Using ab initio molecular dynamics simulations, we have studied the growth mechanisms of boron-nitride (BN) nanotubes. In the experimental conditions of temperature, the behavior of single-wall BN nanotubes strongly depends on their helicity. Open-ended “zigzag” tubes close into an amorphouslike tip, preventing further growth. In the “armchair” case, the formation of squares traps the tip into a flat cap able to revert to a growing hexagonal network by incorporating incoming atoms. These findings are related to the greater stability of B-N bonds as compared to B-B or N-N bonds.
|Original language||English (US)|
|Number of pages||4|
|Journal||Physical review letters|
|State||Published - Feb 23 1998|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)