Nguyen Thi Luyen, Nguyen Xuan Nghia, Nguyen Kien Cuong, Nguyen Thi Thuy Lieu

Main Article Content

Abstract

Abstract: Colloidal CdSe/CdSe1-xSx heterostructure nanorods were synthesized by the seeded growth method. By changing the temperature, type of ligand, we synthesized the Wz-CdSe nanocrystals as seeds for growth of CdSe/CdSe1-xSx heterostructure nanorods. The yield of heterostructure nanorods depend on the amount of oleylamine in the reaction mixture. Their morphology, crystalline structure and optical properties were investigated by transmission electron microscopy, X-ray diffraction, optical absorption and photoluminescence spectroscopy.

Keywords: heterostructure nanorods, oleylamine, photoluminescence.

References

[1] L. Carbone, K. Kudera, E. Carlino, W. J. Parak, C. Giannini, R. Cingolani and L. Manna, Multiple wurtzite twinning in CdTe nanocrystals induced by methylphosphonic acid, J. Am. Chem. Soc. 128 (2006) 748.
[2] L. Manna, E. C. Scher, L. S. Li and A. P. Alivisatos, Epitaxial growth and photochemical annealing of graded CdS/ZnS shells on colloidal CdSe nanorods, J. Am. Chem. Soc. 124 (2002) 7136.
[3] Y. Jun, J. Lee, J. Choi and J. Cheon, Symmetry-Controlled Colloidal Nanocrystals: Nonhydrolytic Chemical Synthesis and Shape Determining Parameters, J. Phys. Chem. B 109 (2005) 14795.
[4] B. Mahler, N. Lequeux and B. Dubertret, Ligand–controlled polytypism of thick-shell CdSe/CdS nanocrytals, J. Am. Chem. 132 (2010) 953.
[5] S. M. Lee, S. N. Cho and J. W. Cheon, Shape control of II-VI semiconducter nanomaterial, Adv. Mater. 15 (2003) 441.
[6] P. D. Cozzoli, L. Manna, M. L. Curri, S. Kudera, C. Giannini, M. Striccoli and A. Agostiano, Shape and phase control of colloidal ZnSe nanocrytals, Chem. Mater. 17 (2005) 1296.
[7] W. Yu, L. Qu, W. Guo and X. Peng, Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals, Chem. Mater. 15 (2003) 2854.
[8] Y. H. Kim, Y. W. Jun, B. H. Jun, S. M. Lee and J. Cheon, Sterically Induced Shape and Crystalline Phase Control of GaP Nanocrystals, J. Am. Chem.Soc. 124 (2002) 13656.
[9] X. Peng, Mechanisms for the Shape-Control and Shape-Evolution of colloidal Semiconductors Nanocrystals, Adv. Mater. 15 (2003) 459.
[10] J. H. Yu, H. M. Park and S. C. Kim, Synthesis of quantums-sized cubic ZnS nanorods by oriented attachment mechanism J. Am. Chem. 127 (2005) 5662.