Odijk-Skolnick-Fixman persistence length

Owning to the electrostatic repulsions along the chain, polyelectrolyte chains obtain an additional semi-flexibility beyond the neutral polymers, appearing as the additional persistence length l iec that has been called Odijk-Skolnick-Fixman persistence length. [Pg.62]

The effect of electrostatics on the persistence length of polyelectrolytes has been studied by a number of researchers. The first theoretical model was developed independently by Odijk [95] and by Skolnick and Fixman [96]. They expressed the total persistence length, /p, as the sum of the natural persistence length, Iq, and the electrostatic persistence length, /p, i.e., /p = /o+fe- For long chains, they obtained the following formula ... [Pg.21]

If the chain is uniformly charged, consideration (Odijk 1977, Skolnick and Fixman 1977) of electrostatic repulsion within the Debye-Huckel approximation leads to an additional term for Ub/ksT, which is proportional to 0 /2L. Therefore, the coefficient of the additional contribution can be identified as a persistence length,... [Pg.89]

Odijk and Skolnick and Fixman (OSF) showed that the persistence length of a wormlike polyelectrolyte in aqueous salt is the sum of two contributions, that is,... [Pg.28]

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