Functionalization is an important way to breed new properties and applications for a material. This review presents an overview of the progresses in functionalized hexagonal boron nitride (h-BN) nanomaterials. It begins with an introduction of h-BN structural features, physical and chemical properties, followed by an emphasis on the developments of BN functionalization strategies and its emerging properties/applications, and ends with the research perspectives. Different functionalization methods, including physical and chemical routes, are comprehensively described toward fabrication of various BN derivatives, hetero- and porous structures, etc. Novel properties of functionalized BN materials, such as high water solubility, excellent biocompatibility, tunable surface affinities, good processibility, adjustable band gaps, etc., have guaranteed wide applications in biomedical, electronic, composite, environmental and "green" energy-related fields.

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Functionalized hexagonal boron nitride nanomaterials: emerging properties and applications.

Shock compression of solids

A review, with 112 references, is given of the different ways to prepare cubic boron nitride (BN). The different crystal forms as well as the phase diagram of BN are described. The physical and chemical properties and the correlated industrial or potential applications are shown.

Cubic boron nitride: synthesis, physicochemical properties and applications

We have carried out first-principles total energy calculations to investigate electronic and elastic properties of both zinc-blende and wurtzite BN, AlN, and GaN. We have calculated lattice parameters, elastic constants, deformation potential constants, phonon frequencies at Γ point, Born effective charges, and piezoelectric constants. Lattice parameters are fully relaxed by using the first-principles molecular dynamics method with variable cell shape. The internal strain in a strained crystal is also relaxed by the first-principles molecular dynamics method. The internal strain influences the elastic constants, the deformation potential constants, and the piezoelectric constants effectively. We have calculated the wurtzite deformation potential constants D1–D5 considering the internal strain correction. The piezoelectric constants of wurtzite and also zinc-blende crystals have been calculated using the Berry phase approach and we have found from first principles that those of BN have an inverse sign in c...

First-principles study on electronic and elastic properties of BN, AlN, and GaN

The phase diagram of boron nitride (BN) is similar to that of carbon, incorporating phases at high temperatures and pressures whose structures and physical properties resemble diamond1–9. Cubic zinc-blende-structured BN is especially important because it is extremely hard—second only to diamond. Here we report the first measurement of the 300-K equation of state of this material to ultrahigh pressures (115 GPa), and obtain a zero-pressure bulk modulus of 369 ± 14 GPa. A theoretical equation of state derived from first-principles pseudopotential calculations yields a 300-K isotherm that agrees with our experimental results to better than 2.5% in volume and 2.0% in bulk modulus. The high-pressure Hugoniot (shock-wave equation of state) calculated from our equation of state for BN is in good agreement with existing shock-wave data. Our study illustrates the reliability of current experimental techniques (such as the ruby-fluorescence calibra-tion) and theoretical methods (pseudopotentials) for characterizing the behaviour of superhard, incompressible materials under high pressure.

Experimental and theoretical equation of state of cubic boron nitride

Characterization of wurtzite type boron nitride synthesized by shock compression

Structural Changes of Boron Nitride Caused by Multiple Shock-Compressions

The magnetoflyer method has been developed as a convenient and fiducial technique for measuring projectile velocities from propellent and gas guns. The velocity is estimated from the time interval between two electromotive force signals when the projectile, which includes a small ferrite magnet, passes through two pick‐up coils. It was confirmed that the method was available up to 5 mm/μs.

Magnetoflyer method for measuring gas‐gun projectile velocities

Structure Determination of Boron Nitride Transformed by Shock Compression

Crystallization of splat-cooled V 2 O 5 under high pressure was examined. By X-ray diffraction and thermal analysis, it is shown that the non-crystalline V 2 O 5 crystallizes dramatically up to about 6 kb. Crystallization temperature increases with increasing pressure under this pressure range. At higher pressure (20–60 kbar), crystallization occurs gradually and the crystallization temperature has a slight tendency to decrease with increasing pressure.

Shinroku Saito

Papers

Characterization of wurtzite type boron nitride synthesized by shock compression

Structural Changes of Boron Nitride Caused by Multiple Shock-Compressions

Magnetoflyer method for measuring gas‐gun projectile velocities

Structure Determination of Boron Nitride Transformed by Shock Compression

The effect of high pressure on crystallization of splat-cooled V2O5