[1] [1] Miyaucii Y H, Chiashi S H, Murakami Y, et al. Chemical Physics Letters, 2004, 386: 89.

[2] [2] Demefitte T, Kanchanapally R, Fan Z, et a1. Analyst, 2012, 137(21): 5041.

[3] [3] Das G, Mecarini F, Gentile F, et a1. Biosensors and Bioelectronics, 2009, 24(6): 1693.

[4] [4] Fleischmann M, Hill I, Robinson J. Chemical Physics Letters, 1983, 97(4): 441.

[5] [5] Albrecht M G, Creighton J A. Journal of the American Chemical Society, 1977, 99(15): 5215.

[6] [6] Moskovits M. The Journal of Chemical Physics, 1978, 69(9): 4159.

[7] [7] Wrobel P, Antosiewicz T J, Stefaniuk T. Proc. of SPIE, 2015, 9502: 1.

[8] [8] Aslan K, Leonenko Z, Joseph R. Journal of Fluorescence, 2005, 15: 643.

[9] [9] Chen L, Zhai T, Zhang X, et al. Nanotechnology, 2014, 25: 265302.

[10] [10] Lim D K, Jeon K S, Kim H M, et al. Nature Materials, 2010, 9(1): 60.

[11] [11] Hao E, Li S, Bailey R C, et al. The Journal of Physical Chemistry B, 2004, 108(4): 1224.