Synthesis of Mn-doped zinc blende CdSe nanocrystals

CdSe colloidal nanocrystals (similar to 3.7 nm) with zinc blende structure were synthesized at a low temperature via an inverse micelle technique. They were successfully doped with similar to 4 at. % Mn, which was examined using inductively coupled plasma atomic emission spectroscopy. In spite of larger particle size (similar to 4.1 nm), the Mn-doped CdSe nanocrystals showed an apparent blueshift in the UV-visible spectroscopy light absorption peaks. Considering the nanoparticle size and the effective energy band gap, the increase in the bulk energy band gap was estimated in the Mn-doped CdSe nanocrystals, which provides an obvious evidence of true Mn doping in the CdSe lattices. (c) 2007 American Institute of Physics.