11. A cloud of electrons will surround any charge with an approximate radius known as the Debye length . 12. There are also general electroacoustic theories that are valid for any values of Debye length and Dukhin number. 13. The upper cut-off to the impact parameter should thus be approximately equal to the Debye length : 14. This is important in concentrated dispersions and emulsions when distances between particles become comparable with the Debye length . 15. When there is an increased salt concentration in the lumen of the capillary, the debye length decreases. 16. However, Debye length must be important for electrophoresis, as follows immediately from the Figure on the right. 17. This model is valid for most aqueous systems, where the Debye length is usually only a few nanometers. 18. As salt concentration increases, the Debye length decreases due to the ions in solution screening the surface charge. 19. Because a higher concentration leads to a shorter Debye length for the electrical double layer at the channel wall. 20. This propagator is the same as the massive Coulomb propagator with the mass equal to the inverse Debye length .
