Nonmonotonic electric conductivity by alkyl-chain variation of an ionic additive in percolated nonionic w/o-microemulsions

Article Abstract:

A nonmonotonic electrical conductivity as a function of chain length was observed at the critical percolation temperature of the system during the investigations of the sparsely distributed ionic surfactants with varying alkyl chains in a nonionic w/o-microemulsion. It is seen that nonmonotonic electrical conductivity plot against n-alkyl chain length could be caused due to a model that assumes a molecular weight dependent dissociation and oil solubility of a sparsely added ionic surfactant to an otherwise nonionic w/o microemulsion in the percolated state.

Charge transfer, Alkyl groups

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Scaling relation between electrical conductivity percolation and water diffusion coefficient in sodium bis(2-ethylhexyl) sulfosuccinate-based microemulsion

Article Abstract:

The conductivity percolation mechanism of a water-in-oil (W/O) microemulsion composed of sodium bis(2-ethylhexyl) sulfosuccinate (AOT), D2O, and decane is studied using impedance spectroscopy and the pulsed-gradient spin-echo (PGSE) NMR technique. Results indicate that a common mechanism governs both conductivity percolation and the diffusion of water molecules between droplets in AOT-based W/O microemulsion.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Sodium, Sodium & Sodium Compounds, Usage, Sodium (Chemical element), Thermal properties, Impedance spectroscopy

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Conjugated polymetallorotaxanes: in-situ ESR and conductivity investigations of metal-backbone interactions

Article Abstract:

The electrochemical studies of polymetallorotaxanes films of a general formula poly[1,3,M(super n+)] where M(super n+) is copper(I), cobalt(II), zinc(II) or lithium(I) are reported for both metalated and dematalated poly[1,3,-] forms. The comparison of the result clearly indicates that metal-complexed rings constitute barriers which lower charge-carrier mobility.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Thin Film Materials, Polymers, Thin films, Dielectric films

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