A stable droplet reactor for high temperature nanocrystal synthesis
| Autor: | John C. deMello, R. McIntyre, Deborah Berhanu, Eugenia Valsami-Jones, Christopher J. Drury, Adrian M. Nightingale, Siva H. Krishnadasan, Xize Niu |
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| Rok vydání: | 2011 |
| Předmět: |
Continuous operation
Chemistry Capillary action technology industry and agriculture Biomedical Engineering Analytical chemistry Nanoparticle Bioengineering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Residence time (fluid dynamics) complex mixtures 7. Clean energy 01 natural sciences Biochemistry 0104 chemical sciences Nanocrystal Volume (thermodynamics) Reagent Emission spectrum 0210 nano-technology |
| Zdroj: | Lab Chip. 11:1221-1227 |
| ISSN: | 1473-0189 1473-0197 |
| DOI: | 10.1039/c0lc00507j |
| Popis: | 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 (TiO(2)) 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. |
| Databáze: | OpenAIRE |
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