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Issue 3, 2008
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Synthesis of nanocrystalsvia microreaction with temperature gradient: towards separation of nucleation and growth

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Abstract

By utilizing the symmetrical temperature distribution in a tube furnace chamber, a capillary microreactor was designed with the microchannel passing two well-controlled, stable temperatures in steep temperature gradients. The two-temperature microreator, first developed and implemented by this research team, provides an opportunity to separate the nucleation and growth of semiconductor nanocrystals, leading to better control of nucleation and growth kinetics. For the synthesis of CdSe nanocrystals as a model system, we demonstrated the improved size uniformity achieved by the two-temperature approach, confirming the success of the use of high temperature to burst nucleation and low temperature to promote growth.

Graphical abstract: Synthesis of nanocrystalsvia microreaction with temperature gradient: towards separation of nucleation and growth

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Publication details

The article was received on 09 Oct 2007, accepted on 14 Dec 2007 and first published on 15 Jan 2008


Article type: Paper
DOI: 10.1039/B715540A
Citation: Lab Chip, 2008,8, 451-455
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    Synthesis of nanocrystalsvia microreaction with temperature gradient: towards separation of nucleation and growth

    H. Yang, W. Luan, S. Tu and Z. M. Wang, Lab Chip, 2008, 8, 451
    DOI: 10.1039/B715540A

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