Regular microcoiled carbon fibers with a double helix structure have been synthesized by the catalytic pyrolysis of acetylene at 750790°C using Ni powder as a catalyst and thiophene as a promotor. The measurements by a standard four-probe technique of resistance, I-V curves, and magnetoresistance of a single microcoiled fiber are presented. I-V curves and the temperature dependence of the resistance are in accordance with Mott-David [Electronic Processes in Noncrystalline Materials (Oxford University Press, Oxford, 1979), 2nd ed., p. 32] variable range hopping above 13K and Shklovskii-Efros [Electronic Properites of Doped Semiconductors (Springer, Berlin, 1984), p. 202];Pollak-Shklovshii [Hopping Transport in Solids, (North-Holland, Amsterdam, 1991), 273] variable range hopping below 13K. In addition, a positive magnetoresistance with H2-dependence behavior is observed at low temperature.

1.
S.
Motojima
,
S.
Hoshiya
, and
Y.
Hishikawa
,
Carbon
41
,
2658
(
2003
).
2.
Yong
Qin
,
Zhikun
Zhang
, and
Zuolin
Cui
,
Carbon
42
,
1917
(
2004
).
3.
W. R.
Davis
,
R. J.
Slawson
, and
G. R.
Rigby
,
Nature (London)
171
,
756
(
1953
).
4.
Seiji
Motojima
,
Masayuki
Kawaguchi
,
Koji
Nozaki
, and
Hiroshi
Iwanaga
,
Appl. Phys. Lett.
56
,
321
(
1990
).
5.
C.
Kuzuya
,
Y.
Hayashi
, and
Seiji
Motojima
,
Carbon
40
,
1071
(
2002
).
6.
Jining
Xie
,
Pramod K.
Sharma
,
V. V.
Varadan
,
V. K.
Varadan
,
Bhabendra K.
Pradhan
, and
Semih
Eser
,
Mater. Chem. Phys.
76
,
217
(
2002
).
7.
Yong
Qin
,
Zhikun
Zhang
, and
Zuolin
Cui
,
Carbon
41
,
3072
(
2002
).
8.
S.
Motojima
,
Y.
Itoh
, and
S.
Asakura
,
J. Mater. Sci.
30
,
5049
(
1995
).
9.
Wenjun
Li
,
Yanchuan
Guo
, and
Lijuan
Chen
,
Chemical Journal of Chinese Universities-Chinese
, 26,
H41260
(
2005
).
10.
Handbook of Conducting Polymers
, edited by
T.
Skotheim
,
R.
Elsenbaumer
, and
J.
Reynolds
(
Dekker
,
New York
,
1998
), p.
27
.
11.
N. F.
Mott
and
E. A.
David
,
Electronic Processes in Noncrystalline Materials
, 2nd ed. (
Oxford University Press
,
Oxford
,
1979
), p.
32
.
12.
B. I.
Shklovskii
and
A. L.
Efros
,
Electronic Properties of Doped Semiconductors
(
Springer
,
Berlin
,
1984
), p.
202
;
M.
Pollak
and
B. I.
Shklovskii
,
Hopping Transport in Solids
(
North-Holland
,
Amsterdam
,
1991
), p.
273
.
13.
Yunze
Long
,
Lijuan
Zhang
,
Zhaojia
Chen
,
Kun
Huang
,
Yongsheng
Yang
,
Hongwei
Xiao
,
Meixiang
Wan
,
Aizi
Jin
, and
Changzhi
Gu
,
Phys. Rev. B
71
,
165412
(
2005
).
14.
J. M.
Mativetsky
and
W. R.
Datars
,
Physica B
324
,
191
(
2002
).
15.
J. M.
Benoit
,
B.
Corraze
, and
O.
Chauyet
,
Phys. Rev. B
65
,
241405
(
2002
).
16.
Y.
Yosida
and
I.
Oguro
,
J. Appl. Phys.
83
,
4985
(
1998
).
17.
Y.
Yosida
and
I.
Oguro
,
J. Appl. Phys.
86
,
999
(
1999
).
18.
C. O.
Yoon
,
M.
Reghu
,
D.
Moses
,
A. J.
Heeger
,
Y.
Cao
,
T. A.
Chen
,
X.
Wu
, and
R. D.
Rieke
,
Synth. Met.
75
,
229
(
1995
).
19.
M.
Ghosh
,
A.
Barman
,
S. K.
De
, and
S.
Chatterjee
,
J. Appl. Phys.
84
,
806
(
1998
).
20.
B. L.
Altshuler
and
A. G.
Aronov
, in
Electron-Electron Interaction in Disordered Systems
, in
Modern Problems in Condensed Matter Sciences
, edited by
A. L.
Efros
and
M.
Pollak
(
North-Holland
,
Amsterdam
,
1985
), p.
1
.
21.
B. L.
Altshuler
,
A. G.
Aronov
, and
P. A.
Lee
,
Phys. Rev. Lett.
44
,
1288
(
1980
).
22.
N.
Kang
,
J. S.
Hu
,
W. J.
Kong
,
L.
Lu
,
D. L.
Zhang
,
Z. W.
Pan
, and
S. S.
Xie
,
Phys. Rev. B
66
,
241403
(
2002
).
You do not currently have access to this content.