[1] [1] 3115.

          Sarkar R, Tiwary C, Kumbhakar P, et al. Physica E, 2008, 40(10):

[2] [2] Karar N. Solid. State Commun., 2007, 142(5): 261.

[3] [3] Jian W, Zhuang J, Zhang D, et al. Mater. Chem. Phys., 2006, 99(2-

          3): 494.

[4] [4] Kushida T, Kurita A, Watanabe M, et al. J. Lumin., 2000, 87-89:

          466.

[5] [5] Spanhel L, Haase M, Weller H, et al. J. Am. Chem. Soc., 1987, 109

          (19): 5649.

[6] [6] Lounis B, Bechtel H, Gerion D, et al. Chem. Phys. Lett., 2000, 329

          (5-6): 399.

[7] [7] Hao E, Sun H, Zhou Z, et al. Chem. Mater., 1999, 11(11): 3096.

[8] [8] Ricolleau C, Audinet L, Gandaisa M, et al. Thin Solid Films, 1998,

          336(1-2): 213.

[9] [9] Qi L, Ma J, Cheng H, et al. Colloids Surf. A, 1996, 111(3): 195.

[10] [10] 1576.

          Cumberland S, Hanif K, Javier A, et al. Chem. Mater., 2002, 14(4):

[11] [11] Reiss P, Bleuse J, Pron A. Nano. Lett., 2002, 2(7): 781.

[12] [12] Cao L, Zhang J, Ren S, et al. Appl. Phys. Lett., 2002, 80(23):

          4300.

[13] [13] 2494.

          Choi H, Ollinger Mm, Singh R. Appl. Phys. Lett., 2003, 82(15):

[14] [14] 2004, 121(20): 10233.

          Yang, H, Holloway P, Cunningham G, et al. Journal of Chem. Phys.,

[16] [16] (21): 5058.

          Karar N, Chander H, Shivaprasad S. Appl. Phys. Lettt., 2004, 85

[17] [17] Jiang D, Cao L, Su G, et al. Nanoscale Res. Lett., 2009, 4: 78.

[19] [19] Hu H, Zhang W. Opt. Mater., 2006, 28(5): 536.