For the first time, patterned growth of boron nitride nanotubes is achieved by catalytic chemical vapor deposition (CCVD) at 1200 C using MgO, Ni, or Fe as the catalysts, and an Al2O3 diffusion barrier as underlayer. The as-grown BNNTs are clean, vertically aligned, and have high crystallinity. Near band-edge absorption ∼6.0 eV is detected, without significant sub-band absorption centers. Elect...

The use of composite materials increases due to its exceptionally better mechanical properties compared to their individual constitutes. The use of Nano materials as one of the constitutes of composite materials adds the advantages specially of high dynamic behavior due to their dimensions of nano scale. The carbon nanotubes (CNTs) and boron nitride nanotubes (BNNTs) possess excellent mechanica...

A series of boron nitride nanotubes (BNNTs)/ carbide (B4C) composite ceramics were prepared using spark plasma sintering (SPS) technology, which uses B4C powders as the matrix and BNNTs toughening phase. X-ray diffraction (XRD) scanning electron microscope (SEM) then used to characterize ceramic samples. The effects temperature, content, particle size on microstructure mechanical properties inv...

The adsorption of H2O, NH3 and HCOOH as polar probe molecules and C6H6 and CH4 as non-polar ones on a series of zig-zag (n,0) single-walled boron nitride nanotubes (BNNTs) and on a boron-nitride mono-layer (BNML) has been studied by means of B3LYP-D* periodic calculations. Computed electrostatic potential maps for the pristine BN nanomaterials indicate that the smaller the radius, the larger th...

Methane adsorption onto single-wall boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) was studied using the density functional theory within the generalized gradient approximation. The structural optimization of several bonding configurations for a CH4 molecule approaching the outer surface of the (8,0) BNNT and (8,0) CNT shows that the CH4 molecule is preferentially adsorbed onto the...

Enhancement of the production yield of boron nitride nanotubes (BNNTs) with high purity was achieved using an amorphous boron-based precursor and a nozzle-type reactor. Use of a mixture of amorphous boron and Fe decreases the milling time for the preparation of the precursor for BNNTs synthesis, as well as the Fe impurity contained in the B/Fe interdiffused precursor nanoparticles by using a si...

Hyphenated electrospinning electrospraying is a versatile method for synthesizing polymeric functional materials with fascinating and tuneable characteristics. In this paper, previously unreported clusters of boron nitride nanotubes (BNNTs) their hybrid nanofibers ɛ-polycaprolactone (PCL) were fabricated successfully. For instance, biocompatible nano fibrous mat may have potent to encapsulate c...

Nanotubes present one of the most promising opportunities in nanotechnology with a plethora of applications in nanoelectronics, mechanical engineering, as well as in biomedical technology. Due to their structure and some physical properties, boron nitride (BN) nanotubes (BNNTs) possess several advantages over carbon nanotubes (CNTs), and they are now commercially produced and used on a large sc...

Boron nitride nanotubes (BNNTs) have many application areas thanks to their superior properties such as thermal and electrical insulation, resistance oxidation, high hydrophobicity, hydrogen storage capacity, well biocompatible properties. Therefore, new synthesis methods are being searched for BNNT with increasing interest in recent years. In this study, purity yield BNNTs were synthesized usi...

Since boron nitride nanotubes (BNNTs) were first manufactured, they have gained considerable attention for their wide-scale application as reinforcing composites, piezoelectric materials, electrical insulating thermal conductors, and neutron shielding materials because of excellent mechanical, electrical, thermal, absorption properties. Despite the remarkable properties broad scope BNNTs, use h...