Growth kinetics of CdSe nanoparticles synthesized in reverse micelles using bis(trimethylsilyl) selenium precursor

• Authors: Saim Emin , Ceco Dushkin , Seiichiro Nakabayashi , Eiki Adachi
• Languages of publication: EN

Abstracts

EN

We first focus on the kinetics of nanoparticle growth in a microemulsion synthesis of CdSe semiconductor nanocrystals. The process consists of a fast initial stage of typical time constant of the order of 103 s followed by a slow stage of time constant of the order of 104s. Growth proceeds similarly to that described for the hot-matrix synthesis of CdSe, underlining the generality of the two-stage growth mechanism, irrespective of the matrix type and synthesis conditions. However, the time constant of each stage in the microemulsion synthesis is much larger than in the hot-matrix one. Also, the ratio between the fast and slow time constant is appreciably bigger. We also prove that larger size reverse micelles, obtained by increasing the water:surfactant ratio, generally lead to larger CdSe nanoparticles. Bis(trimethylsilyl) selenium is the crucial precursor for the CdSe nanoparticle synthesis. An intermediate stage of the chemical reaction limiting the bis(trimethylsilyl) selenium production is described theoretically. [...]

Keywords

EN

CdSe nanoparticles; kinetics of growth; AOT microemulsion; bis(trimethylsilyl)selenium; NMR spectra; FTIR spectra

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2007
• Volume: 5
• Issue: 2
• Pages: 590-604

Dates

published

1 - 6 - 2007

online

1 - 6 - 2007

Contributors

author

Saim Emin

author

Ceco Dushkin

• Laboratory of Nanoparticle Science and Technology, Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Sofia, Sofia, 1164, Bulgaria

author

Seiichiro Nakabayashi

• Department of Chemistry, Faculty of Science, Saitama University, Saitama, 338-8570, Japan

author

Eiki Adachi

• Advanced Research Center, Nihon l’Oreal R&D Center, Takatsu-ku, Kawasaki, Kanagawa, 213-0012, Japan

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Identifiers

DOI

10.2478/s11532-007-0018-8