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The Electrical Capacitance of Small Systems

✍ Scribed by José A. Fornés

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
98 KB
Volume
226
Category
Article
ISSN
0021-9797

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✦ Synopsis

The electrical capacitance of several small systems is determined by using results given by the fluctuation-dissipation theorem in the classical limit. Estimating the electrical capacitance is important because it is the link to knowledge of the fluctuation of several physical quantities, voltage and field fluctuations, dipole moment, pH, and charge, and also to knowledge of the polarizability and the dielectric dispersion of colloidal and polyelectrolyte systems. For small systems appearing in nature ∼(10-1000) Å the electric capacitance varies in the range ∼(10-1000) × 10 -18 F with the corresponding field and dipole moment fluctuations in the order of units of (10 4 -10 6 ) V/m and (10 2 -10 4 ) D, respectively.

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