Counterion adsorption theory of dilute polyelectrolyte solutions: Apparent molecular weight, second virial coefficient, and intermolecular structure factor
نویسندگان
چکیده
منابع مشابه
Counterion structure and dynamics in polyelectrolyte solutions
Investigations of the counterion distribution and correlations to polyelectrolytes have seen increased activity to understand intrinsically stiff and flexible polyelectrolytes in good solvents as functions of ionic strength, charge valence, and concentration. In particular, anomalous (resonant) small-angle X-ray scattering and small-angle neutron scattering have provided new insights on counter...
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The phenomenon of Manning-Oosawa counterion condensation is given an explicit statistical mechanical and qualitative basis via a dressed polyelectrolyte formalism in connection with the topology of the electrostatic free-energy surface and is derived explicitly in terms of the adsorption excess of ions about the polyion via the nonlinear Poisson-Boltzmann equation. The approach is closely analo...
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Membrane osmometry is used to measure osmotic pressures of dilute solutions containing quasi-spherical CdSe nanocrystals covered with polymer brushes in toluene in the range 31 to 45°C. Osmotic-pressure data, as a function of nanocrystal concentration, yield the molecular weight and the osmotic second virial coefficient of the nanocrystals; the latter is related to the potential of mean force b...
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Adsorption of biomolecules on surfaces is a perennial and general challenge relevant to many fields in biotechnology. A change of the Helmholtz free energy DeltaA takes place when a molecule becomes adsorbed out of a bulk solution. The purpose of our investigations is to explore routes for the calculation of DeltaA by molecular simulations. DeltaA can be obtained both by integration over the me...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2012
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.4736545