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Electrokinetics of Nanochannels: The Next Nanotechnology for Ion/Molecule/Nanocolloid Sensing, Concentration and Filtration FREE

[+] Author Affiliations
Hsueh-Chia Chang

University of Notre Dame, Notre Dame, IN

Paper No. ICNMM2009-82128, pp. 1221; 1 page
doi:10.1115/ICNMM2009-82128
From:
  • ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels
  • ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels
  • Pohang, South Korea, June 22–24, 2009
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 978-0-7918-4349-9 | eISBN: 978-0-7918-3850-1
  • Copyright © 2009 by ASME

abstract

Because nanochannels act as lenses that can focus electric fields on a chip, they can concentrate and filter ions, molecules and nanocolloids by ion selectivity, electrodeless dielectrophoresis and surface hybridization. However, before fabricated nanochannels can lead to the next-generation of chip-scale dialysis membranes, preconcentrators for mass spectrometers, ion sieves, molecular sensors, solar/fuel cell membranes etc, the anomalous dc I-V characteristics and ac impedance of such nanochannels must be understood. Curious phenomena such as limiting and over-limiting currents, rectification, hysteretic cyclic voltametry, Warburg impedance, channel cross-talk etc will be studied with fabricated nanochannels, confocal microscopy and fluorescence correlation spectroscopy and analyzed mathematically with fundamental Nernst-Planck ion transport theories, Guoy-Chapman equilibrium electrolyte theories and new non-equilibrium extended polarization theories.

Copyright © 2009 by ASME
This article is only available in the PDF format.

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