[1] [1] Han X X, Xie Y, Zhao B, et al. Anal. Chem., 2010, 82(11): 4325.

[2] [2] Chen L, Han X, Yang J, et al. J. Colloid Interface Sci., 2011, 360(2): 482.

[3] [3] Xie Y, Wang X, Han X, et al. Analyst, 2010, 135(6): 1389.

[4] [4] Lin X M, Cui Y, Xu Y H, et al. Anal. Bioanal. Chem., 2009, 394(7): 1729.

[5] [5] Rycenga M, Cobley C M, Zeng J, et al. Chem. Rev., 2011, 111(6): 3669.

[6] [6] Jones M R, Osberg K D, Macfarlane R J, et al. Chem. Rev., 2011, 111(6): 3736.

[7] [7] Henry A I, Bingham J M, Ringe E, et al. J. Phys. Chem. C, 2011, 115(19): 9291.

[8] [8] Mohanty U. J. Appl. Electrochem., 2011, 41(3): 257.

[9] [9] Tognalli N G, Fainstein A, Calvo E J, et al. J. Phys. Chem. C, 2012, 116(5): 3414.

[10] [10] Haynes C L, Van Duyne R P. J. Phys. Chem. B, 2003, 107(30): 7426.

[11] [11] Kim K, Lee H B, Choi J Y, et al. J. Phys. Chem. C, 2011, 115(43): 21047.

[12] [12] Hong G, Li C, Limin Q. Adv. Funct. Mater., 2010, 20(21): 3774.

[13] [13] Huang F M, Wilding D, Speed J D, et al. Nano Lett., 2011, 11(3): 1221.