Phonon dispersion and quantization tuning of strained carbon nanotubes for flexible electronics

Articles you may be interested in Strain on field effect transistors with single–walled–carbon nanotube network on flexible substrate Electrical and lattice vibrational behaviors of graphene devices on flexible substrate under small mechanical strain Appl. Accurate density functional calculations for the phonon dispersion relations of carbon nanotubes AIP Conf. Graphene and carbon nanotubes are materials with large potentials for applications in flexible electronics. Such devices require a high level of sustainable strain and an understanding of the materials electrical properties under strain. Using supercell theory in conjunction with a comprehensive molecular mechanics model, the full band phonon dispersion of carbon nanotubes under uniaxial strain is studied. The results suggest an overall phonon softening and open up the possibility of phonon quantization tuning with uniaxial strain. The change in phonon quantization and the resulting increase in electron-phonon and phonon-phonon scattering rates offer further explanation and theoretical basis to the experimental observation of electrical properties degradation for carbon nanotubes under uniaxial strain. V C 2014 AIP Publishing LLC.