Ultimate one-dimensional heterojunctions of electron donor and acceptor materials have been realized within the inner hollow space of a single-walled carbon nanotube (SWNT). The heterojunction structures of Cs/I and inside SWNTs (Cs/I@SWNTs, ) yield the air-stable rectifying performance. Clear tunneling currents through the junction barrier could be also detected only for Cs/I@SWNTs, which is explained by the difference of depletion layer structures. Based on a potential calculation, symmetrical and asymmetrical depletion layers were found to be formed in Cs/I@SWNTs and , respectively. Low temperature measurements also supply evidence of asymmetric depletion layer formation in .
REFERENCES
1.
J. M.
Woodall
and H. J.
Hovel
, Appl. Phys. Lett.
21
, 379
(1972
).2.
S.
Iijima
and T.
Ichihashi
, Nature (London)
363
, 603
(1993
).3.
S. J.
Tans
, M. H.
Devoret
, H.
Dai
, A.
Thess
, R. E.
Smalley
, L. J.
Geerligs
, and C.
Dekker
, Nature (London)
386
, 474
(1997
).4.
C.
Zhou
, J.
Kong
, E.
Yenilmez
, and H.
Dai
, Science
290
, 1552
(2000
).5.
J. U.
Lee
, P. P.
Gipp
, and C. M.
Heller
, Appl. Phys. Lett.
85
, 145
(2004
).6.
H.
Li
, Q.
Zhang
, and N.
Marzari
, Nano Lett.
8
, 64
(2008
).7.
B. W.
Smith
, M.
Monthioux
, and D. E.
Luzzi
, Nature (London)
396
, 323
(1998
).8.
S.
Okada
, M.
Otani
, and A.
Oshiyama
, Phys. Rev. B
67
, 205411
(2003
).9.
T.
Takenobu
, T.
Takano
, M.
Shiraishi
, Y.
Murakami
, M.
Ata
, H.
Kataura
, Y.
Achiba
, and Y.
Iwasa
, Nature Mater.
2
, 683
(2003
).10.
Y. F.
Li
, R.
Hatakeyama
, J.
Shishido
, T.
Kato
, and T.
Kaneko
, Appl. Phys. Lett.
90
, 173127
(2007
).11.
Y. F.
Li
, R.
Hatakeyama
, and T.
Kaneko
, Appl. Phys. A: Mater. Sci. Process.
88
, 745
(2007
).12.
K.
Esfarjani
, A. A.
Farajian
, Y.
Hashi
, and Y.
Kawazoe
, Appl. Phys. Lett.
74
, 79
(1999
).13.
W.
Oohara
, M.
Nakahata
, and R.
Hatakeyama
, Appl. Phys. Lett.
88
, 191501
(2006
).14.
See EPAPS supplementary material at http://dx.doi.org/10.1063/1.3207742 for the experimental details of plasma ion irradiation, electrical analysis with FET configuration, doping density estimation, potential calculation around the depletion layer of Cs/I@SWNTs and , and gate bias efficiency estimation.
15.
16.
L.
Roschier
, J.
Penttila
, M.
Martin
, P.
Hakonen
, M.
Paalanen
, U.
Tapper
, E. I.
Kauppinen
, C.
Journet
, and P.
Bernier
, Appl. Phys. Lett.
75
, 728
(1999
).17.
J.
Nygard
, D.
Cobden
, M.
Bockrath
, P.
McEuen
, and P.
Lindelof
, Appl. Phys. A: Mater. Sci. Process.
69
, 297
(1999
).18.
R.
Saito
and H.
Shinohara
, Basic and Application of Carbon Nanotubes
(Baifukan
, Tokyo
, 2004
), Vol. 47
.© 2009 American Institute of Physics.
2009
American Institute of Physics
You do not currently have access to this content.
