The effect of underlayer thin films on the sensitivity of Ag nanorod surface-enhanced Raman scattering (SERS) substrates was studied both theoretically and experimentally. With the same Ag nanorod film, different materials (Ag, Al, Si, and Ti) with different thicknesses (25, 100, and 400 nm) were used as underlayers to alter the reflectivity systematically. The SERS intensity was found to increase linearly with the underlayer reflectivity, which can be explained by a modified Greenler’s model due to the contribution of reflected electric field from the substrate. This finding can be used to design high enhancement SERS substrates.
REFERENCES
1.
S.
Shanmukh
, L.
Jones
, J.
Driskell
, Y. -P.
Zhao
, R.
Dluhy
, and R. A.
Tripp
, Nano Lett.
6
, 2630
(2006
).2.
T.
Vo-Dinh
, D. L.
Stokes
, G. D.
Griffin
, M.
Volkan
, U. J.
Kim
, and M. I.
Simon
, J. Raman Spectrosc.
30
, 785
(1999
).3.
K. I.
Mullen
and K. T.
Carron
, Anal. Chem.
63
, 2196
(1991
).4.
J. M.
Bello
, V. A.
Narayanan
, D. L.
Stokes
, and T.
Vo-Dinh
, Anal. Chem.
62
, 2437
(1990
).5.
C.
Viets
and W.
Hill
, Sens. Actuators B
51
, 92
(1998
).6.
L. -P.
Choo-Smith
, H. G. M.
Edwards
, H. P.
Endtz
, J. M.
Kros
, F.
Heule
, H.
Barr
, J. S.
Robinson
, Jr., H. A.
Bruining
, and G. J.
Puppels
, Biopolymers
67
, 1
(2002
).7.
M. G.
Shim
and B. C.
Wilson
, J. Raman Spectrosc.
28
, 131
(1997
).8.
H.
Xu
, E. J.
Bjerneld
, M.
Käll
, and L.
Börjesson
, Phys. Rev. Lett.
83
, 4357
(1999
).9.
S.
Nie
and S. R.
Emory
, Science
275
, 1102
(1997
).10.
K.
Kneipp
, Y.
Wang
, H.
Kneipp
, L. T.
Perelman
, I.
Itzkan
, R. R.
Dasari
, and M. S.
Feld
, Phys. Rev. Lett.
78
, 1667
(1997
).11.
C. L.
Leverette
, V. A.
Shubert
, T. L.
Wade
, K.
Varazo
, and R. A.
Dluhy
, J. Phys. Chem. B
106
, 8747
(2002
).12.
H.
Li
and B. M.
Cullum
, Appl. Spectrosc.
59
, 410
(2005
).13.
H. G.
Li
, C. E.
Baum
, J.
Sun
, and B. M.
Cullum
, Appl. Spectrosc.
60
, 1377
(2006
).14.
Y. A.
Yang
, A. M.
Bittner
, and K.
Kern
, J. Solid State Electrochem.
11
, 150
(2007
).15.
S. P.
Mulvaney
, L.
He
, M. J.
Natan
, and C. D.
Keating
, J. Raman Spectrosc.
34
, 163
(2003
).16.
J. D.
Driskell
, S.
Shanmukh
, Y. -J.
Liu
, S. B.
Chaney
, X. -J.
Tang
, Y. -P.
Zhao
, and R. A.
Dluhy
, J. Phys. Chem. C
112
, 895
(2008
).17.
J. D.
Driskell
, R. J.
Lipert
, and M. D.
Porter
, J. Phys. Chem. B
110
, 17444
(2006
).18.
C. J.
Addison
and A. G.
Brolo
, Langmuir
22
, 8696
(2006
).19.
A. K.
Misra
, S. K.
Sharma
, L.
Kamemoto
, P. V.
Zinin
, Q. G.
Yu
, N. J.
Hu
, and L.
Melnick
, Appl. Spectrosc.
63
, 373
(2009
).20.
L. C. T.
Shoute
, A. J.
Bergren
, A. M.
Mahmoud
, K. D.
Harris
, and R. L.
McCreery
, Appl. Spectrosc.
63
, 133
(2009
).21.
Y. -J.
Liu
and Y. -P.
Zhao
, Phys. Rev. B
78
, 075436
(2008
).22.
G. B.
Smith
, Appl. Opt.
29
, 3685
(1990
).23.
C. L.
Mitsas
and D. I.
Siapkas
, Appl. Opt.
34
, 1678
(1995
).24.
J. -X.
Fu
, B.
Park
, and Y. -P.
Zhao
, Appl. Opt.
48
, 4637
(2009
).25.
26.
S. B.
Chaney
, S.
Shanmukh
, R. A.
Dluhy
, and Y. -P.
Zhao
, Appl. Phys. Lett.
87
, 031908
(2005
).27.
J. L.
Abell
, J. D.
Driskell
, R. A.
Dluhy
, R. A.
Tripp
, and Y. -P.
Zhao
, Biosens. Bioelectron.
24
, 3663
(2009
).28.
W. -H.
Yang
, J.
Hulteen
, G. C.
Schatz
, and R. P.
VanDuyne
, J. Chem. Phys.
104
, 4313
(1996
).© 2010 American Institute of Physics.
2010
American Institute of Physics
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