Dressed polyions, counterion condensation, and adsorption excess in polyelectrolyte solutions.
نویسندگان
چکیده
منابع مشابه
Dressed polyions, counterion condensation, and adsorption excess in polyelectrolyte solutions.
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...
متن کاملCounterion 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...
متن کاملPolyelectrolytes, polyelectrolyte complexes, counterion condensation and ligand binding
Die elektrostatische Wechselwirkung dominiert die Adsorption von Polyelektrolyten an Oberflächen, die Bildung von Komplexen und die Bindung von Liganden an Makromoleküle. Die effektive Ladung von Polyelektrolyten wird durch die nominelle Ladungsdichte und die Gegenionenkondensation, die vom umgebenden Medium abhängt, bestimmt. Elektrophorese-NMR zusammen mit DiffusionsNMR erlaubt es, die effekt...
متن کاملCharge fluctuations and counterion condensation.
We predict a condensation phenomenon in an overall neutral system, consisting of a single charged plate and its oppositely charged counterions. Based on the "two-fluid" model, in which the counterions are divided into a "free" and a "condensed" fraction, we argue that for high surface charge, fluctuations can lead to a phase transition in which a large fraction of counterions is condensed. Furt...
متن کاملManning-Oosawa counterion condensation.
Counterion condensation is a basic feature of 2D electrostatics exhibited by highly charged rodlike polymers such as DNA. In the framework of the Poisson Boltzmann equation with salt, we show that such a polymer of radius a attracts a condensate of thickness RM=A(axi)1/2 where xi is the Debye length and A depends weakly on the polymer charge density q0. To leading order in 1/ln(xi/a), we derive...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1996
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.93.9.4342