Atmospheric nonequilibrium mini-plasma jet created by a 3D printer

Takamatsu, Takeichiro; Kawano, Hiroaki; Miyahara, Hidekazu; Azuma, Takeshi; Okino, Akitoshi

doi:10.1063/1.4928034

Cited by 8 publications

(3 citation statements)

References 31 publications

(18 reference statements)

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“…By contrast, a chemical scavenger is a compound that reacts with the reactive species in question and creates a new chemical compound.) These authors concluded that TPC was not selective for 1 O 2 and that other reactive oxygen species were contributing to the formation of the adduct [25]. In a different series of experiments, Zhu utilized TEMP in the presence of L-Histidine and 3-(10-(2-carboxy-ethyl)anthracen-9-Yl)-propionic acid (ADPA) as 1 O 2 scavengers [26].…”

Section: Introductionmentioning

confidence: 99%

Production of TEMPO by O atoms in atmospheric pressure non-thermal plasma–liquid interactions

Elg¹,

Yang²,

Graves

2017

J. Phys. D: Appl. Phys.

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Section: Introductionmentioning

confidence: 99%

Production of TEMPO by O atoms in atmospheric pressure non-thermal plasma–liquid interactions

Elg¹,

Yang²,

Graves

2017

J. Phys. D: Appl. Phys.

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“…To fabricate a plasma jet body with a complex shape, a metal 3D printer was used. 3Dprinting technology has attracted increasing attention in manufacturing, including its use in plasma systems, due to its low cost and high flexibility [17][18][19]. Recently, a plasma jet for an endoscope with a diameter of approximately 3 mm produced by a metal 3D printer has been reported [20].…”

Section: Introductionmentioning

confidence: 99%

Plasma Gas Temperature Control Performance of Metal 3D-Printed Multi-Gas Temperature-Controllable Plasma Jet

et al. 2021

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The aim of the study was to design and build a multi-gas temperature-controllable plasma jet that can control the gas temperature of plasmas with various gas species, and evaluated its temperature control performance. In this device, a fluid at an arbitrary controlled temperature is circulated through the plasma jet body. The gas exchanges heat with the plasma jet body to control the plasma temperature. Based on this concept, a complex-shaped plasma jet with two channels in the plasma jet body, a temperature control fluid (TCF) channel, and a gas channel was designed. The temperature control performance of nitrogen gas was evaluated using computational fluid dynamics analysis, which found that the gas temperature changed proportionally to the TCF temperature. The designed plasma jet body was fabricated using metal 3D-printer technology. Using the fabricated plasma jet body, stable plasmas of argon, oxygen, carbon dioxide, and nitrogen were generated. By varying the plasma jet body temperature from −30 °C to 90 °C, the gas temperature was successfully controlled linearly in the range of 29–85 °C for all plasma gas species. This is expected to further expand the range of applications of atmospheric low temperature plasma and to improve the plasma treatment effect.

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“…In addition, since most of the previously reported LTP devices were only able to produce LTP from argon (Ar) or helium (He), it would be difficult to use them to produce ROS and reactive nitrogen species stably in the gastrointestinal tract, which is an enclosed space. Takamatsu et al established a method for producing a smaller LTP source that can use various gases [22], and they succeeded in miniaturizing the tip of the plasma source (diameter: 3.7 mm) by using a 3D printer [23]. This new device can produce plasma not only from Ar and He, but also from oxygen (0 ), carbon dioxide (CO ), and nitrogen (N ).…”

Section: Introductionmentioning

confidence: 99%

Endoscopic Hemostasis in Porcine Gastrointestinal Tract Using CO2 Low-Temperature Plasma Jet

Kurosawa

Takamatsu

Kawano

et al. 2019

Journal of Surgical Research

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Background: Recently, atmospheric Low Temperature Plasma(LTP) has attracted attention as a novel medical tool that might be useful for achieving hemostasis. However, conventional plasma sources are too big for use with endoscopes, and the efficacy of LTP for achieving hemostasis in cases of gastrointestinal bleeding is difficult to investigate. In this study, to solve the problem, we developed a 3D printed LTP jet which has a diameter of 2.8 mm and metal body for endoscopic use And the characteristics, hemostasis efficacy and safety were investigated. Materials and Methods: As investigation of the basic characteristics of the developed plasma jet, the electron densities, gas temperatures, and reactive species were measured by emission spectroscopy and thermocouple To evaluate the efficacy of such hemostatic treatment, porcine gastrointestinal bleeding was treated with the device. In addition, to investigate the safety of such treatment, the CO LTP-treated tissue was compared with tissue that was treated with clipping-or argon plasma coagulation (APC)-based hemostasis for 5 days, and hematoxylin and eosin staining was used to evaluate tissue damage in the treated regions. Results: The measurement of emission spectroscopy, the power, and the electron density of various gas plasmas suggested that a high density (10 cm) LTP of CO was generated by the LTP jet and the gas temperature was 41.5°C at 3 mm from the outlet ofLTP. he CO LTP achieved hemostasis of oozing blood with 0±2 s. In addition, the CO LTP gave earlier recovery than clipping-or APC-based hemostasis, and the treated regions ha no damage by the CO LTP treatment. Conclusions: These results indicated that the developed LTP plasma jet has potential to be used for endoscopic hemostasis.

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Atmospheric nonequilibrium mini-plasma jet created by a 3D printer

Cited by 8 publications

References 31 publications

Production of TEMPO by O atoms in atmospheric pressure non-thermal plasma–liquid interactions

Production of TEMPO by O atoms in atmospheric pressure non-thermal plasma–liquid interactions

Plasma Gas Temperature Control Performance of Metal 3D-Printed Multi-Gas Temperature-Controllable Plasma Jet

Endoscopic Hemostasis in Porcine Gastrointestinal Tract Using CO2 Low-Temperature Plasma Jet

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