Carbon nanotube-enhanced performance of microplasma devices
Carbon nanotube-enhanced performance of microplasma devices
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DOI：
10.1063/1.1755845
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发表时间：
2004-05
影响因子：
4
通讯作者：
S. Park;J. Eden;K. Park
中科院分区：
文献类型：
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作者：
S. Park;J. Eden;K. Park
将多壁碳纳米管(CNT)直接引入镍屏/BN/Ni微等离子体器件的圆柱形阴极，显著改善了器件的所有性能参数-工作电压和点火电压，以及辐射效率。这些器件的阴极直径为200μm，其工作电压比没有碳纳米管的相同结构所需的工作电压低30V(∼22%)。对于100-300Torr的Ne压力，碳纳米管的引入使点火电压降低了14%-18%。相比之下，在所研究的整个压力范围内(200-600托)，使用碳纳米管可以将300-800 nm光谱区域的辐射效率提高6%-9%。两种器件配置的伏安特性表明，由碳纳米管场发射在阴极微腔内产生的电子在影响器件性能方面是最有效的。
Incorporating multiwall carbon nanotubes (CNTs) directly into the cylindrical cathode of Ni screen/BN/Ni microplasma devices significantly improves all device performance parameters—operating and ignition voltages, as well as radiative efficiency. Having a cathode diameter of 200 μm, these devices exhibit operating voltages as much as 30 V (∼22%) lower than those required for an identical structure without CNTs. For Ne pressures of 100–300 Torr, ignition voltages are reduced by 14%–18% with the introduction of CNTs. In contrast, radiative efficiencies in the 300–800 nm spectral region are increased with CNTs by 6%–9% over the entire pressure range studied (200–600 Torr Ne). Voltage–current characteristics for two device configurations suggest that electrons generated within the cathode microcavity by CNT field emission are most effective in impacting device performance.