CdSe quantum dots (QDs) (2 - 3 nm) were synthesized by chemical precipitation method. Optical and structure properties of the products were investigated by scanning tunneling microscope (STM), X-ray diffraction (XRD), and ultra violet-visible (UV-Vis) spectrophotometer. The results show that high-quality cubic CdSe QDs were obtained. It is also obtained that temperature is one of the most important factors the affect on the particle size and optical properties of the prepared QDs samples.
 Gh. R. Amiri, M. H. Yousefi, M. R. Aboulhassani, M. H. Keshavarz, D. Shahbazi, S. Fatahian, M. Alahi, “Radar Absorption of Ni0.7Zn0.3Fe2O4 Nanoparticles,” Digest Journal of Nanomaterials and Biostructures, Vol. 5, No. 3, 2010, p. 1025.
 H. Nathani, S. Gubbala, R. D. K. Misra and J. Mater, “Magnetic Behavior of Nanocrystalline Nickel Ferrite: Part I. The Effect of Surface Roughness,” Materials Sci ence and Engineering: B, Vol. 121, No. 1-2, 2005, pp. 126-136. doi:10.1016/j.mseb.2005.03.016
 M. M. Hessien, J. Magn, “Synthesis and Characterization of Lithium Ferrite by Oxalate Precursor Route,” Journal of Magnetism and Magnetic Materials, Vol. 320, No. 21, 2004, pp. 2800-2807. doi:10.1016/j.jmmm.2008.06.018
 Gh. R. Amiri, M. H. Yousefi, M. R. Aboulhassani, M. H. Keshavarz, S, Manouchehri and S. Fatahian, “Magnetic Properties and Microwave Absorption in Ni-Zn and Mn-Zn Ferrite Nanoparticles Synthesized by Low-Tem perature Solid-State Reaction,” Journal of Magnetism and Magnetic Materials, Vol. 323, 2011, p. 730
 A. R. Jelvani, Gh. R. Amiri, S. Fatahian, S. Manouchehri, M. Habibi, R. Mousarezaei, “Magnetic Properties Comparison of Co0.5Zn0.5Fe2O4 Nanoparticles Prepared by Different Methods,” Journal of Optoelectronics and Advanced Materials-Rapid Communications, Vol. 5, No. 11, 2011, pp. 1216-1218.
 Gh. R. Amiri, S. Fatahian, A. R. Jelvani, R. Mousarezaei, M. Habibi, “Magnetic Properties of CoFe2O4 and Co0.5 Zn0.5Fe2O4 Ferrite Nanoparticles Synthesized by Mi crowave Method,” Journal of Optoelectronics and Ad vanced Materials-Rapid Communications, Vol. 5, No. 11, 2011, pp. 1178-1180.
 S. Fatahian, D. Shahbazi, M. Pouladian, M. H. Yousefi, Gh. R. Amiri, Z. Shahi, H. Jahanbakhsh, “Preparation and Magnetic Properties Investigation of FE3O4 Nanoparticles 99mTc Labeled and FE3O4 Nanoparticles Dmsa Coated,” Digest Journal of Nanomaterials and Biostructures, Vol. 6, No. 3, 2011, pp. 1161-1165.
 A. Aurobinda, S. Sarmistha, B. Selvaraju and R. Gouri Sankar, “Effect of Doping on Nano Cadmium-Selenide (CdSe)-Assessment Through UV-VIS Spectroscopy,” Latin-American Journal of Physics Education, Vol. 5, No. 1, 2011.