Preparation of Uncapped CdSe1-xSx Semiconducting Nanocrystals by Mechanical Alloying
Composition-tunable ternary CdSe1-xSxnanocrystals are among the most extensively studied alloyed semiconducting quantum dots. They are, however, almost exclusively prepared by wet chemical routes which lead to surface-capped nanoparticles. Herein, we show that simple mechanical alloying can be applied to prepare uncapped CdSe1-xSxnanocrystals through the entire composition range. the resulting nanocrystals have average sizes smaller than 9 nm, are chemically homogenous, and show a linear lattice parameter-composition and close-to-linear band gap-composition relationships, demonstrating the ability for band gap engineering through composition tuning.
G. Tan et al., "Preparation of Uncapped CdSe1-xSx Semiconducting Nanocrystals by Mechanical Alloying," Journal of Applied Physics, vol. 110, no. 12, American Institute of Physics (AIP), Jan 2011.
The definitive version is available at http://dx.doi.org/10.1063/1.3669443
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