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Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

461
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
461

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Streaming Potential with Ideally Polarizable Electron-Conducting Substrates.

Andriy Yaroshchuk1,2, Emiliy Zholkovskiy3

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Streaming potential in electron-conducting materials is a nonlinear function of pressure and position, unlike nonconducting materials. This finding is crucial for understanding transport phenomena in porous films.

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Area of Science:

  • Electrochemistry
  • Physical Chemistry
  • Materials Science

Background:

  • Streaming potential in nonconducting capillaries is a linear function of applied pressure.
  • Understanding electrokinetic phenomena in conducting materials is essential for various applications.

Purpose of the Study:

  • To investigate streaming potential in ideally polarizable electron-conducting substrates for the first time.
  • To determine the relationship between streaming potential, applied pressure, and position in conducting materials.

Main Methods:

  • Theoretical modeling of streaming potential in electron-conducting substrates.
  • Comparison of model predictions with existing experimental data for porous films.

Main Results:

  • Streaming potential in electron-conducting substrates exhibits a nonlinear dependence on applied pressure and position.
  • This nonlinearity is distinct from the linear behavior observed in nonconducting materials.

Conclusions:

  • The study reveals a novel nonlinear electrokinetic behavior in electron-conducting materials.
  • Experimental relevance is highlighted for thin porous electron-conducting films, particularly under solvent evaporation conditions.