标题： 辐照诱导单壁碳纳米管空位的形成 显示英文标题

标题： Irradiation induced vacancy creation in single walled carbon nanotubes

摘要： 直径为2纳米、长度为3至13微米的单壁碳纳米管被压缩在铜弹丸中，并用能量从0.2到2.0 keV的铯正离子照射，并受到逐渐增加的铯剂量处理。 从溅射碳原子和团簇的质量谱随铯能量的变化情况，可以监测碎片物种相对数密度的趋势，表明损伤的积累。 辐射引起的碎片化提供了由于单原子、双原子、三原子和更高物种的溅射而产生空位导致结构变化的线索。 对辐射靶的电导率的监测提供了关于单壁碳纳米管结构随铯能量和剂量变化可能发生的转变序列的信息。 显示英文摘要

摘要： Single walled carbon nanotubes of 2 nm diameter and 3 to 13 micro meter length were compressed in Cu bullets and irradiated with positive ions of Cs with energies from 0.2 to 2.0 keV and subjected to successively increasing Cs dose. From the mass spectra of the sputtered carbon atoms and clusters as a function of Cs energy the monitoring of trend of the relative number densities of the fragmenting species indicates the accumulating damage. Irradiation induced fragmentation provide clues to the structural changes as a result of creation of vacancies due to the sputtering of monatomic, diatomic, triatomic and higher species. Monitoring of the the irradiated target electrical conductivity provides information of the sequences of the transformation that may be occurring in the structures of the single walled carbon nanotube as a function of Cs energy and dose.