Direct imaging of the alkali metal site in K-doped fullerene peapods.
The structure of K-doped fullerene peapods has been investigated by means of high-resolution transmission electron microscopy and electron energy-loss spectroscopy (EELS). It is proven that the potassium atoms can be doped at the intermolecular sites within C60 peapods. The EELS spectrum of potassium (K) L edge clearly exhibits the feature of K+ in the doped peapod and consequently suggests n-type doping. These results encourage the realization of a one-dimensional superconducting wire based on the nanotube peapods.
Guan
Lunhui
L
Department of Chemistry, Peking University, Beijing 100871, People's Republic of China.
Suenaga
Kazu
K
Shi
Zujin
Z
Gu
Zhennan
Z
Iijima
Sumio
S