Density functional studies of oxygen-terminations versus hydrogen-terminations in carbon and silicon nanotubes

作者：Mirzaei Mahmoud^*; Yousefi Mohammad; Meskinfam Masoumeh

来源：Solid State Sciences, 2012, 14(7): 874-879.

DOI：10.1016/j.solidstatesciences.2012.04.026

• Carbon nanotube
• Silicon nanotube
• Oxygen termination
• Hydrogen termination
• Density functional theory

We performed density functional theory (DFT) calculations to investigate the properties of hydrogen-terminated and oxygen terminated models of representative structures of carbon and silicon nanotubes. Different models based on terminating atoms were constructed for each nanotube; model 1: two-end H-terminated, model 2: one-end O-terminated and the other end H-terminated, and model 3: two-end O-terminated. The results of obtained parameters including energy gaps, binding energies, dipole moments, bond lengths, and chemical shifts for the optimized models of the investigated nanotubes indicated that the atomic level properties of nanotubes changed more in the O-terminated models than the H-terminated model. Moreover, the O-terminations could change the magnitude of energy gaps and dipole moments. And finally, for investigating the properties of nanotubes, H-terminations models of nanotubes could be more preferred than other types of terminations.

• 出版日期2012-7