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On the theoretical description of weakly charged surfaces

Wang, Rui and Wang, Zhen-Gang (2015) On the theoretical description of weakly charged surfaces. Journal of Chemical Physics, 142 (10). Art. No. 104705. ISSN 0021-9606. doi:10.1063/1.4914170.

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It is widely accepted that the Poisson-Boltzmann (PB) theory provides a valid description for charged surfaces in the so-called weak coupling limit. Here, we show that the image charge repulsion creates a depletion boundary layer that cannot be captured by a regular perturbation approach. The correct weak-coupling theory must include the self-energy of the ion due to the image charge interaction. The image force qualitatively alters the double layer structure and properties, and gives rise to many non-PB effects, such as nonmonotonic dependence of the surface energy on concentration and charge inversion. In the presence of dielectric discontinuity, there is no limiting condition for which the PB theory is valid.

Item Type:Article
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URLURL TypeDescription Paper
Wang, Zhen-Gang0000-0002-3361-6114
Additional Information:© 2015 AIP Publishing LLC. Received 28 November 2014; accepted 23 February 2015; published online 10 March 2015. Acknowledgment is made to the donors of the American Chemical Society Petroleum Research Fund for partial support of this research.
Funding AgencyGrant Number
American Chemical Society Petroleum Research FundUNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20150316-074943499
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Official Citation:On the theoretical description of weakly charged surfaces Wang, Rui and Wang, Zhen-Gang, The Journal of Chemical Physics, 142, 104705 (2015), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55762
Deposited By: Tony Diaz
Deposited On:16 Mar 2015 15:24
Last Modified:10 Nov 2021 20:49

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