Moiré patterns are additional, long-range periodicities in twisted crystalline bilayers. They known to fundamentally change the electronic states of layers, but similar effects on their mechanical and vibrational properties have not been discussed so far. Here we show that moiré potential shifts radial breathing mode double-walled carbon nanotubes (DWCNTs). The frequency is expected be proporti...

A new method of theoretical modelling of polyhedral single-walled nanotubes based on the consolidation of walls in the rolled-up multi-walled nanotubes is proposed. Molecular mechanics and ab initio quantum mechanics methods are applied to investigate the merging of walls in nanotubes constructed from the different phases of titania. The combination of two methods allows us to simulate the stru...