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Investigation of various types of inverse micelles in nonpolar liquids using transient current measurements

(2014) LANGMUIR. 30(41). p.12138-12143
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Abstract
Transient current measurements are used to characterize a wide variety of charge carriers in nonpolar liquids. The transient current method allows us to obtain both the concentration and mobility of charge carriers and therefore also the hydrodynamic radius using Stokes' law. In this article, five different surfactants in dodecane are investigated: OLOA11K, Solsperse13940, Span80, Span85, and AOT. We show that different types of currents are observed depending on the size of the inverse micelles. For large inverse micelles such as for OLOA11K, Solsperse13940, and Span80, the measurement of the transient current is straightforward because of the low steady-state current level. However, for small inverse micelles such as AOT and Span85, the current from the generation of charges is much larger such that high voltages, a small distance between the electrodes, and dielectric coatings on the electrodes are required to measure the signal related to the initially present charged inverse micelles. The estimated hydrodynamic radii of AOT and Span85, the two smallest inverse micelles, are in good agreement with the values reported in the literature. The comparison of the transient currents with simulations indicates that the dynamics of the charge transport are well-understood.
Keywords
REVERSE MICELLES, ELECTRONIC INK, COLLOIDAL PARTICLES, ELECTROPHORETIC DISPLAYS, DYNAMIC LIGHT-SCATTERING, WATER, SYSTEMS, MEDIA, SIMULATIONS, CHARGES

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Chicago
Karvar, Masoumeh, Filip Strubbe, Filip Beunis, Roger Kemp, Nathan Smith, Mark Goulding, and Kristiaan Neyts. 2014. “Investigation of Various Types of Inverse Micelles in Nonpolar Liquids Using Transient Current Measurements.” Langmuir 30 (41): 12138–12143.
APA
Karvar, M., Strubbe, F., Beunis, F., Kemp, R., Smith, N., Goulding, M., & Neyts, K. (2014). Investigation of various types of inverse micelles in nonpolar liquids using transient current measurements. LANGMUIR, 30(41), 12138–12143.
Vancouver
1.
Karvar M, Strubbe F, Beunis F, Kemp R, Smith N, Goulding M, et al. Investigation of various types of inverse micelles in nonpolar liquids using transient current measurements. LANGMUIR. American Chemical Society; 2014;30(41):12138–43.
MLA
Karvar, Masoumeh, Filip Strubbe, Filip Beunis, et al. “Investigation of Various Types of Inverse Micelles in Nonpolar Liquids Using Transient Current Measurements.” LANGMUIR 30.41 (2014): 12138–12143. Print.
@article{7278697,
  abstract     = {Transient current measurements are used to characterize a wide variety of charge carriers in nonpolar liquids. The transient current method allows us to obtain both the concentration and mobility of charge carriers and therefore also the hydrodynamic radius using Stokes' law. In this article, five different surfactants in dodecane are investigated: OLOA11K, Solsperse13940, Span80, Span85, and AOT. We show that different types of currents are observed depending on the size of the inverse micelles. For large inverse micelles such as for OLOA11K, Solsperse13940, and Span80, the measurement of the transient current is straightforward because of the low steady-state current level. However, for small inverse micelles such as AOT and Span85, the current from the generation of charges is much larger such that high voltages, a small distance between the electrodes, and dielectric coatings on the electrodes are required to measure the signal related to the initially present charged inverse micelles. The estimated hydrodynamic radii of AOT and Span85, the two smallest inverse micelles, are in good agreement with the values reported in the literature. The comparison of the transient currents with simulations indicates that the dynamics of the charge transport are well-understood.},
  author       = {Karvar, Masoumeh and Strubbe, Filip and Beunis, Filip and Kemp, Roger and Smith, Nathan and Goulding, Mark and Neyts, Kristiaan},
  issn         = {0743-7463},
  journal      = {LANGMUIR},
  language     = {eng},
  number       = {41},
  pages        = {12138--12143},
  publisher    = {American Chemical Society},
  title        = {Investigation of various types of inverse micelles in nonpolar liquids using transient current measurements},
  url          = {http://dx.doi.org/10.1021/la502287m},
  volume       = {30},
  year         = {2014},
}

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