The conducting Taylor cone can activate specified harmonics of Laplace equation near the cone and can generate field maxima at multiple discrete polar angles. As the nanocolloids are ejected out from the cone tip, the difference of dominating forces in axial and transverse direction defines size-dependent initial angle before the colloids are trapped by the field maxima of the harmonics at the closest polar angle. This size-dependent selection of harmonics governs the different size colloids to travel along different trajectories and form separated deposition in the downstream of the electrospray. This electrospray-based separation of nanocolloids is successfully used to detect DNA hybridization. A family of cone shape is generated by changing voltage in a finite range. Variation of Taylor cone angle changes the harmonics and the trajectory of colloid is found to shift to a larger polar angle under higher voltage.
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ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer
December 18–21, 2009
Shanghai, China
Conference Sponsors:
- Nanotechnology Institute
ISBN:
978-0-7918-4389-5
PROCEEDINGS PAPER
Separation of Nanocolloids by Taylor Cone Harmonics
Xinguang Cheng,
Xinguang Cheng
University of Notre Dame, Notre Dame, IN
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Satyajyoti Senapati,
Satyajyoti Senapati
University of Notre Dame, Notre Dame, IN
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Hsueh-Chia Chang
Hsueh-Chia Chang
University of Notre Dame, Notre Dame, IN
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Xinguang Cheng
University of Notre Dame, Notre Dame, IN
Satyajyoti Senapati
University of Notre Dame, Notre Dame, IN
Hsueh-Chia Chang
University of Notre Dame, Notre Dame, IN
Paper No:
MNHMT2009-18060, pp. 633-638; 6 pages
Published Online:
October 26, 2010
Citation
Cheng, X, Senapati, S, & Chang, H. "Separation of Nanocolloids by Taylor Cone Harmonics." Proceedings of the ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer, Volume 1. Shanghai, China. December 18–21, 2009. pp. 633-638. ASME. https://doi.org/10.1115/MNHMT2009-18060
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