atomic O were considered to be important for inducing downward flows. The relationship between the downward flows and oxidation reactions on a liquid target were discussed to determine the reasons responsible for the driving forces.

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Marangoni flows induced by atmospheric-pressure plasma jets

Cited by 13 publications

References 79 publications

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

In-situ monitoring of an organic sample with electric field determination during cold plasma jet exposure

Towards high throughput plasma based water purifiers: design considerations and the pathway towards practical application

Effects of surrounding gas on plasma-induced downward liquid flow

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