NSE study of the collective dynamics of counterion presenting in solutions of polyelectrolyte with different conformation
Polyelectrolytes possess unique properties because of the presence of charges. Numerous commercial applications have been developed using these materials, mostly related to their capabilities of modifying flow and stability properties of aqueous solutions and gels. Generally, the small angle neutron scattering (SANS) intensity I(Q) obtained from polyelectrolyte solutions are characterized by the presence of an interaction peak. In addition, an upturn is always present in the low Q region. This low Q upturn cannot be predicted by any existing liquid theories or computer simulations. But they are possibly related to the stability and structure formation of a variety of ionic macromolecules in aqueous media. Understanding the origin of this phenomenon is critical in the development of charged polymers with desired functionality. The focus is placed on elucidating the correlation between the collective motions of counterion and the conformation of polyelectrolyte, which has been shown to greatly influence the large-scale density fluctuation of polyelectrolyte solutions.
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CHEN Wei Ren; BERTRAND Christopher; DO Changwoo; EGAMI Takeshi; FALUS Peter; FRATINI Emiliano; William A. Hamilton; Kunlun Hong; LIU Yun; PORCAR Lionel and SANCHEZ DIAZ Luis. (2013). NSE study of the collective dynamics of counterion presenting in solutions of polyelectrolyte with different conformation. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1585
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