Isotachophoresis (ITP) is a widely used nonlinear electrophoretic technique for preconcentration and separation of ionic species. Typically, ITP is performed in microchannels where the effect of surface conduction due to electric double layer (EDL) at channel walls is negligible compared to bulk conduction. However, when electrophoretic techniques such as ITP are integrated in nanochannels or shallow microchannels, surface conduction can alter bulk electrophoretic transport. The existing mathematical models for multispecies electrophoretic transport do not account for the competing effects of surface and bulk conduction. We present a mathematical model for multispecies electrophoretic transport incorporating the effects of surface conduction on bulk ion-transport. Our one-dimensional model is capable of describing electrophoretic systems consisting of arbitrarily large number of co-ions, having same charge polarity as the wall charge, and a single counter-ion. Based on numerical solutions of the governing equations, we show that unlike in conventional ITP where surface conduction is negligible, the zone concentrations do not obey the Kohlrausch regulating function when surface conduction is prominent. Moreover, our simulations show that surface conduction alters the propagation speeds of ion-concentration shock waves in ITP. In addition, surface conduction results in additional shock and expansion waves in ITP which are otherwise not present in conventional ITP.
Skip Nav Destination
ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems
July 6–9, 2015
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-5687-1
PROCEEDINGS PAPER
Effect of Surface Conduction on Propagation of Ion-Concentration Shock Waves in Isotachophoresis
Mayank Khichar,
Mayank Khichar
Indian Institute of Technology Delhi, New Delhi, India
Search for other works by this author on:
Romir Moza,
Romir Moza
Indian Institute of Technology Delhi, New Delhi, India
Search for other works by this author on:
Supreet Singh Bahga
Supreet Singh Bahga
Indian Institute of Technology Delhi, New Delhi, India
Search for other works by this author on:
Mayank Khichar
Indian Institute of Technology Delhi, New Delhi, India
Romir Moza
Indian Institute of Technology Delhi, New Delhi, India
Supreet Singh Bahga
Indian Institute of Technology Delhi, New Delhi, India
Paper No:
ICNMM2015-48089, V001T04A011; 9 pages
Published Online:
November 18, 2015
Citation
Khichar, M, Moza, R, & Bahga, SS. "Effect of Surface Conduction on Propagation of Ion-Concentration Shock Waves in Isotachophoresis." Proceedings of the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. San Francisco, California, USA. July 6–9, 2015. V001T04A011. ASME. https://doi.org/10.1115/ICNMM2015-48089
Download citation file:
13
Views
0
Citations
Related Proceedings Papers
Related Articles
Evolution of Upstream Propagating Shock Waves From a Transonic Compressor Rotor
J. Turbomach (January,2003)
Simulation of the Effects of Shock Wave Passing on a Turbine Rotor Blade
J. Eng. Gas Turbines Power (October,1985)
High-Order Eulerian Simulations of Multimaterial Elastic–Plastic Flow
J. Fluids Eng (May,2018)
Related Chapters
Thermal Interface Resistance
Thermal Management of Microelectronic Equipment
Generating Synthetic Electrocardiogram Signals Withcontrolled Temporal and Spectral Characteristics
Intelligent Engineering Systems through Artificial Neural Networks Volume 18
Vibration Analysis of the Seated Human Body in Vertical Direction
International Conference on Computer Technology and Development, 3rd (ICCTD 2011)