Plasma production of metallic nanoparticles
Plasma production of metallic nanoparticles
复制标题
金属纳米颗粒的等离子体生产
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Phillips
中科院分区：
文献类型：
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作者：
C. Chou;J. Phillips
通过将二茂铁注入使用微波电源产生的低压、低功率等离子体的余辉区域来生产金属铁和氧化铁颗粒。这样做是为了探索使用流动型微波等离子体生产金属纳米粒子的可行性的一部分。研究发现，有两个参数对粒子影响最大：注入点和等离子体成分。使用穆斯堡尔效应光谱、透射电子显微镜和 X 射线衍射进行的分析表明，注入余辉区域导致小颗粒（约 10 nm）产量低。如果通过耦合器注入二茂铁，则形成的大颗粒（约 50 nm）的产率要高得多。在氢等离子体中，产生的颗粒是金属铁，而在氧和氩等离子体中，产生的颗粒是氧化铁。在所有情况下，金属颗粒周围都会形成大量石墨碳。
Metallic iron and iron oxide particles were produced by injecting ferrocene into the afterglow region of a low pressure, low power, plasma generated using a microwave power source. This was done as part of an effort to explore the feasibility of using flow type microwave plasmas for the production of metal nanoparticles. It was found that two parameters had the largest impact on the particles: injection point and plasma composition. Analysis done using Mössbauer effect spectroscopy, transmission electron microscopy, and x-ray diffraction indicated that low yields of small particles (ca. 10 nm) resulted from injection into the afterglow region. Much higher yields of large particles (ca. 50 nm) formed if the ferrocene was injected through the coupler. In hydrogen plasmas the particles that were produced were metallic iron, whereas in oxygen and argon plasmas the particles were iron oxide. In all cases significant amounts of graphitic carbon formed around the metal particles.