Charged rod model

Fig. 3. Computation of chain potential y/ and concentration C of charged rod model. Percentage points refer to fraction of bound ions, assigned to the Stern Layer region at that distance,...

The results can now be discussed qualitatively using the charged rod model for polyelectrolytes and particularly the ion condensation concept. Several theoreticians [6, 7, 8, 9] have reached the conclusion that a charged rod in solution becomes instable if the charge density increases above a certain critical value. If one tries to increase the charge density above this value compensation occurs by condensation of counter-ions. 

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