Tungsten Nanoparticles Generated in an Atmospheric Pressure Plasma Jet

IF 2.7 4区材料科学 Q3 CHEMISTRY, PHYSICAL Particle & Particle Systems Characterization Pub Date : 2024-05-30 DOI:10.1002/ppsc.202400037

Martin Müller, Maren Dworschak, Jan Benedikt, Lorenz Kienle

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Abstract

The atmospheric pressure plasma source HelixJet has been used to generate tungsten nanocrystals with narrow size distributions, well defined size control and with a considerably good particle yield. Tungsten particles are produced as the result of an evaporation process of a tungsten wire inserted on the middle axis of the jet after the wire is heated by interaction with the plasma. Temperature measurements using a thermocouple and by optical emission spectroscopy showed that, while the overall temperature of the wire is very high, it is not in the range of the melting temperature of tungsten; however, it can reach values needed for sublimation. Additionally, the wire is heated selectively while the temperature of the jet components reaches only a few hundred degrees Celsius. The particles cluster into agglomerates and their formation has been analyzed in relation to the reliability of a commercial scanning mobility particle sizer spectrometer. The dependence of the particle morphology and crystal structure on the plasma parameters such as power and gas flow was studied via transmission electron microscopy and the average size of the tungsten nanocrystals could be tuned between 12 and 25 nm.

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在大气压等离子体射流中生成的钨纳米粒子

常压等离子体源 HelixJet 已被用于生成钨纳米晶体，其粒度分布窄，粒度控制明确，颗粒产量相当高。钨丝与等离子体相互作用加热后，在喷射器中轴线上插入的钨丝蒸发过程中产生钨颗粒。使用热电偶和光学发射光谱进行的温度测量表明，虽然钨丝的整体温度很高，但并不在钨的熔化温度范围内；不过，它可以达到升华所需的温度值。此外，金属丝是有选择地加热的，而喷射成分的温度仅达到几百摄氏度。颗粒聚集成团，其形成与商用扫描迁移率颗粒测定仪光谱仪的可靠性有关。通过透射电子显微镜研究了颗粒形态和晶体结构对等离子参数（如功率和气体流量）的依赖性，钨纳米晶体的平均尺寸可在 12 至 25 纳米之间调整。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Particle & Particle Systems Characterization 工程技术-材料科学：表征与测试

CiteScore

5.50

自引率

0.00%

发文量

114

审稿时长

3.0 months

期刊介绍： Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.