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Showing 1–5 of 5 results
Advanced filters: Author: Murugappan Muthukumar Clear advanced filters

  • Response of polar and neutral monomers in macromolecules to an electric field in their crowded aqueous solutions remains as an unchartered area of research. Here the authors investigate single-molecule electrophoresis of a couple of neutral polyzwitterions which have charge-neutrality with strong acidic group and permanent positive charge within their repeat units, and show that their charge-neutrality is broken which is attributed to gradients in the local dielectric constant.

    • Yeseul Lee
    • Murugappan Muthukumar
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-14

  • The weak interactions which drive the assembly of gels comprised of dynamic bond leads to a constant change in the structure and dynamics. Here the authors report a universal law of hierarchical gel dynamics arising from association-dissociation of physical crosslinks, as discerned from dynamic light scattering on diverse sets of complex gels.

    • Yi Hui Zhao
    • Yu Sen Jie
    • Di Jia
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • A study of the dynamics of polymer translocation through synthetic nanopores provides a direct observation of tension propagation—a non-equilibrium description of the process of unfolding that a polymer undergoes during translocation.

    • Kaikai Chen
    • Ining Jou
    • Nicholas A. W. Bell
    Research
    Nature Physics
    Volume: 17, P: 1043-1049

  • Coacervation is widely studied as potential drug delivery platform, but formation of coacervates at lower pH ranges, such as found in the gastrointestinal tract, remains challenging. Here, using theory and experimental methods, the authors demonstrate the formation of a polyzwitterionic complex, formed by coacervation of a polyzwitterion and a polyelectrolyte, exhibiting orthogonal phase behavior under physiological low pH conditions.

    • Khatcher O. Margossian
    • Marcel U. Brown
    • Murugappan Muthukumar
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-11

  • Diffusion of molecules in crowded environment is important for various living systems, but the dynamics of charged molecules in charged matrices remains still unexplored. Here the authors report a dynamics of DNA and polyelectrolytes in a charged hydrogel where the guest molecules do not diffuse but experience topologically frustrated dynamics.

    • Di Jia
    • Murugappan Muthukumar
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-12