75 citations · 179 across the 7 of their papers we have counts for
4 papers · 1 filter
Defects in Chiral Columnar Phases: Tilt Grain Boundaries and Iterated Moire Maps
Randall D. Kamien, David R. Nelson
Biomolecules are often very long with a definite chirality. DNA, xanthan and poly-gamma-benzyl-glutamate (PBLG) can all form columnar crystalline phases. The chirality, however, co…
Iterated Moire Maps and Braiding of Chiral Polymer Crystals
Randall D. Kamien, David R. Nelson
In the hexagonal columnar phase of chiral polymers a bias towards cholesteric twist competes with braiding along an average direction. When the chirality is strong, screw dislocati…
Rotational Invariance and the Theory of Directed Polymer Nematics
Randall D. Kamien, Pierre Le Doussal, David R. Nelson
The consequences of rotational invariance in a recent theory of fluctuations in dilute polymer nematics are explored. A correct rotationally invariant free energy insures that anom…
Theory of Directed Polymers
R. D. Kamien, P. Le Doussal, D. R. Nelson
We develop a theory of polymers in a nematic solvent by exploiting an analogy with two-dimensional quantum bosons at zero temperature. We argue that the theory should also describe…