Vibrational properties of boron nitride nanotubes: Effects of finite length and bundling

Doping of cBN with silicon and beryllium is observed in both cases, and the degree of doping increases substantially in the case of crystallization of cubic boron nitride from

aeruginosa de 48 h formés sur des membranes (A) et de 72 h formés dans un système en flux continu (drip flow reactor) (B) et exposés ou non à de la ciprofloxacine ou tobramycine

In Fig. 3 we compare the ab initio phonon dispersion relation of a 共6,6兲 BN nanotube with the corresponding zone- folding dispersion relation. The zone-folding method works equally

Among several deviations from ab initio calculations of the lattice dynamics both for a monolayer [ 10 , 11 ] and for bulk h-BN [ 12 , 13 ], the EELS data show a degeneracy at the

2 we present the spectra of bulk hexagonal BN, of the single sheet of hexagonal BN, and of different BN nanotubes with diameters ranging from 2.8 A ˚ (for the purely hypothetical

The binding energy of this peak increases strongly as the dimensionality is reduced from the 3-D bulk over the 2-D sheet to the 1-D tubes.. At the same time the quasi-particle band

Although the corresponding total shift of the Fermi level from a comparison of both spectra alone can be com- plicated by additional effects such as different excitonic ef- fects or