We have investigated the surface enhanced Raman scattering (SERS) from Au nanocombs and nanorods under different excitation conditions. The SERS intensity from nanocombs is always larger than that from nanorods, but the polarized SERS dependence is similar for the two nanostructures. These results agree quantitatively well with the local -field calculations, and the nanospine in the nanocomb increases the local -field over all surfaces of the nanocomb structure. The combination of experimental and numerical results predicts that the Raman enhancement at 633 nm excitation is estimated to be from seven to eight times that at 785 nm excitation.
REFERENCES
1.
M.
Moskovits
, J. Raman Spectrosc.
36
, 485
(2005
).2.
G. C.
Schatz
and R. P. V.
Duyne
, Handbook of Vibrational Spectroscopy
(Wiley
, Chichester
, 2002
).3.
A.
Campion
and P.
Kambhampati
, Chem. Soc. Rev.
27
, 241
(1998
).4.
M.
Moskovits
, Rev. Mod. Phys.
57
, 783
(1985
).5.
J. J.
Mock
, M.
Barbic
, D. R.
Smith
, D. A.
Schultz
, and S.
Schultz
, J. Chem. Phys.
116
, 6755
(2002
).6.
Y.
Lu
, G. L.
Liu
, and L. P.
Lee
, Nano Lett.
5
, 5
(2005
).7.
H.
Xu
, J.
Aizpurua
, M.
Käll
, and P.
Apell
, Phys. Rev. E
62
, 4318
(2000
).8.
K.
Kneipp
, Y.
Wang
, H.
Kneipp
, L. T.
Perelman
, I.
Itzkan
, R. R.
Dasari
, and M. S.
Feld
, Phys. Rev. Lett.
78
, 1667
(1997
).9.
S.
Nie
and S. R.
Emory
, Science
275
, 1102
(1997
).10.
M.
Kahl
, E.
Voges
, S.
Kostrewa
, C.
Viets
, and W.
Hill
, Sens. Actuators B
51
, 285
(1998
).11.
N.
Felidj
, J.
Aubard
, G.
Levi
, J. R.
Krenn
, A.
Hohenau
, G.
Schider
, A.
Leitner
, and F. R.
Aussenegg
, Appl. Phys. Lett.
82
, 3095
(2003
).12.
M. A.
De Jesús
, K. S.
Giesfeldt
, J. M.
Oran
, N. A.
Abu-Hatab
, N. V.
Lavrik
, and M. J.
Sepaniak
, Appl. Spectrosc.
59
, 1501
(2005
).13.
A. D.
McFarland
, M. A.
Young
, J. A.
Dieringer
, and R. P.
VanDuyne
, J. Phys. Chem. B
109
, 11279
(2005
).14.
R.
Bukasov
and J. S.
Shumaker-Parry
, Nano Lett.
7
, 1113
(2007
).15.
K.
Li
, L.
Clime
, B.
Cui
, and T.
Veres
, Nanotechnology
19
, 145305
(2008
).16.
S. B.
Chaney
, S.
Shanmukh
, R. A.
Dluhy
, and Y. -P.
Zhao
, Appl. Phys. Lett.
87
, 031908
(2005
).17.
S.
Shanmukh
, L.
Jones
, J.
Driskell
, Y. -P.
Zhao
, R.
Dluhy
, and R. A.
Tripp
, Nano Lett.
6
, 2630
(2006
).18.
Y. -J.
Liu
, J. -G.
Fan
, Y. -P.
Zhao
, S.
Shanmukh
, and R. A.
Dluhy
, Appl. Phys. Lett.
89
, 053117
(2006
).19.
Y. -J.
Liu
and Y. -P.
Zhao
, Phys. Rev. B
78
, 075436
(2008
).20.
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
).21.
X. M.
Qian
and S. M.
Nie
, Chem. Soc. Rev.
37
, 912
(2008
).22.
H. B.
Lueck
, D. C.
Daniel
, and J. L.
McHale
, J. Raman Spectrosc.
24
, 363
(1993
).23.
D. A.
Weitz
, S.
Garoff
, J. I.
Gersten
, and A.
Nitzan
, J. Chem. Phys.
78
, 5324
(1983
).24.
R. J.
Hinde
, M. J.
Sepaniak
, R. N.
Compton
, J.
Nordling
, and N.
Lavrik
, Chem. Phys. Lett.
339
, 167
(2001
).25.
S.
Mahajan
, J. J.
Baumberg
, A. E.
Russell
, and P. N.
Bartlett
, Phys. Chem. Chem. Phys.
9
, 6016
(2007
).26.
E. V.
Efremov
, F.
Ariese
, and C.
Gooijer
, Anal. Chim. Acta
606
, 119
(2008
).© 2009 American Institute of Physics.
2009
American Institute of Physics
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