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28 March 2024 |
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Article overview
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Charge fluctuations in nano-scale capacitors | David T. Limmer
; Céline Merlet
; Mathieu Salanne
; David Chandler
; Paul A. Madden
; René van Roij
; Benjamin Rotenberg
; | Date: |
28 Jun 2013 | Abstract: | The fluctuations of the charge on an electrode contain information on the
microscopic correlations within the adjacent fluid and their effect on the
electronic properties of the interface. We investigate these fluctuations using
molecular dynamics simulations in a constant-potential ensemble with histogram
reweighting techniques. This approach offers an efficient and accurate route to
the differential capacitance and is broadly applicable. We demonstrate these
methods with three different capacitors: pure water between platinum
electrodes, and a pure as well as a solvent-based organic electrolyte each
between graphite electrodes. The total charge distributions with the pure
solvent and solvent-based electrolytes are remarkably Gaussian, while in the
pure ionic liquid the total charge distribution displays distinct non-Gaussian
features, suggesting significant potential-driven changes in the organization
of the interfacial fluid. | Source: | arXiv, 1306.6903 | Services: | Forum | Review | PDF | Favorites |
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