Microchannel mixers enable faster mixing times compared with batch stir mixing leading to the promise of higher throughput, better yields and less solvent usage for the solution-phase reactive precipitation of inorganic nanoparticles. However, reliance on diffusive transport for subsecond mixing requires channel dimensions in the tens of micrometers. These channel dimensions make diffusive micromixers vulnerable to clogging. In this paper, an oscillatory flow mixing strategy is explored to increase the contact area between reagents within larger microchannels. Forward and reverse oscillatory signals are designed to pump reactants through a 450 μm high serpentine microchannel to increase advection within the flow. Computational fluid dynamics simulations are performed to provide insight into flow behavior and nanoparticle morphology. Quantification of mixing performance is proposed using mixing quality and particle residence time metrics. Experimental validation is pursued through the reactive precipitation of CdS quantum dots using a reverse oscillatory mixing setup. Transmission electron microscopy provides insights into the particle size distribution and particle crystallinity.
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ASME 2011 International Manufacturing Science and Engineering Conference
June 13–17, 2011
Corvallis, Oregon, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4431-1
PROCEEDINGS PAPER
Cadmium Sulfide Nanoparticle Synthesis Using Oscillatory Flow Mixing
Barath Palanisamy
,
Barath Palanisamy
Oregon State University, Corvallis, OR
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Yu-Wei Su
,
Yu-Wei Su
Oregon State University, Corvallis, OR
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Anna Garrison
,
Anna Garrison
Oregon State University, Corvallis, OR
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Brian Paul
,
Brian Paul
Oregon State University, Corvallis, OR
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Chih-hung Chang
Chih-hung Chang
Oregon State University, Corvallis, OR
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Barath Palanisamy
Oregon State University, Corvallis, OR
Yu-Wei Su
Oregon State University, Corvallis, OR
Anna Garrison
Oregon State University, Corvallis, OR
Brian Paul
Oregon State University, Corvallis, OR
Chih-hung Chang
Oregon State University, Corvallis, OR
Paper No:
MSEC2011-50276, pp. 591-598; 8 pages
Published Online:
September 14, 2011
Citation
Palanisamy, B, Su, Y, Garrison, A, Paul, B, & Chang, C. "Cadmium Sulfide Nanoparticle Synthesis Using Oscillatory Flow Mixing." Proceedings of the ASME 2011 International Manufacturing Science and Engineering Conference. ASME 2011 International Manufacturing Science and Engineering Conference, Volume 2. Corvallis, Oregon, USA. June 13–17, 2011. pp. 591-598. ASME. https://doi.org/10.1115/MSEC2011-50276
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