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Study on Growth Kinetics of CdSe Nanocrystals with a New Model

Author(s): Su Huaipeng | Dixon JohnDavid | Wang Andrew | Low Jeremy | Xu Jian | Wang Jingkang

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 5;
Issue: 5;
Start page: 823;
Date: 2010;
Original page

Keywords: Growth kinetics | Semiconductor nanocrystals | Model | CdSe | Ostwald ripening

Abstract A model which involves both bulk diffusion process and surface reaction process has been developed for describing the growth behaviour of nanoparticles. When the model is employed, hypothesising that either of the processes alone dominates the overall growth process is unnecessary. Conversely, the relative magnitude of contributions from both processes could be obtained from the model. Using this model in our system, the growth process of CdSe QDs demonstrated two different growth stages. During the first stage, the growth of CdSe QDs was dominated by bulk diffusion, whereas, neither the bulk diffusion process nor the surface reaction process could be neglected during the later stage. At last, we successfully modelled the Ostwald ripening of CdSe QDs with LSW theories.

Tango Jona
Tangokurs Rapperswil-Jona

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