1. Department of Applied Physics, School of Science and Art, Hangzhou Institude of Electronic Engineering, Hangzhou 310037, China 2. Department of Chemistry, Zhejiang University, Hangzhou 310027, China
Abstract:Polyvinylpyrrolidone(PVP)-modified CdS nanorods were prepared by a hydrothermal reaction of CdCl2·2.5H2O and (NH4)2S with 10 wt% ethylenediamine aqueous solution as solvent and 1.0 wt% PVP as additives. The obtained products were characterized by means of XRD,TEM,IR,DTA-TG,UV-Vis and PL spectroscopies. The surface-modified CdS nanorods showed narrow size distribution and enhanced luminescence property compared with that of the unmodified ones. The UV-Vis spectra exhibited a structure peak. These results were attributed to the surface passivation of the CdS nanorods by the PVP molecules.
[1] Alivisatos A P, Science,1996,271:933. [2] Eychmüller A. J. Phys. Chem. B,2000,104:6514. [3] Weller H, Curr. Opin. Colloid Interface Sci.,1998,3:194. [4] Schmidt G. Chem. Rev.,1992,92:1709. [5] Lewis L N, Chem. Rev.,1993,93:2693. [6] Winiarz J G, Zhang L, Lal M, Friend C S, Prasad P N. Chem. Phys.,1999,245:417. [7] Qi L, Clfen H, Antonietti M. Nano. Lett.,2001,1:61. [8] Sapra S, Nanda J, Sarma DD, Abed F E1-A1, Hodes G. Chem. Commun.,2001,2188. [9] Guo Lin, Yang Shi-he, et al. Appl. Phys. Lett.,2000,76(20):2901. [10] Liu SH, Qian XF, Yin J. Journal of Physics and Chemistry of Solids,2003,64:455. [11] Sooklal K, Hanus LH, Ploehn HJ, Murphy CJ. Adv. Mater.,1998,10:1083. [12] Kuno M, Lee JK, Dabborsi BO, Mikulec FV, Bawend MG. J. Chem. Phys.,1997,106:9869. [13] YU Hai-yin, DU Jun, GU Jia-shan, GUAN Ming-yun, WU Zheng-cui, et al(宇海银,杜 俊,顾家山,关明云,吴正翠, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析),2004,24(2):177. [14] Cao H Q, Hu Y,Hong J M,Liu H B, Yin G, Li B L, Tie C Y, Xu Z. Adv. Mater., 2001, 13:1393. [15] Routkevitch D, Bigioni T, Moskovits M, Xu J M, et al. J. Phys. Chem., 1996, 100:14037. [16] Li Y D, Liao H W, Ding Y, Fan Y, Zhang Y, Qian Y T. Inorg. Chem., 1999, 38:1382. [17] Wang Y, Herron NJ. J. Phys. Chem.,1988,92:4988. [18] Kuczynski J, Thomas JK. J. Phys. Chem.,1985,89:720. [19] Paul OB, Nigel LP, Chem. Mater.,2001,13:3843.