Ha Young Choi, Seong Chan Kang, Sang Jun Park, Hee Il Yoo, Sang‐Woo Jeon, Tae‐Hwan Kim, Se Youn Moon
Polyimide (PI) surfaces coated with and without boron nitride nanotubes (BNNTs) were treated using an atmospheric‐pressure cold plasma in open air. This treatment increased the surface wettability of the PI, measured by a decrease in water contact angle from 68° to 16°, resulting in a more uniform BNNT coating and improved surface adhesion. The plasma treatment of the BNNT‐coated PI surfaces also effectively removed residual polymer surfactants used for BNNT dispersion in water, without causing any thermal damage due to the low plasma and PI's surface temperatures of 350 and 300 K, respectively. The reactive oxygen species in the plasma, such as hydroxyl molecules and oxygen atoms, played an important role in these processes. Atmospheric‐pressure plasma can be employed in various applications in which thermally weak polymer‐based substrates are coated with BNNTs.
使用常压冷等离子体在露天处理涂有和未涂有氮化硼纳米管（BNT）的聚酰亚胺（PI）表面。这种处理方法提高了 PI 表面的润湿性（以水接触角从 68° 减小到 16° 来衡量），使 BNNT 涂层更加均匀，表面附着力得到改善。等离子处理 BNNT 涂层 PI 表面还能有效去除用于 BNNT 在水中分散的残留聚合物表面活性剂，由于等离子和 PI 表面温度分别为 350 和 300 K，因此不会造成任何热损伤。等离子体中的活性氧（如羟基分子和氧原子）在这些过程中发挥了重要作用。常压等离子体可用于在热弱聚合物基底上涂覆 BNNTs 的各种应用中。
{"title":"Multifunctional surface treatment of boron nitride nanotube‐coated polyimide films with atmospheric‐pressure cold plasma","authors":"Ha Young Choi, Seong Chan Kang, Sang Jun Park, Hee Il Yoo, Sang‐Woo Jeon, Tae‐Hwan Kim, Se Youn Moon","doi":"10.1002/ppap.202400031","DOIUrl":"https://doi.org/10.1002/ppap.202400031","url":null,"abstract":"Polyimide (PI) surfaces coated with and without boron nitride nanotubes (BNNTs) were treated using an atmospheric‐pressure cold plasma in open air. This treatment increased the surface wettability of the PI, measured by a decrease in water contact angle from 68° to 16°, resulting in a more uniform BNNT coating and improved surface adhesion. The plasma treatment of the BNNT‐coated PI surfaces also effectively removed residual polymer surfactants used for BNNT dispersion in water, without causing any thermal damage due to the low plasma and PI's surface temperatures of 350 and 300 K, respectively. The reactive oxygen species in the plasma, such as hydroxyl molecules and oxygen atoms, played an important role in these processes. Atmospheric‐pressure plasma can be employed in various applications in which thermally weak polymer‐based substrates are coated with BNNTs.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"41 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503507","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}
Shweta B. Borkar, Paritosh Patel, Manorma Negi, Tirtha Raj Acharya, Neha Kaushik, Eun Ha Choi, Nagendra K. Kaushik
The aggressiveness and limited treatment options make triple‐negative breast cancer (TNBC) a challenging condition to treat. Immune checkpoint blockade therapy, explicitly targeting the programmed death‐ligand 1 (PD‐L1) pathway, is a promising therapeutic approach. However, the effectiveness of PD‐L1 inhibitors like atezolizumab depends on adequate PD‐L1 expression within cancer cells. To this end, this study used nonthermal plasma (NTP) to modulate PD‐L1 in TNBC cells. The current investigation revealed that NTP treatment leads to an upregulation of PD‐L1; this might increase the availability of PD‐L1 to PD‐L1 inhibitors. These findings suggest that shortly NTP could be used as an adjunctive treatment to immunotherapy in TNBC cells.
{"title":"Modulation of programmed death‐ligand 1 expression to augment sensitivity to atezolizumab in breast cancer cells through nonthermal air gas plasma","authors":"Shweta B. Borkar, Paritosh Patel, Manorma Negi, Tirtha Raj Acharya, Neha Kaushik, Eun Ha Choi, Nagendra K. Kaushik","doi":"10.1002/ppap.202400072","DOIUrl":"https://doi.org/10.1002/ppap.202400072","url":null,"abstract":"The aggressiveness and limited treatment options make triple‐negative breast cancer (TNBC) a challenging condition to treat. Immune checkpoint blockade therapy, explicitly targeting the programmed death‐ligand 1 (PD‐L1) pathway, is a promising therapeutic approach. However, the effectiveness of PD‐L1 inhibitors like atezolizumab depends on adequate PD‐L1 expression within cancer cells. To this end, this study used nonthermal plasma (NTP) to modulate PD‐L1 in TNBC cells. The current investigation revealed that NTP treatment leads to an upregulation of PD‐L1; this might increase the availability of PD‐L1 to PD‐L1 inhibitors. These findings suggest that shortly NTP could be used as an adjunctive treatment to immunotherapy in TNBC cells.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"31 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503508","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}
Fuli Sun, Lin Xiong, Licheng Wang, Jie Li, Anton Nikiforov, Qing Xiong
This study presents atmospheric‐pressure plasma as a novel catalyst‐free pretreatment method for raw wheat straw (RWS) biomass. The work explores the effects of processing parameters, such as milled particle size, moisture content of RWS, and plasma generations, on pretreatment efficiency. To understand the mechanisms behind the enhanced pretreatment efficiency, various analysis techniques were used to analyze the physical and chemical properties of RWS before and after pretreatment. The analysis reveals that plasma pretreatment significantly damages the surface smoothness of RWS and enhances the decomposition of lignocellulosic structures. These effects are primarily attributed to the reactive species generated by the pulsed discharge, rather than the accompanying UV radiation, acidification, or heating actions during plasma pretreatment.
{"title":"Catalyst‐free pretreatment of raw wheat straw by atmospheric‐pressure pulsed air discharge for enhancement of sugar production","authors":"Fuli Sun, Lin Xiong, Licheng Wang, Jie Li, Anton Nikiforov, Qing Xiong","doi":"10.1002/ppap.202400064","DOIUrl":"https://doi.org/10.1002/ppap.202400064","url":null,"abstract":"This study presents atmospheric‐pressure plasma as a novel catalyst‐free pretreatment method for raw wheat straw (RWS) biomass. The work explores the effects of processing parameters, such as milled particle size, moisture content of RWS, and plasma generations, on pretreatment efficiency. To understand the mechanisms behind the enhanced pretreatment efficiency, various analysis techniques were used to analyze the physical and chemical properties of RWS before and after pretreatment. The analysis reveals that plasma pretreatment significantly damages the surface smoothness of RWS and enhances the decomposition of lignocellulosic structures. These effects are primarily attributed to the reactive species generated by the pulsed discharge, rather than the accompanying UV radiation, acidification, or heating actions during plasma pretreatment.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"22 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503506","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}
A novel plasma reactor is being investigated for green NOx production, crucial for nitrate‐based fertilizer manufacturing. Various parameters, including air flow rates, gas ratios, ozone, and catalyst effects are explored for NO → NO2 conversion. NOx concentrations reach ~0.6 vol%, with a total production of ~9.7 gr/h and energy cost of ~3.0 mJ/mol, notably favorable for atmospheric gliding arc plasma. Selectivity (~75%) towards NO2 is achieved with ozone addition or catalytic treatment, pivotal for nitrate fertilizer and HNO3 production.
{"title":"Sustainable nitrogen fixation by novel gliding arc plasma reactor for the production of nitrogen fertilizers","authors":"Jyothsna Angineni, PathpiReddy Manoj Kumar Reddy, Srinivas Anga, Puppala Veera Somaiah","doi":"10.1002/ppap.202400059","DOIUrl":"https://doi.org/10.1002/ppap.202400059","url":null,"abstract":"A novel plasma reactor is being investigated for green NOx production, crucial for nitrate‐based fertilizer manufacturing. Various parameters, including air flow rates, gas ratios, ozone, and catalyst effects are explored for NO → NO<jats:sub>2</jats:sub> conversion. NOx concentrations reach ~0.6 vol%, with a total production of ~9.7 gr/h and energy cost of ~3.0 mJ/mol, notably favorable for atmospheric gliding arc plasma. Selectivity (~75%) towards NO<jats:sub>2</jats:sub> is achieved with ozone addition or catalytic treatment, pivotal for nitrate fertilizer and HNO<jats:sub>3</jats:sub> production.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"25 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503509","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 paper comprehensively explores the integration of machine learning (ML) with atmospheric pressure plasma, highlighting its transformative impact in areas, such as modeling, diagnostics, and applications. The paper delves into the application of neural networks and deep learning models in simulating complex plasma dynamics, enhancing prediction accuracy, and reducing computational demands. We also examine the application of ML in plasma diagnostics, including real‐time data analysis and process optimization, demonstrating advancements in monitoring and controlling plasma systems. The article discusses the challenges encountered in this integration process, such as data quality, computational resources, and model interpretability. Finally, we outline future development directions, emphasizing the potential of ML in revolutionizing plasma research, improving operational efficiency, and opening new avenues in plasma technology.
本文全面探讨了机器学习（ML）与常压等离子体的结合，强调了其在建模、诊断和应用等领域的变革性影响。本文深入探讨了神经网络和深度学习模型在模拟复杂等离子体动力学、提高预测精度和降低计算需求方面的应用。我们还研究了 ML 在等离子体诊断中的应用，包括实时数据分析和流程优化，展示了在监测和控制等离子体系统方面的进步。文章讨论了集成过程中遇到的挑战，如数据质量、计算资源和模型可解释性。最后，我们概述了未来的发展方向，强调了人工智能在革新等离子体研究、提高运行效率和开辟等离子体技术新途径方面的潜力。
{"title":"Data‐driven plasma science: A new perspective on modeling, diagnostics, and applications through machine learning","authors":"Mengbing He, Ruihang Bai, Shihao Tan, Dawei Liu, Yuantao Zhang","doi":"10.1002/ppap.202400020","DOIUrl":"https://doi.org/10.1002/ppap.202400020","url":null,"abstract":"This paper comprehensively explores the integration of machine learning (ML) with atmospheric pressure plasma, highlighting its transformative impact in areas, such as modeling, diagnostics, and applications. The paper delves into the application of neural networks and deep learning models in simulating complex plasma dynamics, enhancing prediction accuracy, and reducing computational demands. We also examine the application of ML in plasma diagnostics, including real‐time data analysis and process optimization, demonstrating advancements in monitoring and controlling plasma systems. The article discusses the challenges encountered in this integration process, such as data quality, computational resources, and model interpretability. Finally, we outline future development directions, emphasizing the potential of ML in revolutionizing plasma research, improving operational efficiency, and opening new avenues in plasma technology.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"81 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503510","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 present study examined the impact of dielectric barrier discharge cold plasma treatment on the physicochemical characteristics of taro peel starch (TPS) and its films. This work reports for the first time on using native and modified TPS in the casting procedure to develop packaging films. The results showed that, as plasma exposure voltage and treatment time prolonged, the pH, 955 cm−1/1022 cm−1, % crystallinity, and turbidity of TPS significantly decreased, while amylose content, solubility, and 1047 cm−1/1022 cm−1 of TPS increased considerably. Despite this, modified TPS‐based films have comparatively smooth and homogeneous surfaces. Moreover, the modified starch‐based film exhibited the lowest water vapor permeability, elongation at break, and solubility, while highest opacity and tensile strength.
{"title":"Dielectric barrier discharge plasma: A green and novel method to change the structure of taro peel starch and improve the physicochemical properties of taro peel starch films","authors":"Rakesh Kumar Gupta, Proshanta Guha, Prem Prakash Srivastav","doi":"10.1002/ppap.202400047","DOIUrl":"https://doi.org/10.1002/ppap.202400047","url":null,"abstract":"The present study examined the impact of dielectric barrier discharge cold plasma treatment on the physicochemical characteristics of taro peel starch (TPS) and its films. This work reports for the first time on using native and modified TPS in the casting procedure to develop packaging films. The results showed that, as plasma exposure voltage and treatment time prolonged, the pH, 955 cm<jats:sup>−1</jats:sup>/1022 cm<jats:sup>−1</jats:sup>, % crystallinity, and turbidity of TPS significantly decreased, while amylose content, solubility, and 1047 cm<jats:sup>−1</jats:sup>/1022 cm<jats:sup>−1</jats:sup> of TPS increased considerably. Despite this, modified TPS‐based films have comparatively smooth and homogeneous surfaces. Moreover, the modified starch‐based film exhibited the lowest water vapor permeability, elongation at break, and solubility, while highest opacity and tensile strength.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"22 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503511","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}
Congfu Ran, Xiongfeng Zhou, Pan Dong, Kun Liu, Kostya (Ken) Ostrikov
To address the short lifetime of plasma‐activated water (PAW), this work reports on the application of ultralong‐lasting PAW for plant disease treatment. Compared with lettuce without ultralong‐lasting PAW treatment, the treated lettuce solution showed c. 1 log10 colony forming units mL−1 decrease in pathogens, as well as improvements in leaf area, leaf weight, root length, and root weight by 75%, 20%, 108.33%, and 150%, respectively. The leaf withering/root mortality rate of PAW‐treated plants was significantly lower than those of non‐PAW‐treated plants. Besides, disease defense‐related enzymes, such as catalase and β−1,3‐glucanase, were respectively enhanced by 112.5% and 5.13% in PAW‐treated lettuce, while the plant defense‐related genes were upregulated to respond to the pathogen's invasion.
{"title":"Ultralong‐lasting plasma‐activated water inhibits pathogens and improves plant disease resistance in soft rot‐infected hydroponic lettuce","authors":"Congfu Ran, Xiongfeng Zhou, Pan Dong, Kun Liu, Kostya (Ken) Ostrikov","doi":"10.1002/ppap.202400039","DOIUrl":"https://doi.org/10.1002/ppap.202400039","url":null,"abstract":"To address the short lifetime of plasma‐activated water (PAW), this work reports on the application of ultralong‐lasting PAW for plant disease treatment. Compared with lettuce without ultralong‐lasting PAW treatment, the treated lettuce solution showed <jats:italic>c</jats:italic>. 1 log<jats:sub>10</jats:sub> colony forming units mL<jats:sup>−1</jats:sup> decrease in pathogens, as well as improvements in leaf area, leaf weight, root length, and root weight by 75%, 20%, 108.33%, and 150%, respectively. The leaf withering/root mortality rate of PAW‐treated plants was significantly lower than those of non‐PAW‐treated plants. Besides, disease defense‐related enzymes, such as catalase and β−1,3‐glucanase, were respectively enhanced by 112.5% and 5.13% in PAW‐treated lettuce, while the plant defense‐related genes were upregulated to respond to the pathogen's invasion.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"18 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529012","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}
Christian Orellana, Claudio González‐Fuentes, María Abellan, Rodrigo Segura, Simón Oyazrún, Cristian Acevedo, Christian Romero
There is an increasing interest in magnetic nanoparticles (MNPs) and self‐assembled MNP chains for applications in biomedicine, catalysis, and other technologically relevant applications. In this work, we report the spontaneous self‐assembly of MNPs at the top surface of the shield of a magnetron sputter head. The resulting nanostructures consisted of clustered nanoscale chains arranged in highly oriented microfibers, with lengths of micrometer order and diameters ranging from 20 to 600 nm. The intense magnetic field gradient around the sputter magnetron's head is the driving force of the self‐assembly process, also trapping species that would otherwise be lost in the carrier gas flow.
{"title":"Spontaneous self‐assembly of magnetic nanoparticle chains, at the first stage of a gas aggregation source","authors":"Christian Orellana, Claudio González‐Fuentes, María Abellan, Rodrigo Segura, Simón Oyazrún, Cristian Acevedo, Christian Romero","doi":"10.1002/ppap.202400002","DOIUrl":"https://doi.org/10.1002/ppap.202400002","url":null,"abstract":"There is an increasing interest in magnetic nanoparticles (MNPs) and self‐assembled MNP chains for applications in biomedicine, catalysis, and other technologically relevant applications. In this work, we report the spontaneous self‐assembly of MNPs at the top surface of the shield of a magnetron sputter head. The resulting nanostructures consisted of clustered nanoscale chains arranged in highly oriented microfibers, with lengths of micrometer order and diameters ranging from 20 to 600 nm. The intense magnetic field gradient around the sputter magnetron's head is the driving force of the self‐assembly process, also trapping species that would otherwise be lost in the carrier gas flow.","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"2016 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938737","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}
Roxanne Z. Walker, Sophia Gershman, Dorothy E. Doughty, John E. Foster
{"title":"Outside Front Cover: Plasma Process. Polym. 5/2024","authors":"Roxanne Z. Walker, Sophia Gershman, Dorothy E. Doughty, John E. Foster","doi":"10.1002/ppap.202370035","DOIUrl":"https://doi.org/10.1002/ppap.202370035","url":null,"abstract":"","PeriodicalId":20135,"journal":{"name":"Plasma Processes and Polymers","volume":"69 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938740","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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