Confined nanorods: jamming due to helical buckling

We investigate a longitudinally loaded elastic nanorod inside a cylindrical channel and show within the context of classical elasticity theory that the Euler buckling instability leads to a helical postbuckling form of the rod within the channel. The local pitch of the confined helix changes along the channel and so does the longitudinal force transmitted along the rod, diminishing away from the loaded end. This creates a possibility of jamming of the nanorod within the channel.Comment: 8 pages, 8 figure

Computer simulation of liquid crystals

This chapter describes some of the simulation methods that are used to investigate the properties of liquid crystals. Orientational elasticity. one of the characteristic features of liquid crystals, may be studied through equilibrium wave-vector-dependent fluctuations, or by directly deforming the director field via, imposed boundary conditions. This leads to investigations of surface anchoring coefficients and the helical twisting power of chiral dopants. Interfacial properties such as surface tension may be studied using standard methods, but the orientational ordering of liquid crystals leads to a richer behaviour than is seen for simple fluids. Finally, simulations of macroparticles suspended in liquid crystalline solvents May provide information about the defect structure on the molecular scale, and help to make contact with larger-scale modelling methods and with experiment