Carbon nanosheets, a two-dimensional carbon nanostructure, are promising electron cathode materials for applications in vacuum microelectronic devices. This letter demonstrates a simple approach to improve the spatial emission uniformity of carbon nanosheets by coating them with a chromium oxide thin film. Photoelectron emission microscopy observations and in situ field emission tests revealed that chromium oxide coated carbon nanosheets not only have spatial uniformity but also have coating thickness dependent field emission properties. For example, a coating thickness of 1.5nm gave a substantially greater field emission than as-grown nanosheets or other thickness coatings.

1.
M.
Zhu
,
J.
Wang
,
R. A.
Outlaw
,
K.
Hou
,
D. M.
Manos
, and
B. C.
Holloway
,
Diamond Relat. Mater.
16
,
196
(
2007
).
2.
B. L.
French
,
J. J.
Wang
,
M. Y.
Zhu
, and
B. C.
Holloway
,
Thin Solid Films
494
,
105
(
2006
).
3.
B. L.
French
,
J. J.
Wang
,
M. Y.
Zhu
, and
B. C.
Holloway
,
J. Appl. Phys.
97
,
114317
(
2005
).
4.
J. J.
Wang
,
M. Y.
Zhu
,
R. A.
Outlaw
,
X.
Zhao
,
D. M.
Manos
,
B. C.
Holloway
, and
V. P.
Mammana
,
Appl. Phys. Lett.
85
,
1265
(
2004
).
5.
J.
Wang
,
M.
Zhu
,
X.
Zhao
,
R. A.
Outlaw
,
D. M.
Manos
,
B. C.
Holloway
,
C.
Park
,
T.
Anderson
, and
V. P.
Mammana
,
J. Vac. Sci. Technol. B
22
,
1269
(
2004
).
6.
J.
Wang
,
M.
Zhu
,
R. A.
Outlaw
,
X.
Zhao
,
D. M.
Manos
, and
B. C.
Holloway
,
Carbon
42
,
2867
(
2004
).
7.
S.
Wang
,
J.
Wang
,
P.
Miraldo
,
M.
Zhu
,
R.
Outlaw
,
K.
Hou
,
X.
Zhao
,
B. C.
Holloway
,
D.
Manos
,
T.
Tyler
,
O.
Shenderova
,
M.
Ray
,
J.
Dalton
, and
G.
McGuire
,
Appl. Phys. Lett.
89
,
183103
(
2006
).
8.
T.
Tyler
,
O.
Shenderova
,
M.
Ray
,
J.
Dalton
,
J.
Wang
,
R.
Outlaw
,
M.
Zhu
,
X.
Zhao
,
G.
McGuire
, and
B. C.
Holloway
,
J. Vac. Sci. Technol. B
24
,
2295
(
2006
).
9.
K.
Hou
, Ph.D. thesis,
College of William and Mary
,
2007
.
10.
L. E.
Davis
,
N. C.
MacDonald
,
P. W.
Palmberg
,
G. E.
Riach
, and
R. E.
Weber
,
Handbook of Auger Electron Spectroscopy
(
Physical Electronics Industries
,
Eden Prairie
,
1976
).
11.
D.
Habliston
,
G. B.
Birrel
, and
O. H.
Griffith
,
J. Phys. Chem.
97
,
3022
(
1993
).
12.
H. H.
Busta
,
R. J.
Espinosa
,
A. T.
Rakhimov
,
N. V.
Suetin
,
M. A.
Timofeyev
,
P.
Bressler
,
M.
Schramme
,
J. R.
Fields
,
M. E.
Kordesch
, and
A.
Silzars
,
Solid-State Electron.
45
,
1039
(
2001
).
13.
A. R.
Krauss
,
O.
Auciello
,
M. Q.
Ding
,
D. M.
Gruen
,
Y.
Huang
,
V. V.
Zhirnov
,
E. I.
Givargizov
,
A.
Breskin
,
R.
Chechen
,
E.
Shefer
,
V.
Konov
,
S.
Pimenov
,
A.
Karabutov
,
A.
Rakhimov
, and
N.
Suetin
,
J. Appl. Phys.
89
,
2958
(
2001
).
15.
J. S.
Moon
,
P. S.
Alegaonkar
,
J. H.
Han
,
T. Y.
Lee
,
J. B.
Yoo
, and
J. M.
Kim
,
J. Appl. Phys.
100
,
104303
(
2006
).
16.
W. K.
Yi
,
T. W.
Jeong
,
S. G.
Yu
,
J. N.
Heo
,
C. S.
Lee
,
J. H.
Lee
,
W. S.
Kim
,
J. B.
Yoo
, and
J. M.
Kim
,
Adv. Mater. (Weinheim, Ger.)
14
,
1464
(
2002
).
17.
V. V.
Zhirnov
,
W. B.
Choi
,
J. J.
Cuomo
, and
J. J.
Hren
,
Appl. Surf. Sci.
94-95
,
123
(
1996
).
18.
Certain commercial equipment, instruments, or materials are identified in this paper to foster understanding. Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the materials or equipment are necessarily the best available for the purpose.
You do not currently have access to this content.