139 citations · 414 across the 12 of their papers we have counts for
10 papers · 1 filter
Active dynamics of charged macromolecules
Tapas Singha, Siao-Fong Li, Murugappan Muthukumar
We study the role of active coupling on the transport properties of homogeneously charged macromolecules in an infinitely dilute solution. An enzyme becomes actively bound to a seg…
Role of Non-Equilibrium Conformations on Driven Polymer Translocation
Harshwardhan H. Katkar, Murugappan Muthukumar
One of the major theoretical methods in understanding polymer translocation through a nanopore is the Fokker-Planck formalism based on the assumption of quasi-equilibrium of polyme…
Enhanced phase segregation induced by dipolar interactions in polymer blends
Rajeev Kumar, Bobby G. Sumpter, M. Muthukumar
We present a generalized theory for studying phase separation in blends of polymers containing dipoles on their backbone. The theory is used to construct co-existence curves and to…
Origin of translocation barriers for polyelectrolyte chains
Rajeev Kumar, M. Muthukumar
For single-file translocations of a charged macromolecule through a narrow pore, the crucial step of arrival of an end at the pore suffers from free energy barriers, arising from c…
Counterion adsorption on flexible polyelectrolytes: comparison of theories
Rajeev Kumar, Arindam Kundagrami, M. Muthukumar
Counterion adsorption on a flexible polyelectrolyte chain in a spherical cavity is considered by taking a "permuted" charge distribution on the chain so that the "adsorbed" counter…
Confinement free energy of flexible polyelectrolytes in spherical cavities
Rajeev Kumar, M. Muthukumar
A weakly charged flexible polyelectrolyte chain in a neutral spherical cavity is analyzed using self-consistent field theory (SCFT) within an explicit solvent model. Assuming the r…