Volume 75, Number 3, August 2006
|Page(s)||427 - 433|
|Section||Atomic and molecular physics|
|Published online||28 June 2006|
Strongly charged polymer brushes
Department of Chemical Engineering, Columbia University New York, NY10027, USA
2 Department of Physics, Columbia University - New York, NY10027, USA
Accepted: 6 June 2006
We have established phase diagrams for strongly charged polymer brushes as a function of salt concentration ns, chain grafting density and polymer backbone charge density. We show these are qualitatively different to the previously calculated weakly charged phase diagrams due to electrostatic stiffening and counterion condensation effects, the hallmarks of highly charged polymers such as DNA. Saturated phases arise where chains are locally or globally fully stretched. We show the salt dependence of brush height H depends on the form of the persistence length lp. In good agreement with experiment, we find at higher salt concentrations if a linear relation between lp and Debye length is assumed.
PACS: 36.20.Ey – Conformation (statistics and dynamics) / 61.20.Qg – Structure of associated liquids: electrolytes, molten salts, etc / 61.25.Hq – Macromolecular and polymer solutions; polymer melts, swelling
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.