[1] Alivisatos A P, Science 271, 933 (1996).

[2] Li M and Li J C, Mater. Lett. 60, 2526 (2006).

[3] Podhorodecki A, Nyk M, Kudrawiec R, Misiewicz J and Strekb W, Electrochem. Solid-State Lett. 10, H88 (2007).

[4] Dai Q Q, Kan S H, Li D M, Jiang S, Chen H Y, Zhang M Z, Gao S Y, Nie Y G, Lu H L, Qu Q L and Zou G T, Mater. Lett. 60, 2925 (2006).

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

[6] Li L S, Hu J T, Yang W D and Alivisatos A P, Nano Lett. 1, 349 (2001).

[7] Qu LH, Yu W W and Peng X G, Nano Lett. 4, 465 (2004).

[8] Sadhu S, Sen T and Patra A, Chem. Phys. Lett. 440, 121 (2007).

[9] Sapra S, Prakash A, Ghangrekar A, Periasamy N and Sarma D D, J. Phys. Chem. B 109, 1663 (2005).

[10] Gan C L, Zhang Y P, Battaglia D, Peng X G and Xiao M, Appl. Phys. Lett. 92, 241111 (2008).

[11] Dong D Q, Li L, Zhang X S, Han X and An H P, Chin. Phys. Lett. 24, 2661 (2007).

[12] Suyver J F, Wuister S F, Kelly J J and Meijerink A, Nano Lett. 1, 429 (2001).

[13] Fan Y Y, Cheng H M, Wei Y L, Su G and Shen Z H, Carbon 38, 789 (2000).

[14] Sooklal K, Cullum B S, Angel S M and Murphy C J, J. Phys. Chem. 100, 4551 (1996).

[15] Javed I, Wang B Q, Liu X G, Zhu H C, Yu D P and Yu R H, J. Nanosci. Nanotechnol. 9, 6823 (2009).

[16] Fujii K, Ishikawa T, Ohyama T, Ito K, Fujiyasu H and Kiichi T, Physica B 302-303, 312 (2001).

[17] Tripathi B, Vijay Y K, Wate S, Singh F and Avasthi D K, Solid- State Electron. 51, 81 (2007).

[18] Wu A H, Shen X H and Gao H C, J. Photochem. Photobiol. A 185, 144 (2007).