Sequential Growth of Magic-Size CdSe Nanocrystals

Authors


  • S. Kudera and M. Zanella contributed equally to this work. This work was supported by the European projects SA-NANO (contract number STRP 013698) and OLLA (contract number IST 004607), by the Italian MIUR 297 project (contract number 13587) by the Italian project FIRB NG-lab (contract number RBLA03ER38) and by the German research foundation (DFG, Emmy Noether program). We acknowledge Dr. Davide Cozzoli, Dr. Elvio Carlino, and Hermann Gumpp for many inspiring discussions. Supporting information is available online from Wiley InterScience or from the author.

Abstract

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CdSe nanocrystals of well-defined sizes (so-called magic-size clusters, MSCs) have been grown with progressively larger sizes. During the synthesis, the relative populations of the different families of MSCs vary, as smaller clusters evolve into larger clusters. The time evolution of the various MSCs (see figure) is modeled by taking into account their much higher stability over nanocrystals of any intermediate size. A blue-light-emitting diode based on these MSCs is also presented.

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