We show that transition metal atoms, when in contact with the open ends of single-wall carbon nanotubes can form stable tip structures. This allows one to combine the superior elastic and mechanical behavior of the nanotubes with the excellent electronic and electrical properties of transition metal systems to make high quality atomistic scanning probes for various nanotechnological applications. The geometry of the tip as well as the nature of the electronic states at the tip are found to be determined by the type of the transition metal atoms. We propose optimal tip materials for efficient probes based on a detailed electronic structure analysis using ab initio methods.

1.
H.
Dai
,
J. H.
Hafner
,
A. G.
Rinzler
,
D. T.
Colbert
, and
R. E.
Smalley
,
Nature (London)
384
,
147
(
1996
).
2.
J. H.
Hafner
,
C. L.
Cheung
, and
C. M.
Lieber
,
Nature (London)
398
,
761
(
1999
).
3.
S. S.
Wong
,
E.
Joselevich
,
A. T.
Woolley
,
C. L.
Cheung
, and
C. M.
Lieber
,
Nature (London)
394
,
52
(
1998
).
4.
Q.
Ye
,
A. M.
Cassell
,
H.
Liu
,
K.-J.
Chao
,
J.
Han
, and
M.
Meyyappan
,
Nano Lett.
4
,
1301
(
2004
).
5.
A. N.
Andriotis
,
M.
Menon
, and
G.
Froudakis
,
Phys. Rev. Lett.
85
,
3193
(
2000
).
6.
A.
Thess
,
R.
Lee
,
P.
Nikolaev
,
H.
Dai
,
P.
Petit
,
J.
Robert
,
C.
Xu
,
Y. H.
Lee
,
S. G.
Kim
,
A. G.
Rinzler
,
D. T.
Colbert
,
G. E.
Scuseria
,
D.
Tománek
,
J. E.
Fischer
, and
R. E.
Smalley
,
Science
273
,
483
(
1996
).
7.
C. J.
Chen
,
Introduction to Scanning Tunneling Microscopy
(
Oxford University Press
, Oxford,
1993
).
8.
J.
Tersoff
and
D. R.
Hamann
,
Phys. Rev. Lett.
50
,
1998
(
1983
).
9.
S.
Ohnishi
and
M.
Tsukada
,
Solid State Commun.
71
,
391
(
1989
).
10.
J. E.
Demuth
,
U.
Koehler
, and
R. J.
Hamers
,
J. Microsc. (Paris)
151
,
289
(
1988
).
11.
B.
Li
,
H.
Wang
,
J.
Yang
, and
J. G.
Hou
,
Ultramicroscopy
98
,
317
(
2004
).
12.
M.
Tsukada
,
K.
Kobayashi
, and
N.
Isshiki
,
Surf. Sci.
242
,
12
(
1990
).
13.
W. A.
Hofer
,
J.
Redinger
, and
P.
Varga
.
Solid State Commun.
113
,
245
(
2000
).
14.
M.
Tsukada
and
N.
Shima
,
J. Phys. Soc. Jpn.
56
,
2875
(
1987
).
15.
J.
Taylor
,
H.
Guo
, and
J.
Wang
,
Phys. Rev. B
63
,
245407
(
2001
).
17.
A. N.
Andriotis
and
M.
Menon
,
J. Chem. Phys.
115
,
2737
(
2001
).
18.
J. J.
Palacios
,
A. J.
Perez-Jimenez
,
E.
Louis
,
E.
SanFabian
, and
J. A.
Verges
,
Phys. Rev. Lett.
90
,
106801
(
2003
).
19.
A. N.
Andriotis
,
M.
Menon
, and
G. E.
Froudakis
,
Appl. Phys. Lett.
76
,
3890
(
2000
).
20.
Y.
Xue
and
M. A.
Ratner
,
Phys. Rev. B
69
,
161402
(R) (
2004
).
21.
B.
Delley
,
J. Chem. Phys.
113
,
7756
(
2000
).
22.
M. B.
Knickelbeim
,
S.
Yang
, and
S. J.
Riley
,
J. Chem. Phys.
93
,
94
(
1990
).
23.
D. P.
Burt
,
N. R.
Wilson
,
J. M.R.
Weaver
,
P. S.
Dopson
, and
J. V.
Macpherson
,
Nano Lett.
5
,
639
(
2005
).
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