Cold atmospheric plasma has selective anticancer effects, while limited penetration depth and lifetime of reactive species restrict its usage. Herein, we adopt saline and hydrogel as carriers of plasma‐induced reactive species, and link reactive species accumulation, attenuation, storage, and slow‐release to anticancer effects of plasma‐activated media. Results reveal that plasma‐activated hydrogel (PAH) has a sustained anticancer effect and prolongs the storage duration of reactive species, thus causing more intracellular oxidative species accumulation and inducing melanoma cell apoptosis with reactive species continuously released to cell medium. In contrast, plasma‐activated saline has an attenuated anticancer effect with decline in reactive species. Therefore, PAH serves as a useful reactive species carrier and has potential for further anticancer research.
{"title":"The sustained and effective anticancer effect of plasma‐activated hydrogel on melanoma cells","authors":"Shengduo Xu, Shiyao Wang, Tong Wu, Jishen Zhang, Xixi Jing, Jiao Lin, Hao Zhang, Dingxin Liu, Xianzhen Jin, Zifeng Wang, Xiaohua Wang, Mingzhe Rong","doi":"10.1002/ppap.202400004","DOIUrl":"https://doi.org/10.1002/ppap.202400004","url":null,"abstract":"Cold atmospheric plasma has selective anticancer effects, while limited penetration depth and lifetime of reactive species restrict its usage. Herein, we adopt saline and hydrogel as carriers of plasma‐induced reactive species, and link reactive species accumulation, attenuation, storage, and slow‐release to anticancer effects of plasma‐activated media. Results reveal that plasma‐activated hydrogel (PAH) has a sustained anticancer effect and prolongs the storage duration of reactive species, thus causing more intracellular oxidative species accumulation and inducing melanoma cell apoptosis with reactive species continuously released to cell medium. In contrast, plasma‐activated saline has an attenuated anticancer effect with decline in reactive species. Therefore, PAH serves as a useful reactive species carrier and has potential for further anticancer research.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"30 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141769771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Liu, Jianping Liang, Hongli Wang, Ke Lu, Zikai Zhou, Hongwei Shen, Yihao Xu, Kun Yang, Dezheng Yang
In this study, gas–liquid discharge plasma excited by nanosecond pulsed voltage is used to efficiently remove tiamulin (TIA) from water. The discharge produces a large number of reactive species (H2O2, OH radicals, NO3−, etc.) that can attack the TIA molecules. The effects of peak pulse voltage, initial TIA concentration, gas composition, and the addition of ferrous sulfate and persulfate on TIA removal were mainly investigated. The results showed that the oxygen plasma could approach 100% removal within 30 min of treatment time. The addition of the catalyst increased the TIA removal efficiency by approximately 15% during the 10‐min discharge treatment time. The toxicity of 12 intermediates was analyzed and the degradation mechanism of TIA was investigated.
在这项研究中，利用纳秒脉冲电压激发的气液放电等离子体可有效去除水中的替姆林（TIA）。放电产生的大量活性物种（H2O2、OH 自由基、NO3- 等）可攻击 TIA 分子。主要研究了峰值脉冲电压、TIA 初始浓度、气体成分以及硫酸亚铁和过硫酸盐的添加对去除 TIA 的影响。结果表明，氧等离子体可在 30 分钟的处理时间内达到 100% 的去除率。在 10 分钟的放电处理时间内，催化剂的加入使 TIA 的去除率提高了约 15%。分析了 12 种中间产物的毒性，并研究了 TIA 的降解机理。
{"title":"A study of tiamulin removal by nanosecond pulsed gas–liquid discharge underwater","authors":"Yang Liu, Jianping Liang, Hongli Wang, Ke Lu, Zikai Zhou, Hongwei Shen, Yihao Xu, Kun Yang, Dezheng Yang","doi":"10.1002/ppap.202400013","DOIUrl":"https://doi.org/10.1002/ppap.202400013","url":null,"abstract":"In this study, gas–liquid discharge plasma excited by nanosecond pulsed voltage is used to efficiently remove tiamulin (TIA) from water. The discharge produces a large number of reactive species (H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>, OH radicals, NO<jats:sub>3</jats:sub><jats:sup>−</jats:sup>, etc.) that can attack the TIA molecules. The effects of peak pulse voltage, initial TIA concentration, gas composition, and the addition of ferrous sulfate and persulfate on TIA removal were mainly investigated. The results showed that the oxygen plasma could approach 100% removal within 30 min of treatment time. The addition of the catalyst increased the TIA removal efficiency by approximately 15% during the 10‐min discharge treatment time. The toxicity of 12 intermediates was analyzed and the degradation mechanism of TIA was investigated.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"7 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141745912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The development of a nonconventional nitrogen fertilizer, which can be fixed in agricultural fields using decentralized renewable energy sources, presents a feasible solution for sustainable on‐site nitrogen fixation and fertilization. This study focuses on plasma‐generated dinitrogen pentoxide (N2O5) as a prospective mediator for the on‐site nitrogen fertilization, allowing nitrogen fertilization directly into culture media. Basal dinitrogen pentoxide fertilization demonstrated almost 100% dinitrogen pentoxide dissolution efficiency as nitrate in a culture medium and nitrogen fertilization effect on plant growth without explicit symptoms of damage. Top‐dressing of dinitrogen pentoxide was also an efficient method for transferring nitrogen into the soil as nitrate, which improved plant growth and suppressed nitrogen deficiency symptoms, while overdose caused adverse effects.
{"title":"Plasma nitrogen fixation for plant cultivation with air‐derived dinitrogen pentoxide","authors":"Shouki Takeshi, Keisuke Takashima, Shota Sasaki, Atsushi Higashitani, Toshiro Kaneko","doi":"10.1002/ppap.202400096","DOIUrl":"https://doi.org/10.1002/ppap.202400096","url":null,"abstract":"The development of a nonconventional nitrogen fertilizer, which can be fixed in agricultural fields using decentralized renewable energy sources, presents a feasible solution for sustainable on‐site nitrogen fixation and fertilization. This study focuses on plasma‐generated dinitrogen pentoxide (N<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>) as a prospective mediator for the on‐site nitrogen fertilization, allowing nitrogen fertilization directly into culture media. Basal dinitrogen pentoxide fertilization demonstrated almost 100% dinitrogen pentoxide dissolution efficiency as nitrate in a culture medium and nitrogen fertilization effect on plant growth without explicit symptoms of damage. Top‐dressing of dinitrogen pentoxide was also an efficient method for transferring nitrogen into the soil as nitrate, which improved plant growth and suppressed nitrogen deficiency symptoms, while overdose caused adverse effects.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"64 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alex Destrieux, Williams M. Caceres Ferreira, Zachary Costantino, Jacopo Profili, Gaetan Laroche
The present work investigates the etching of coated polytetrafluoroethylene (PTFE) films using an atmospheric pressure dielectric barrier discharge operating in nitrogen in a filamentary regime. For different treatment durations, the optical emission spectra were recorded over time. Most of the emissions are attributed to the N2 second positive system. The presence of CN is also observed, and its emissions rise with the exposure time of PTFE. This rise is attributed to the density of CN produced. The X‐ray photoelectron spectroscopy surface characterization suggests two etching regimes. This is linked with a change in slope in the intensity evolution of the optical emissions of the CN. At longer times, a fluorinated deposit on the electrode is observed, confirming a different nature of the etched material.
{"title":"Optical emission characterization of an atmospheric pressure dielectric barrier discharge in nitrogen: Evolution of CN emissions during PTFE etching","authors":"Alex Destrieux, Williams M. Caceres Ferreira, Zachary Costantino, Jacopo Profili, Gaetan Laroche","doi":"10.1002/ppap.202400036","DOIUrl":"https://doi.org/10.1002/ppap.202400036","url":null,"abstract":"The present work investigates the etching of coated polytetrafluoroethylene (PTFE) films using an atmospheric pressure dielectric barrier discharge operating in nitrogen in a filamentary regime. For different treatment durations, the optical emission spectra were recorded over time. Most of the emissions are attributed to the N<jats:sub>2</jats:sub> second positive system. The presence of CN is also observed, and its emissions rise with the exposure time of PTFE. This rise is attributed to the density of CN produced. The X‐ray photoelectron spectroscopy surface characterization suggests two etching regimes. This is linked with a change in slope in the intensity evolution of the optical emissions of the CN. At longer times, a fluorinated deposit on the electrode is observed, confirming a different nature of the etched material.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"2 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kristína Trebulová, Inna Orel, Jean‐Michel Pouvesle, Eric Robert, Amaury Rouillard, Augusto Stancampiano, Jan Hrudka, Přemysl Menčík, Zdenka Kozáková, Zuzana Měšťánková, Darina Kužmová, Ivana Paličková, Alois Čížek, František Krčma
This work focuses on the antimycotic effects of the plasma gun as a potential tool for the treatment of superficial infections. Candida glabrata was chosen as a model microorganism. The preliminary tests have been done on the agar plates to establish the basic plasma parameters. To render this research more appropriate to the real application, more complex inoculation substrates, pork skin and 3D‐printed models of the dog ear canal have been used. The results of this work confirm the high efficiency of cold plasma in the inhibition of yeasts on different surfaces and will lead to further experiments.
这项研究的重点是等离子枪的抗真菌效果，它是治疗浅表感染的一种潜在工具。我们选择了白色念珠菌作为模型微生物。在琼脂平板上进行了初步测试，以确定等离子体的基本参数。为了使这项研究更适合实际应用，使用了更复杂的接种基质、猪皮和狗耳道 3D 打印模型。这项工作的结果证实了冷等离子体在不同表面抑制酵母菌的高效性，并将引发进一步的实验。
{"title":"Antimycotic effects of the plasma gun on the yeast Candida glabrata tested on various surfaces","authors":"Kristína Trebulová, Inna Orel, Jean‐Michel Pouvesle, Eric Robert, Amaury Rouillard, Augusto Stancampiano, Jan Hrudka, Přemysl Menčík, Zdenka Kozáková, Zuzana Měšťánková, Darina Kužmová, Ivana Paličková, Alois Čížek, František Krčma","doi":"10.1002/ppap.202400057","DOIUrl":"https://doi.org/10.1002/ppap.202400057","url":null,"abstract":"This work focuses on the antimycotic effects of the plasma gun as a potential tool for the treatment of superficial infections. <jats:italic>Candida glabrata</jats:italic> was chosen as a model microorganism. The preliminary tests have been done on the agar plates to establish the basic plasma parameters. To render this research more appropriate to the real application, more complex inoculation substrates, pork skin and 3D‐printed models of the dog ear canal have been used. The results of this work confirm the high efficiency of cold plasma in the inhibition of yeasts on different surfaces and will lead to further experiments.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"20 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Plasma jet printing, which does not require preprocessing and postprocessing, is a promising technology for manufacturing flexible electronics. The conductive properties should be confirmed to ensure the performance of the flexible electronics. In this study, the conductive properties and control mechanism of plasma jet‐printed silver patterns were investigated. Analyses show that high‐energy particles in the plasma decomposed organic solvents and induced the interconnection between silver nanoparticles. The plasma jet‐printed silver patterns had high uniformity in vertical spatial distribution. The dense packing of the silver patterns was achieved by increasing the number of printed layers, reducing the print speed, and increasing the focusing ratio. Oxidation of the silver nanoparticles was reduced and the conductivity was improved by increasing the focusing ratio.
{"title":"Plasma jet printing of silver patterns on flexible substrates: Conductive properties and control mechanism","authors":"Jiaqing Xue, Deping Yu, Yingxin Zhao, Xufeng Yue, Jianing Cai, Peng Zhang, Keming Peng","doi":"10.1002/ppap.202400110","DOIUrl":"https://doi.org/10.1002/ppap.202400110","url":null,"abstract":"Plasma jet printing, which does not require preprocessing and postprocessing, is a promising technology for manufacturing flexible electronics. The conductive properties should be confirmed to ensure the performance of the flexible electronics. In this study, the conductive properties and control mechanism of plasma jet‐printed silver patterns were investigated. Analyses show that high‐energy particles in the plasma decomposed organic solvents and induced the interconnection between silver nanoparticles. The plasma jet‐printed silver patterns had high uniformity in vertical spatial distribution. The dense packing of the silver patterns was achieved by increasing the number of printed layers, reducing the print speed, and increasing the focusing ratio. Oxidation of the silver nanoparticles was reduced and the conductivity was improved by increasing the focusing ratio.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"83 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study analyzes the selective productions of nitrogen oxides and ozone in dielectric barrier discharge due to temperature controlled by the dual duty cycle. In this work, we varied the dual duty cycle of the output voltage in the power supply, which alternatively generates distinguished high and low‐temperature modes for selective productions of nitrogen oxides and ozone. The alternating nitric oxide and ozone by dual duty cycle were measured at a maximum of 100 ppm and 100 ppm in the gas phase, respectively. In the evaluation of DI water treated by dual duty cycle, nitrogen oxides, and ozone have been observed simultaneously in the liquid phase. These results offer new insights into the selective production of temperature‐dependent chemical characteristics for advanced plasma applications.
{"title":"Selective productions of reactive species in dielectric barrier discharge by controlling dual duty cycle","authors":"Jun S. Lim, Kirubel A. Admasu, Eun H. Choi","doi":"10.1002/ppap.202400098","DOIUrl":"https://doi.org/10.1002/ppap.202400098","url":null,"abstract":"This study analyzes the selective productions of nitrogen oxides and ozone in dielectric barrier discharge due to temperature controlled by the dual duty cycle. In this work, we varied the dual duty cycle of the output voltage in the power supply, which alternatively generates distinguished high and low‐temperature modes for selective productions of nitrogen oxides and ozone. The alternating nitric oxide and ozone by dual duty cycle were measured at a maximum of 100 ppm and 100 ppm in the gas phase, respectively. In the evaluation of DI water treated by dual duty cycle, nitrogen oxides, and ozone have been observed simultaneously in the liquid phase. These results offer new insights into the selective production of temperature‐dependent chemical characteristics for advanced plasma applications.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"47 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141546978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this article, a compact and portable microwave atmospheric pressure plasma jet (MW‐APPJ) generator based on a coaxial transmission line resonator (CTLR) was proposed. Based on the electromagnetic simulations, the jet generator was designed as a tapered inner conductor structure that ensures plasma generation at low power. A self‐igniting argon (Ar) plasma jet of 10 mm length was generated at an input power of ~20 W and maintained at 2 W. Thanks to the high efficiency of the CTLR structure, plasmas of mixed reactive gases were also realized. Intrinsic plasma parameters and active species were determined using optical emission spectroscopy. Furthermore, the MW‐APPJ device was used to modify the polytetrafluoroethylene surface, and improvement of hydrophilicity was achieved without thermal damage.
{"title":"Study of a full coaxial atmospheric pressure plasma jet device and its application to the modification of polytetrafluoroethylene","authors":"Dai Zhang, Shuchang Xu, Zhenguo Hou, Xijiang Chang, Zhonghang Wu, Zilan Xiong","doi":"10.1002/ppap.202400078","DOIUrl":"https://doi.org/10.1002/ppap.202400078","url":null,"abstract":"In this article, a compact and portable microwave atmospheric pressure plasma jet (MW‐APPJ) generator based on a coaxial transmission line resonator (CTLR) was proposed. Based on the electromagnetic simulations, the jet generator was designed as a tapered inner conductor structure that ensures plasma generation at low power. A self‐igniting argon (Ar) plasma jet of 10 mm length was generated at an input power of ~20 W and maintained at 2 W. Thanks to the high efficiency of the CTLR structure, plasmas of mixed reactive gases were also realized. Intrinsic plasma parameters and active species were determined using optical emission spectroscopy. Furthermore, the MW‐APPJ device was used to modify the polytetrafluoroethylene surface, and improvement of hydrophilicity was achieved without thermal damage.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141546982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kerstin Sgonina, Christian Schulze, Alexander Quack, Jan Benedikt
The vacuum‐ultraviolet‐photoionization chamber was constructed to allow controlled ion generation and well‐defined surface treatment with these ions at atmospheric pressure. It utilizes atmospheric helium plasma as a photon source and separates the ion generation from the plasma by an aerodynamic window. The ions are guided to the grounded substrate by a weak electric field, while the diffusive transport of neutrals is reduced by a helium gas flow along the substrate. Ionic species and the absolute ion flux were determined in the substrate region. Ion‐based thin film deposition using a precursor was investigated as a model process. The proposed system enables future investigation of e.g. the isolated interaction of ions with biological substrates.
{"title":"Vacuum‐ultraviolet‐photoionization chamber for the investigation of ion‐based surface treatment and thin film deposition at atmospheric pressure","authors":"Kerstin Sgonina, Christian Schulze, Alexander Quack, Jan Benedikt","doi":"10.1002/ppap.202400103","DOIUrl":"https://doi.org/10.1002/ppap.202400103","url":null,"abstract":"The vacuum‐ultraviolet‐photoionization chamber was constructed to allow controlled ion generation and well‐defined surface treatment with these ions at atmospheric pressure. It utilizes atmospheric helium plasma as a photon source and separates the ion generation from the plasma by an aerodynamic window. The ions are guided to the grounded substrate by a weak electric field, while the diffusive transport of neutrals is reduced by a helium gas flow along the substrate. Ionic species and the absolute ion flux were determined in the substrate region. Ion‐based thin film deposition using a precursor was investigated as a model process. The proposed system enables future investigation of e.g. the isolated interaction of ions with biological substrates.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141569948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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