Electron paramagnetic resonance investigation of metalloendofullerene derived carbon nanotube peapods.
Electron paramagnetic resonance investigation of metalloendofullerene derived carbon nanotube peapods.
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DOI：
10.1063/1.2825592
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
Peter Jakes;A. Gembus;K. Dinse;K. Hata
中科院分区：
文献类型：
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作者：
Peter Jakes;A. Gembus;K. Dinse;K. Hata
以“超生长”法制备的单壁碳纳米管（SWCNT）和弧形生长材料为模板，用La@C(82)制备豆荚。 La@C(82) 掺入 SWNT 后，观察到其电子顺磁共振 (EPR) 性质发生了质的变化。与来自“空”管的信号相比，镧超精细相互作用的丧失以及在豌豆制备后观察到的 EPR 敏感性增加两个数量级，表明通过从 La@C(82) 到管的电荷和自旋转移产生了巡回自旋。这种解释得到了脉冲 EPR 技术检测到的快速自旋相移观察结果的支持。
Single Wall Carbon Nanotubes (SWCNT) prepared by the "super growth" method and arc-grown material were used as templates for peapod preparation with La@C(82). A qualitative change of the electron paramagnetic resonance (EPR) properties of La@C(82) is observed after incorporation into SWNT. The loss of lanthanum hyperfine interaction in combination with the observed increase of EPR susceptibility by two orders of magnitude after peapod preparation when comparing with signals from "empty" tubes is indicative for the generation of itinerant spins by charge and spin transfer from La@C(82) to the tubes. This interpretation is supported by the observation of fast spin dephasing, detected with pulsed EPR techniques.