Tunable and highly reproducible metal–insulator transitions have been observed in bilayer graphene upon thermal annealing at 400 K under high vacuum conditions. Before annealing, the sample is metallic in the whole temperature regime of study. Upon annealing, the conductivity changes from metallic to that of an insulator and the transition temperature is a function of annealing time. The pristine metallic state can be reinstated by exposing to air thereby inducing changes in the electronic properties by adsorbing water vapor, which makes graphene a technologically promising material for sensor applications.
REFERENCES
1.
K. S.
Novoselov
, Z.
Jiang
, Y.
Zhang
, S. V.
Morozov
, H. L.
Stormer
, U.
Zeitler
, J. C.
Maan
, G. S.
Boebinger
, P.
Kim
, and A. K.
Geim
, Science
315
, 1379
(2007
).2.
K. S.
Novoselov
, A. K.
Geim
, S. V.
Morozov
, D.
Jiang
, M. I.
Katsnelson
, I. V.
Grigorieva
, S. V.
Dubonos
, and A. A.
Firsov
, Nature (London)
438
, 197
(2005
).3.
M. Y.
Han
, B.
Ozyilmaz
, Y. B.
Zhang
, and P.
Kim
, Phys. Rev. Lett.
98
, 206805
(2007
).4.
L.
Zhang
, Y.
Zhang
, M.
Khodas
, T.
Valla
, and I. A.
Zaliznyak
, Phys. Rev. Lett.
105
, 046804
(2010
).5.
S.
Das Sarma
, M. P.
Lilly
, E. H.
Hwang
, L. N.
Pfeiffer
, K. W.
West
, and J. L.
Reno
, Phys. Rev. Lett.
94
, 136401
(2005
).6.
V.
Juriccaronicacute
, I. F.
Herbut
, and G. W.
Semenoff
, Phys. Rev. B
80
, 081405
(2009
).7.
A.
Bostwick
, J. L.
McChesney
, K. V.
Emtsev
, T.
Seyller
, K.
Horn
, S. D.
Kevan
, and E.
Rotenberg
, Phys. Rev. Lett.
103
, 056404
(2009
).8.
O. V.
Kibis
, Phys. Rev. B
81
, 165433
(2010
).9.
S. Y.
Zhou
, D. A.
Siegel
, A. V.
Fedorov
, and A.
Lanzara
, Phys. Rev. Lett.
101
, 086402
(2008
).10.
S.
Adam
, S.
Cho
, M. S.
Fuhrer
, and S.
Das Sarma
, Phys. Rev. Lett.
101
, 046404
(2008
).11.
J. B.
Oostinga
, H. B.
Heersche
, X.
Liu
, A. F.
Morpurgo
, and L. M. K.
Vandersypen
, Nature Mater.
7
, 151
(2008
).12.
Y. J.
Shin
, G.
Kalon
, J.
Son
, J. H.
Kwon
, J.
Niu
, C. S.
Bhatia
, G.
Liang
, and H.
Yang
, Appl. Phys. Lett.
97
, 252102
(2010
).13.
Y. J.
Shin
, Y.
Wang
, H.
Huang
, G.
Kalon
, A. T.
Wee
, Z.
Shen
, C. S.
Bhatia
, and H.
Yang
, Langmuir
26
, 3798
(2010
).14.
A. F.
Morpurgo
and F.
Guinea
, Phys. Rev. Lett.
97
, 196804
(2006
).15.
J.
Moser
, A.
Barreiro
, and A.
Bachtold
, Appl. Phys. Lett.
91
, 163513
(2007
).16.
F.
Schedin
, A. K.
Geim
, S. V.
Morozov
, E. W.
Hill
, P.
Blake
, M. I.
Katsnelson
, and K. S.
Novoselov
, Nature Mater.
6
, 652
(2007
).17.
J. H.
Chen
, C.
Jang
, S.
Adam
, M. S.
Fuhrer
, E. D.
Williams
, and M.
Ishigami
, Nat. Phys.
4
, 377
(2008
).18.
J. -H.
Chen
, C.
Jang
, S.
Xiao
, M.
Ishigami
, and M. S.
Fuhrer
, Nat. Nanotechnol.
3
, 206
(2008
).19.
F. V.
Tikhonenko
, D. W.
Horsell
, R. V.
Gorbachev
, and A. K.
Savchenko
, Phys. Rev. Lett.
100
, 056802
(2008
).20.
E.
McCann
, K.
Kechedzhi
, V. I.
Fal'ko
, H.
Suzuura
, T.
Ando
, and B. L.
Altshuler
, Phys. Rev. Lett.
97
, 146805
(2006
).21.
R. V.
Gorbachev
, F. V.
Tikhonenko
, A. S.
Mayorov
, D. W.
Horsell
, and A. K.
Savchenko
, Phys. Rev. Lett.
98
, 176805
(2007
).22.
E. H.
Hwang
and S.
Das Sarma
, Phys. Rev. B
82
, 081409
(2010
).© 2011 American Institute of Physics.
2011
American Institute of Physics
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