Syntheses and Structures of New Graphite-like Materials of Composition BCN(H) and BC₃N(H)

Abstract

which are described as BCN(H) and BC 3 N(H), have been prepared by the interaction of acetonitrile with boron trichloride in a hydrogen and nitrogen atmosphere and acrylonitrile with boron trichloride, respectively. X-ray and electron diffraction analyses indicate that these materials have hexagonal structures similar to that of graphite. ESCA spectra and the possible chemical bonds suggest that the ideal structure of BCN is made of the unit structure of BC 2 N + BN, while BC 3 N is composed of BC 3 N + BNC 3 . A BCN(H) plate has a basal-plane conductivity of 1.28 (Ω cm) -1 at room temperature, while a BC 3 N(H) plate has that of 88.5 (Ω cm) -1 . Thermoelectric measurements indicate that both materials behave as p-type semiconductors and a BCN(H) plate has a high Seebeck coefficient of 300 µV/°K at room temperature in air.

Elastic properties of hybrid graphene/boron nitride monolayer

“…Hexagonal boron nitride (h-BN) monolayer [5] and graphene have similar 2D lattice structures but with very different physical properties. Interesting nanostructures can be made by mixing these two structures [6,7,8,9].…”

Graphene Synthesis and Band Gap Opening

“…There are some experimental works as well reporting successful synthesis of BCN materials [159][160][161][162] . BCN films have also been synthesized by CVD using C, B and N precursors.…”

“…However, the thickness of these films has been of the order of a few nanometers to microns. Moreover, these films showed poor crystalline quality [161][162][163] . All these works report atomic hybrids of B, C and N with semiconducting electronic properties.…”

Prediction of superhard carbon allotropes from the segment combination method

“…Among these elements, carbon is considered as the most active one due to its broad sp, sp 2 , and sp 3 hybridizing ability to bond to itself and to other elements. Although there are many theoretical predictions and experimental discoveries of superhard compounds, such as cBN [1], wBN [2], BC 5 [3,4], C 3 N 4 [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], BC 2 N [21][22][23][24][25][26][27][28][29][30], BCN diamonds [31,32], and other covalent compounds [12,18,20], the hardest material discovered until now is believed to be the pure 3D covalent carbon phase, cubic diamond (Cdiamond). In nature, element C mainly exists in its ground state of very soft graphite.…”