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Characterizing generated charged inverse micelles with transient current measurements

Filip Strubbe (UGent) , Manoj Prasad (UGent) and Filip Beunis (UGent)
(2015) JOURNAL OF PHYSICAL CHEMISTRY B. 119(5). p.1957-1965
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Abstract
We investigate the generation of charged inverse micelles in nonpolar surfactant solutions relevant for applications such as electronic ink displays and liquid toners. When a voltage is applied across a thin layer of a nonpolar surfactant solution between planar electrodes, the generation of charged inverse micelles leads to a generation current. From current measurements it appears that such charged inverse micelles generated in the presence of an electric field behave differently compared to those present in equilibrium in the absence of a field. To examine the origin of this difference, transient current measurements in which the applied voltage is suddenly increased are used to measure the mobility and the amount of generated charged inverse micelles. The mobility and the corresponding hydrodynamic size are found to be similar to those of charged inverse micelles present in equilibrium, which indicates that other properties determine their different behavior. The amplitude and shape of the transient currents measured as a function of the surfactant concentration confirm that the charged inverse micelles are generated by bulk disproportionation. A theoretical model based on bulk disproportionation with simulations and analytical approximations is developed to analyze the experimental transient currents.
Keywords
COLLOIDAL PARTICLES, NONPOLAR LIQUIDS, SURFACTANTS, MEDIA, TRANSPORT, CONDUCTIVITY, STABILITY

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Citation

Please use this url to cite or link to this publication:

Chicago
Strubbe, Filip, Manoj Prasad, and Filip Beunis. 2015. “Characterizing Generated Charged Inverse Micelles with Transient Current Measurements.” Journal of Physical Chemistry B 119 (5): 1957–1965.
APA
Strubbe, F., Prasad, M., & Beunis, F. (2015). Characterizing generated charged inverse micelles with transient current measurements. JOURNAL OF PHYSICAL CHEMISTRY B, 119(5), 1957–1965.
Vancouver
1.
Strubbe F, Prasad M, Beunis F. Characterizing generated charged inverse micelles with transient current measurements. JOURNAL OF PHYSICAL CHEMISTRY B. 2015;119(5):1957–65.
MLA
Strubbe, Filip, Manoj Prasad, and Filip Beunis. “Characterizing Generated Charged Inverse Micelles with Transient Current Measurements.” JOURNAL OF PHYSICAL CHEMISTRY B 119.5 (2015): 1957–1965. Print.
@article{5893953,
  abstract     = {We investigate the generation of charged inverse micelles in nonpolar surfactant solutions relevant for applications such as electronic ink displays and liquid toners. When a voltage is applied across a thin layer of a nonpolar surfactant solution between planar electrodes, the generation of charged inverse micelles leads to a generation current. From current measurements it appears that such charged inverse micelles generated in the presence of an electric field behave differently compared to those present in equilibrium in the absence of a field. To examine the origin of this difference, transient current measurements in which the applied voltage is suddenly increased are used to measure the mobility and the amount of generated charged inverse micelles. The mobility and the corresponding hydrodynamic size are found to be similar to those of charged inverse micelles present in equilibrium, which indicates that other properties determine their different behavior. The amplitude and shape of the transient currents measured as a function of the surfactant concentration confirm that the charged inverse micelles are generated by bulk disproportionation. A theoretical model based on bulk disproportionation with simulations and analytical approximations is developed to analyze the experimental transient currents.},
  author       = {Strubbe, Filip and Prasad, Manoj and Beunis, Filip},
  issn         = {1520-6106},
  journal      = {JOURNAL OF PHYSICAL CHEMISTRY B},
  language     = {eng},
  number       = {5},
  pages        = {1957--1965},
  title        = {Characterizing generated charged inverse micelles with transient current measurements},
  url          = {http://dx.doi.org/10.1021/jp511378k},
  volume       = {119},
  year         = {2015},
}

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