Issue 3, 2008
From the journal:

Lab on a Chip

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

Hongwei Yang,a   Weiling Luan,*a   Shan-tung Tua  and  Zhiming M Wang*b  

* Corresponding authors

a School of Mechanical and Power Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, P.R.China
E-mail: luan@ecust.edu.cn
Fax: +86-21-64253513

b Materials Research Science and Engineering Center, University of Arkansas, Fayetteville, USA
E-mail: zmwang@uark.edu
Fax: +1-479-575-4580
Tel: +1-479-575-4217

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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Article information

DOI
https://doi.org/10.1039/B715540A
Article type
Paper
Submitted
09 Oct 2007
Accepted
14 Dec 2007
First published
15 Jan 2008

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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