Jump to main content
Jump to site search

Issue 7, 2011
Previous Article Next Article

A stable droplet reactor for high temperature nanocrystal synthesis

Author affiliations

Abstract

We report a versatile capillary-based droplet reactor for the controlled synthesis of nanoparticles over a wide range of flow conditions and temperatures. The reactor tolerates large flow-rate differentials between individual reagent streams, and allows droplet composition to be varied independently of residence time and volume. The reactor was successfully applied to the synthesis of metal (Ag), metal-oxide (TiO2) and compound semiconductor (CdSe) nanoparticles, and in each case exhibited stable droplet flow over many hours of operation without fouling, even for reactions involving solid intermediates. For CdSe formed by the reaction of Cd oleate and Se, highly controlled growth could be achieved at temperatures of up to 250 °C, with emission spectra varying smoothly and reproducibly with temperature and flow-rate. The droplet reactor showed exceptional stability when operated under constant flow-rate and temperature conditions, yielding particles with well-defined band-edge emission spectra that did not vary over the course of a full day’s continuous operation.

Graphical abstract: A stable droplet reactor for high temperature nanocrystal synthesis

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Oct 2010, accepted on 24 Nov 2010 and first published on 23 Dec 2010


Article type: Paper
DOI: 10.1039/C0LC00507J
Citation: Lab Chip, 2011,11, 1221-1227
  •   Request permissions

    A stable droplet reactor for high temperature nanocrystal synthesis

    A. M. Nightingale, S. H. Krishnadasan, D. Berhanu, X. Niu, C. Drury, R. McIntyre, E. Valsami-Jones and J. C. deMello, Lab Chip, 2011, 11, 1221
    DOI: 10.1039/C0LC00507J

Search articles by author

Spotlight

Advertisements