Controlled synthesis of monodisperse nanocrystals by a two-phase approach without the separation of nucleation and growth processes

Daocheng Pan, Qiang Wang, Lijia An

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The synthesis of monodisperse nanocrystals is an important topic in the field of nanomaterials not only for practical applications, but also for scientific interest in fundamental research. In this feature article, we mainly focus on synthesis of monodisperse nanocrystals by a two-phase approach without the separation of nucleation and growth processes, and report some progress made recently in the observation and understanding of nucleation and growth of semiconductor nanocrystals. Firstly, a novel two-phase approach to monodisperse nanocrystals, which is different from the well-established synthesis models, is discussed. We demonstrate that the two-phase approach has a quite lengthy nucleation process, and can be applied to the synthesis of many kinds of binary monodisperse nanocrystals. Then, we provide a summary of recent research progress in the observation and understanding of nucleation and growth of semiconductor nanocrystals in one-phase and two-phase systems, and compare the nucleation and growth mechanisms of the two kinds of reaction systems. Although the lengthy nucleation process of the two-phase approach enables researchers to capture some useful information about the nucleation and growth processes, and the nucleation and growth processes have been studied by optical absorption spectra and transmission electron microscopy, there is little or no experimental data available on the atomic configurations of critical nuclei. Finally, the current difficulties and future challenges in synthesis and structural characterization of critical nuclei are presented.

Original languageEnglish (US)
Pages (from-to)1063-1073
Number of pages11
JournalJournal of Materials Chemistry
Volume19
Issue number8
DOIs
StatePublished - Feb 17 2009

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Nanocrystals
Nucleation
Semiconductor materials
Nanostructured materials
Light absorption
Absorption spectra
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

Cite this

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abstract = "The synthesis of monodisperse nanocrystals is an important topic in the field of nanomaterials not only for practical applications, but also for scientific interest in fundamental research. In this feature article, we mainly focus on synthesis of monodisperse nanocrystals by a two-phase approach without the separation of nucleation and growth processes, and report some progress made recently in the observation and understanding of nucleation and growth of semiconductor nanocrystals. Firstly, a novel two-phase approach to monodisperse nanocrystals, which is different from the well-established synthesis models, is discussed. We demonstrate that the two-phase approach has a quite lengthy nucleation process, and can be applied to the synthesis of many kinds of binary monodisperse nanocrystals. Then, we provide a summary of recent research progress in the observation and understanding of nucleation and growth of semiconductor nanocrystals in one-phase and two-phase systems, and compare the nucleation and growth mechanisms of the two kinds of reaction systems. Although the lengthy nucleation process of the two-phase approach enables researchers to capture some useful information about the nucleation and growth processes, and the nucleation and growth processes have been studied by optical absorption spectra and transmission electron microscopy, there is little or no experimental data available on the atomic configurations of critical nuclei. Finally, the current difficulties and future challenges in synthesis and structural characterization of critical nuclei are presented.",
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Controlled synthesis of monodisperse nanocrystals by a two-phase approach without the separation of nucleation and growth processes. / Pan, Daocheng; Wang, Qiang; An, Lijia.

In: Journal of Materials Chemistry, Vol. 19, No. 8, 17.02.2009, p. 1063-1073.

Research output: Contribution to journalArticle

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