title: Irreversible pressure-induced transformation of boron nitride nanotubes.
abstract: We have used Raman spectroscopy to study the behavior of multi-walled boron nitride nanotubes and hexagonal boron nitride crystals under high pressure. While boron nitride nanotubes show an irreversible transformation at about 12 GPa, hexagonal boron nitride exhibits a reversible phase transition at 13 GPa. We also present molecular dynamics simulations which suggest that the irreversibility of the pressure-induced transformation in boron nitride nanotubes is due to the polar nature of the bonds between boron and nitrogen.
authors.affiliation: Department of Physics, Indian Institute of Science, Bangalore 560012, India.
authors.forename: Surajit
authors.initials: S
authors.lastname: Saha
authors.forename: Vikram
authors.initials: V
authors.lastname: Gadagkar
authors.forename: Prabal K
authors.initials: PK
authors.lastname: Maiti
authors.forename: D V S
authors.initials: DV
authors.lastname: Muthu
authors.forename: D
authors.initials: D
authors.lastname: Golberg
authors.forename: C
authors.initials: C
authors.lastname: Tang
authors.forename: C
authors.initials: C
authors.lastname: Zhi
authors.forename: Y
authors.initials: Y
authors.lastname: Bando
authors.forename: A K
authors.initials: AK
authors.lastname: Sood
mesh_terms: D001896:Boron Compounds / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011312:Pressure; D013499:Surface Properties
chemical_list: D001896:Boron Compounds; D046911:Macromolecular Substances; C017282:boron nitride