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Science 22 December 2000:
Vol. 290. no. 5500, pp. 2280 - 2282
DOI: 10.1126/science.290.5500.2280
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Reports
Element-Selective Single Atom Imaging
K. Suenaga,13*
M. Tencé,1
C. Mory,1
C. Colliex,12
H. Kato,4
T. Okazaki,4
H. Shinohara,4
K. Hirahara,3
S. Bandow,3
S. Iijima35
Electron energy-loss spectroscopy (EELS) is widely used
to identify elemental compositions of materials studied by microscopy. We demonstrate that the sensitivity and spatial resolution of EELS can
be extended to the single-atom limit. A chemical map for gadolinium
(Gd) clearly reveals the distribution of Gd atoms inside a single chain
of metallofullerene molecules (Gd@C82) generated within a single-wall carbon nanotube. This characterization technique thus provides the "eyes" to see and identify individual atoms in
nanostructures. It is likely to find broad application in nanoscale science and technology research.
1 Laboratoire de Physique des Solides (CNRS UMR
8502),
2 Laboratoire Aimé Cotton (CNRS UPR
3321), Université Paris-Sud, Orsay 91405, France.
3 Japan Science and Technology Corporation,
"Nanotubulites" project, Meijo University, Nagoya 468-8502, Japan.
4 Department of Chemistry, Nagoya University, Nagoya
464-8602, Japan.
5 NEC Corporation, Tsukuba
305-8501, Japan.
*
To whom correspondence should be addressed. E-mail:
suenaga{at}meijo-u.ac.jp
Read the Full Text
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