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能量与空间分辨的单分子显微术——透过碳笼“看”富勒烯包合物内的金属原子
Detection of the metal atom inside a fullerene cage by scanning tunneling microscopy
【摘要】 文章作者用探测扫描隧道电流微分谱的方法 ,对金属富勒烯包合物分子进行了研究 ,得到了Dy@C82 同分异构体Ⅰ的金属 -碳笼杂化态在实空间的能量分布图 ,通过将实验与理论模拟的结果进行比较 ,推断出Dy原子在碳笼中的位置以及金属富勒烯包合物分子在衬底表面的吸附取向 .这项技术为单分子纳米器件的表征和诊断提供了新的途径
【Abstract】 Using scanning tunneling microscopy, scanning tunneling spectroscopy and theoretical simulations we have studied the local structural and electronic properties of individual metallofullerene molecules, and spatially mapped the energy-resolved metal-cage hybrid states of a single endohedral metallofullerene Dy@C 82 isomer I. The relative position of the Dy atom in the cage and the orientation of the molecule are inferred by comparing the experimental results with theoretical simulations. This combined technique provides promising applications in characterizing and diagnosing nanodevices based on a single molecule.
【Key words】 scanning tunneling microscopy; scanning tunneling spectroscopy; fullerene; electronics of single molecule;
- 【文献出处】 物理 ,Physics , 编辑部邮箱 ,2004年05期
- 【分类号】O562
- 【下载频次】144