CdSe Nano-tetrapods: Controllable Synthesis, Structure Analysis, and Electronic and Optical Properties

Qi Pang , Lijuan Zhao , Yuan Cai , Duc Phuong Nguyen (1) , Nicolas Regnault (1) , Ning Wang , Shihe Yang , Weikun Ge , Robson Ferreira (1) , Gérald Bastard (1) , Jiannong Wang

1 LPA - Laboratoire Pierre Aigrain

Tetrapod-shaped CdSe nanocrystals have been successfully synthesized in high yields using a simple method of controlling the protonic acidity of the reaction system. A possible growth mechanism is discussed on the basis of the surface modification of H+ present. The crystal structure of CdSe tetrapods is determined by high-resolution transmission electron microscopy analysis to have a zinc blende core at the center with four wurtzite arms growing out from the core along four [111] directions. The electronic structure of CdSe tetrapods is studied theoretically in comparison with that of spherical dots.

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Qi Pang, Lijuan Zhao, Yuan Cai, Duc Phuong Nguyen, Nicolas Regnault, et al.. CdSe Nano-tetrapods: Controllable Synthesis, Structure Analysis, and Electronic and Optical Properties. Chemistry of Materials, 2005, 17, pp.5263. ⟨hal-00018146⟩