Interactions between micro-plasma devices

微等离子体装置之间的相互作用

基本信息

  • 批准号:
    EP/H003797/1
  • 负责人:
  • 金额:
    $ 100.24万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Fellowship
  • 财政年份:
    2010
  • 资助国家:
    英国
  • 起止时间:
    2010 至 无数据
  • 项目状态:
    已结题

项目摘要

Plasma - the 4th state of matter - is an ionized gas exhibiting collective phenomena. The outstanding role of plasmas in our daily lives remains largely hidden; many products could not exist without plasmas. They underlie technologies, such as TV-displays, mobile phones, solar-cells, nano-chip fabrication, aerospace applications, high-efficiency lighting, biomedicine, cancer treatment, etc. Plasmas are, therefore, often referred to as nano-scale engineering tools of the future.Both fascinating fundamental scientific issues and the enormous social impact that result from their applications drive the field of plasma science and technology. The unique property of low temperature plasmas lies in the fact that the plasma species are not in thermodynamic equilibrium. These plasmas consist of electrons, ions and neutrals. Electron temperatures are around 10000 - 50000 K, while the heavier ions and neutrals are around room temperature. The 'hot' electrons can provide a unique active chemical environment in a cold gas. This offers the facility for precise treatment and modifications of surfaces - even temperature sensitive surfaces such as semiconductors or bio-materials.Particularly challenging and at the same time highly promising is the emerging field of so-called micro-plasmas operated at ambient atmospheric pressure. Micro-plasmas are confined to dimensions on a micro-metre scale and are at present probably the 'hottest' topic in low-temperature plasma science. One can envisage the development of inexpensive disposable micro-plasma sources. High concentrations of radicals can be provided at low gas temperatures without complicated vacuum equipment, e.g. for sterilization and cancer treatments under atmospheric pressure conditions. These areas are frontier technologies with enormous future industrial benefit and social significance.The proposed project, on fundamental investigations of interaction mechanisms between multiple micro-plasmas, provides extraordinary opportunity to lift this research area to its next level. A key issue in understanding fundamental processes, towards their intelligent use for tailoring plasma properties, is insight into power coupling and plasma sustainment mechanisms. There has been some recent progress in understanding single micro-plasma devices, but the interaction of multiple micro-plasma devices is far more complex. In multiple devices, e.g. micro-plasma arrays, single devices interact with each other and their coupling can result in pattern and structure formation. Detailed studies of relevant interaction mechanisms are absent but crucial for further developments and exploitations of micro-plasma arrays. The key to understanding the interaction is to investigate details of energy transport mechanisms. Important factors are the individual roles of energy carrying particles (electrons, ions, radicals, metastables), radiation transport and photo-ionization, and material dependent surface reactions.Measurements on micro-plasmas are extremely challenging due to their very small structures (micron scale) and the collision dominated high-pressure environment requiring exceptionally high temporal resolution down to pico-seconds. Essential diagnostics are newly available modern optical diagnostic techniques and laser spectroscopy - both with pico-second resolution. The most promising approach is exploiting the synergy of these ultrafast diagnostic techniques and state-of-the-art numerical computer simulations.
等离子体——物质的第四种状态——是一种电离气体,表现出集体现象。等离子体在我们日常生活中的突出作用在很大程度上仍然被隐藏;如果没有等离子体,许多产品就无法存在。它们是电视显示器、移动电话、太阳能电池、纳米芯片制造、航空航天应用、高效照明、生物医学、癌症治疗等技术的基础。因此,等离子体通常被认为是未来的纳米级工程工具。引人入胜的基础科学问题及其应用产生的巨大社会影响推动了等离子体科学和技术领域的发展。低温等离子体的独特性质在于等离子体不处于热力学平衡状态。这些等离子体由电子、离子和中性组成。电子温度在10000 - 50000 K左右,而较重的离子和中性离子的温度在室温左右。“热”电子可以在冷气体中提供独特的活性化学环境。这为精确处理和修改表面提供了设备-甚至是温度敏感的表面,如半导体或生物材料。在大气压下操作的所谓微等离子体这一新兴领域尤其具有挑战性,同时也极具前景。微等离子体被限制在微米尺度上,目前可能是低温等离子体科学中“最热门”的话题。人们可以设想开发廉价的一次性微等离子体源。高浓度的自由基可以在低温下提供,而不需要复杂的真空设备,例如用于常压条件下的灭菌和癌症治疗。这些领域都是具有巨大未来工业效益和社会意义的前沿技术。拟议的项目,对多个微等离子体之间相互作用机制的基础研究,提供了非凡的机会,将这一研究领域提升到一个新的水平。理解基本过程的一个关键问题,是对功率耦合和等离子体维持机制的洞察,从而实现对等离子体特性的智能使用。在理解单个微等离子体器件方面取得了一些进展,但多个微等离子体器件的相互作用要复杂得多。在多个器件中,例如微等离子体阵列,单个器件相互作用,它们的耦合可以导致图案和结构的形成。有关相互作用机制的详细研究缺乏,但对微等离子体阵列的进一步发展和利用至关重要。理解相互作用的关键是研究能量传递机制的细节。重要的因素是携带能量的粒子(电子、离子、自由基、亚稳态)、辐射输运和光电离以及依赖于材料的表面反应的个体作用。由于微等离子体的结构非常小(微米尺度),并且碰撞主导的高压环境需要非常高的时间分辨率,低至皮秒,因此测量微等离子体极具挑战性。基本诊断是最新可用的现代光学诊断技术和激光光谱学-两者都具有皮秒分辨率。最有希望的方法是利用这些超快速诊断技术和最先进的数值计算机模拟的协同作用。

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Electron dynamics and plasma jet formation in a helium atmospheric pressure dielectric barrier discharge jet
  • DOI:
    10.1063/1.3628455
  • 发表时间:
    2011-09-19
  • 期刊:
  • 影响因子:
    4
  • 作者:
    Algwari, Q. Th.;O'Connell, D.
  • 通讯作者:
    O'Connell, D.
Eradication of Pseudomonas aeruginosa biofilms by atmospheric pressure non-thermal plasma.
  • DOI:
    10.1371/journal.pone.0044289
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    Alkawareek MY;Algwari QT;Laverty G;Gorman SP;Graham WG;O'Connell D;Gilmore BF
  • 通讯作者:
    Gilmore BF
Capacitively coupled hydrogen plasmas sustained by tailored voltage waveforms: excitation dynamics and ion flux asymmetry
  • DOI:
    10.1088/0963-0252/25/4/045019
  • 发表时间:
    2016-07
  • 期刊:
  • 影响因子:
    3.8
  • 作者:
    B. Bruneau;P. Diomede;D. J. Economou;S. Longo;T. Gans;D. O’Connell;A. Greb;E. Johnson;J. Booth
  • 通讯作者:
    B. Bruneau;P. Diomede;D. J. Economou;S. Longo;T. Gans;D. O’Connell;A. Greb;E. Johnson;J. Booth
Controlled production of atomic oxygen and nitrogen in a pulsed radio-frequency atmospheric-pressure plasma
  • DOI:
    10.1088/1361-6463/aa8da2
  • 发表时间:
    2017-11-15
  • 期刊:
  • 影响因子:
    3.4
  • 作者:
    Dedrick, J.;Schroter, S.;Gans, T.
  • 通讯作者:
    Gans, T.
Slope and amplitude asymmetry effects on low frequency capacitively coupled carbon tetrafluoride plasmas
  • DOI:
    10.1063/1.4947453
  • 发表时间:
    2016-04
  • 期刊:
  • 影响因子:
    3.2
  • 作者:
    B. Bruneau;I. Korolov;T. Lafleur;T. Gans;D. O’Connell;A. Greb;A. Derzsi;Z. Donkó;S. Brandt;E. Schüngel;J. Schulze;E. Johnson;J. Booth
  • 通讯作者:
    B. Bruneau;I. Korolov;T. Lafleur;T. Gans;D. O’Connell;A. Greb;A. Derzsi;Z. Donkó;S. Brandt;E. Schüngel;J. Schulze;E. Johnson;J. Booth
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Deborah O'Connell其他文献

Biofuel excision and the viability of ethanol production in the Green Triangle, Australia
  • DOI:
    10.1016/j.enpol.2011.01.018
  • 发表时间:
    2011-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Luis C. Rodriguez;Barrie May;Alexander Herr;Damien Farine;Deborah O'Connell
  • 通讯作者:
    Deborah O'Connell

Deborah O'Connell的其他文献

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{{ truncateString('Deborah O'Connell', 18)}}的其他基金

Interactions between micro-plasma devices
微等离子体装置之间的相互作用
  • 批准号:
    EP/H003797/2
  • 财政年份:
    2011
  • 资助金额:
    $ 100.24万
  • 项目类别:
    Fellowship

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