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Liquid Droplets In Contact With Cold Non-Equilibrium Atmospheric Pressure Plasmas

机译:与非平衡大气压等离子体接触的液滴

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Recently, cold, non-equilibrium atmospheric pressure plasmas (CAPs) and their active chemistry have been extensively investigated to the benefit of a wide array of applications such as biomedical and industrial applications mainly in the area of materials processing and chemical synthesis, amongst many others. In general, these plasmas operate at standard conditions (i.e. 1 atm, 300K), are small (~ cm) and rather simple to operate in comparison to other plasmas. Their complex chemistry gives rise to a wide array of both stable and transient reactive species: such as O_3, H_2O_2, OH and NOx, next to charged species and (V)UV-radiation. This chemistry is the reason for their wide spread application and has already found many industrial applications from waste water treatment, stain free detergents and industrial scale production of oxidants. In recent years, bactericidal effects of CAPs gained increasing attention for applications such as dermatology, disinfection, dentistry and cancer treatment or stimulated blood coagulation. This paper aims to highlight recent research into new biological applications for complex mission scenarios involving humans in remote locations using CAPs for disinfection, bleaching or wound healing. Results using radiofrequency plasma jets for the inactivation of Pseudomonas aeruginosa are summarized, highlighting the importance of liquid plasma interactions. Work with such a CAP paved the way for a promising application in the field of biomedical applications presented here. It involves surface barrier discharges which can be used to treat larger surfaces compared to jets. Their physical construction, using floating or contained electrodes, offer a convenient way of controlling electrical current on a large scale, 3D treatment of both conducting and insulating surfaces with minimal heating. These devices may be tailored to specific skin treatments, allowing fast and effective treatment of larger skin surfaces while following the shape of the skin. This might reduce the need for bactericidal agents and would be a valuable application to assist humans in remote locations. These emerging technologies could be essential both for human health care under extreme conditions, as well as for research itself (sterilisation of tools and large areas, etc.). Especially in the absence of abundant resources (antibiotic agents, disinfectants and the like) alternative approaches to support humans in isolated locations have to be developed. Applications based on a good understanding of plasma chemistry would empower health care under extreme conditions to efficiently use and manage in situ resources. Their low mass, compact size, low power consumption and high reliability could make them essential use under extreme conditions.
机译:最近,对冷,非平衡大气压等离子体(CAP)及其活性化学进行了广泛研究,以使诸如生物医学和工业应用等广泛应用受益,其中主要是在材料加工和化学合成领域,以及许多其他领域。通常,这些等离子在标准条件下(即1 atm,300K)运行,与其他等离子相比,体积小(〜cm),并且操作简单。它们的复杂化学反应产生了各种各样的稳定和短暂的反应性物质:例如O_3,H_2O_2,OH和NOx,仅次于带电物质和(V)UV辐射。这种化学方法是其广泛应用的原因,并且已经在废水处理,无污洗涤剂和工业规模的氧化剂生产中发现了许多工业应用。近年来,CAP的杀菌作用在诸如皮肤病学,消毒,牙科和癌症治疗或刺激性凝血的应用中越来越受到关注。本文旨在重点介绍针对复杂任务场景的新生物应用的最新研究,这些场景涉及使用CAP进行消毒,漂白或伤口愈合的偏远地区的人类。总结了使用射频等离子体射流灭活铜绿假单胞菌的结果,突出了液体血浆相互作用的重要性。使用这种CAP可以为此处介绍的生物医学应用领域中的有希望的应用铺平道路。它涉及表面屏障放电,与喷射流相比,可用于处理更大的表面。它们的物理结构(使用浮动电极或封闭电极)提供了一种方便的方式来控制电流,以最小的热量对导体和绝缘表面进行大规模3D处理。这些设备可以针对特定的皮肤护理量身定制,从而可以在顺应皮肤形状的同时快速有效地治疗较大的皮肤表面。这可以减少对杀菌剂的需求,并且将是在偏远地区帮助人类的有价值的应用。这些新兴技术对于极端条件下的人类医疗保健以及研究本身(工具和大面积消毒等)都至关重要。特别是在缺乏丰富的资源(抗生素,消毒剂等)的情况下,必须开发出在偏远地区支持人类的替代方法。基于对等离子体化学的良好理解而进行的应用将使极端条件下的医疗保健能够有效地利用和管理原地资源。它们的质量轻,体积小,功耗低,可靠性高,使其在极端条件下必不可少。

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