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Charging dynamics of aerosol OT inverse micelles

(2015) LANGMUIR. 31(40). p.10939-10945
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Abstract
Aerosol OT (AOT) is a commonly used surfactant and charging agent in nonpolar liquids. Properties such as the conductivity of AOT suspensions in nonpolar liquids and the behavior of charged AOT inverse micelles at interfaces have been studied recently, but still little is known about the generation dynamics of charged AOT inverse micelles. In this article, the generation dynamics of charged AOT inverse micelles in dodecane are investigated with transient current measurements. At low applied voltages, the generation rate is sufficiently fast to maintain the equilibrium concentration of charged inverse micelles, such that the current scales proportionally with the applied voltage. However, above a threshold voltage the current becomes limited by the generation of charged inverse micelles. Al2O3‑coated electrodes are used to achieve these high-voltage current measurements while reducing surface generation currents. The dependency of the resulting generation-limited currents with the micelle concentration and the liquid volume is compatible with a bulk disproportionation mechanism. The measured currents are analyzed using a model based on drift, generation, and recombination of charged inverse micelles and the corresponding generation and recombination rates of charged AOT inverse micelles have been determined.
Keywords
NONPOLAR-SOLVENTS, ELECTROPHORETIC DISPLAY, IN-OIL MICROEMULSIONS, REVERSED MICELLES, ELECTRONIC INK, WATER, LIQUIDS, POLYMERIZATION, SCATTERING, BEHAVIOR

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Chicago
Karvar, Masoumeh, Filip Strubbe, Filip Beunis, Roger Kemp, Nathan Smith, Mark Goulding, and Kristiaan Neyts. 2015. “Charging Dynamics of Aerosol OT Inverse Micelles.” Langmuir 31 (40): 10939–10945.
APA
Karvar, M., Strubbe, F., Beunis, F., Kemp, R., Smith, N., Goulding, M., & Neyts, K. (2015). Charging dynamics of aerosol OT inverse micelles. LANGMUIR, 31(40), 10939–10945.
Vancouver
1.
Karvar M, Strubbe F, Beunis F, Kemp R, Smith N, Goulding M, et al. Charging dynamics of aerosol OT inverse micelles. LANGMUIR. 2015;31(40):10939–45.
MLA
Karvar, Masoumeh, Filip Strubbe, Filip Beunis, et al. “Charging Dynamics of Aerosol OT Inverse Micelles.” LANGMUIR 31.40 (2015): 10939–10945. Print.
@article{6967458,
  abstract     = {Aerosol OT (AOT) is a commonly used surfactant and charging agent in nonpolar liquids. Properties such as the conductivity of AOT suspensions in nonpolar liquids and the behavior of charged AOT inverse micelles at interfaces have been studied recently, but still little is known about the generation dynamics of charged AOT inverse micelles. In this article, the generation dynamics of charged AOT inverse micelles in dodecane are investigated with transient current measurements. At low applied voltages, the generation rate is sufficiently fast to
maintain the equilibrium concentration of charged inverse micelles, such that the current scales proportionally with the applied voltage. However, above a threshold
voltage the current becomes limited by the generation of charged inverse micelles. Al2O3\unmatched{2011}coated electrodes are used to achieve these high-voltage current measurements while reducing surface generation currents. The dependency of the resulting generation-limited currents with the micelle concentration and the liquid volume is compatible with a bulk disproportionation mechanism. The measured currents are analyzed using a model based on drift, generation, and recombination of charged inverse micelles and the corresponding generation and recombination rates of charged AOT inverse micelles have been determined.},
  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       = {40},
  pages        = {10939--10945},
  title        = {Charging dynamics of aerosol OT inverse micelles},
  url          = {http://dx.doi.org/10.1021/acs.langmuir.5b01677},
  volume       = {31},
  year         = {2015},
}

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