Boron nitride materials: an overview from 0D to 3D (nano)structures
01 Jul 2015-Wiley Interdisciplinary Reviews: Computational Molecular Science (John Wiley & Sons, Ltd)-Vol. 5, Iss: 4, pp 299-309
TL;DR: In this paper, the combination of BN and C materials forming heterostructures has gained an increasing importance in the nano-sciences, especially in the fields of nano-electronics, optoelectronics, field emission, and lubrication in extreme conditions of temperature.
Abstract: Boron nitride (BN) materials present different crystalline phases including fullerene-like (0D), nanotubes (1D, NTs), hexagonal (2D, h-BN), and cubic (3D) structures. These materials show a rich variety of physical and chemical properties with multiple potential applications in industry, science, and technology, especially in the fields of nano-electronics, optoelectronics, field emission, and lubrication in extreme conditions of temperature. BN compounds are chemically and thermally very stable and resistant to oxidation. The large electronic band gap confers to BN compounds complementary electronic properties to the C allotropes with similar structure. The combination of BN and C materials forming heterostructures has gained an increasing importance in the nano-sciences. In particular, heterostructures combining graphene with mono- and multi-layer h-BN, or C- with BN-nanotubes are the object of intensive study in nano-sciences due to their unique electronic properties. Applications based on BN structures have created great expectations and offer enormous possibilities in the next generation of electronic devices. However, the massive production of high-quality defect-free BN materials is still an experimental challenge. WIREs Comput Mol Sci 2015, 5:299–309. doi: 10.1002/wcms.1219
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Conflict of interest: The authors have declared no conflicts of interest for this article.
Citations
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TL;DR: This study provides a guided hydrogen bond strategy for thermally conductive polymer composites with good mechanical and electrical insulation properties in thermal management and other applications.
Abstract: Highly thermal conductive polymer composites with minimized content of fillers are desirable for handling the issue in thermal management in modern electronics. However, the difficulty of filler dispersion restricts the heat dissipation performance of thermoplastic composites and the intermolecular interaction is another crucial factor in this problem. In the present study, the hydrogen bond was used to regulate the formation of the three-dimensional boron nitride (3D BN) interconnected network to act as a high thermal conductive network in thermoplastic polyamide-imide (PAI) materials. The prepared electrical insulated PAI/3D–BN composites have a thermal conductivity (TC) of 1.17 W·m–1·K–1 at a low BN loading of 4 wt %/2 vol % and exhibit a thermal conductivity enhancement of 409%. We attribute the increased TC to the construction of 3D BN interconnected network and the hydrogen bond regulated between hydroxylated BN and polyvinyl alcohol, in which an effective thermal conductive network is constructed. ...
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Abstract: One-dimensional (1D) boron nitride (BN) nanostructures with a high aspect ratio are of prime interest due to their importance in fundamental research and wide-range potential applications. Herein we developed a facile method for the first synthesis of ultrafine porous BN nanofibers in high purity and a high yield. The method included two-steps, freeze-drying of a hot melamine/boric acid solution and post pyrolysis of the as-obtained products. The extremely rapid cooling of the hot melamine/boric acid solution during the freeze-drying process resulted in the formation of ultrafine precursors, which was the key for the final synthesis of porous BN nanofibers with downsized diameters (20–60 nm) and high aspect ratios. The as-synthesized ultrafine BN nanofibers possessed a high specific surface area and a large pore volume, which could be tuned by the pyrolysis parameters. All of these characteristics make the porous BN nanofibers promising in the applications of water treatment, hydrogen storage, catalyst support, etc. Especially, ultrafast adsorption of methylene blue (MB) in water has been demonstrated using the present porous BN nanofibers as an adsorbent.
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78 citations
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2,550 citations
TL;DR: The large area synthesis of h-BN films consisting of two to five atomic layers, using chemical vapor deposition, show a large optical energy band gap of 5.5 eV and are highly transparent over a broad wavelength range.
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2,362 citations