Enhanced ripening behavior of Mg-doped CdSe quantum dots

Research output: Contribution to journalArticle

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Abstract

Pure CdSe and Mg-doped CdSe nanocrystal quantum dots were synthesized into the zinc-blende structure at a low temperature by the inverse micelle technique using paraffin oil and oleic acid as surface capping agents. The ripening behavior of the nanocrystals was monitored using the red shift in ultraviolet (UV)-visible light absorption peaks, and their size variation was estimated using the so-called, quantum confinement theory. The Lifshitz-Slyozov-Wagner (LSW) kinetics analyses were performed based on the variation in size according to the ripening temperature and time period. The activation energy (Q) and reaction rate constant (Ko) were determined for the ripening reaction using Arrhenius-type plots. The kinetics analyses reveal that the volume diffusion through the liquid-phase solution is the governing mechanism for the ripening of both nanocrystals. The Mg-doped CdSe nanocrystals showed enhanced ripening kinetics due to the low activation energy for the volume diffusion.

Original languageEnglish
Pages (from-to)1916-1921
Number of pages6
JournalJournal of Materials Research
Volume23
Issue number7
DOIs
Publication statusPublished - 2008 Jul 1

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Nanocrystals
Semiconductor quantum dots
nanocrystals
quantum dots
Kinetics
kinetics
Activation energy
Paraffin oils
activation energy
Quantum confinement
oleic acid
Oleic acid
Micelles
paraffins
Oleic Acid
electromagnetic absorption
red shift
Light absorption
Reaction rates
Zinc

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Enhanced ripening behavior of Mg-doped CdSe quantum dots. / Sung, Yun Mo; Kwak, Woo Chul; Kim, Woong; Kim, Tae Geun.

In: Journal of Materials Research, Vol. 23, No. 7, 01.07.2008, p. 1916-1921.

Research output: Contribution to journalArticle

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