Mesoscale structures at complex fluid–fluid interfaces: a novel lattice Boltzmann/molecular dynamics coupling

Dynamics of swimming bacteria at complex interfaces

Flagellated bacteria exploiting helical propulsion are known to swim along circular trajectories near surfaces. Fluid dynamics predicts this circular motion to be clockwise (CW) above a rigid surface (when viewed from inside the fluid) and counterclockwise (CCW) below a free surface. Recent experimental investigations showed that complex physicochemical processes at the nearby surface could lea...

Exchange Coupling at Cobalt/ Nickel Oxide Interfaces

Perpendicular coupling at Fe–FeF2 interfaces

We have studied the exchange anisotropy of ferromagnetic Fe films grown on antiferromagnetic FeF2 single crystals. The behavior of the hysteresis loops of the Fe above and below the Néel temperature TN of FeF2 indicates a 90° rotation of the ferromagnetic easy axis due to the antiferromagnetic ordering. By examining the Fe hysteresis loops together with the FeF2 susceptibility behavior we infer...

A New Approach to Buckling Analysis of Lattice Composite Structures

Buckling strength of composite latticed cylindrical shells is one of the important parameters for studying the failure of these structures. In this paper, new governing differential equations are derived for latticed cylindrical shells and their critical buckling axial loads. The nested structure under compressive axial buckling load was analyzed. Finite Element Method (FEM) was applied to mode...

Novel fluctuations at constrained interfaces

In the study of condensed matter systems, a paradigm which is very generally invoked is that of a ground state and its low energy excitations. A classical solid, for example, is a periodic crystal with low energy, long wavelength phonon fluctuations. Often these low energy excitations appear due to the complete or partial breaking of a spatial symmetry e.g. rotational or translational symmetry....