Journal
EPL
Volume 120, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1209/0295-5075/120/26001
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Funding
- Israel Science Foundation (ISF) [438/12]
- US-Israel Binational Science Foundation (BSF) [2012/060]
- ISF-NSFC (China) [885/15]
- Mortimer and Raymond Sackler Institute of Advanced Studies at Tel Aviv University
- Blavatnik postdoctoral fellowship programme
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We generalize the concept of charge regulation of ionic solutions, and apply it to complex fluids with mobile macro-ions having internal non-electrostatic degrees of freedom. The suggested framework provides a convenient tool for investigating systems where mobile macroions can self-regulate their charge (e.g., proteins). We show that even within a simplified charge-regulation model, the charge dissociation equilibrium results in different and notable properties. Consequences of the charge regulation include a positional dependence of the effective charge of the macro-ions, a non-monotonic dependence of the effective Debye screening length on the concentration of the monovalent salt, a modification of the electric double-layer structure, and buffering by the macro-ions of the background electrolyte. Copyright (C) EPLA, 2018
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