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Atomically thin boron nitride

Hexagonal boron nitride can be exfoliated to mono or atomic layer sheets. Due to its analogous structure to graphene, atomically thin boron nitride is sometimes called white graphene. Mechanical properties: Atomically thin boron nitride is one of the strongest electrically insulating materials. Monolayer boron nitride has an average Young's modulus of 0.865TPa and fracture strength of 70.5GPa. In contrast to graphene, whose strength decreases dramatically with increased thickness, few-layer boron nitride sheets have a strength similar to monolayer boron nitride. Thermal conductivity: Atomically thin boron nitride has one of the highest thermal conductivity coefficients (851 W/mK at room temperature) among semiconductors and electrical insulators. Its thermal conductivity increases with reduced thickness due to less intra-layer coupling. Thermal stability: The air stability of graphene shows a clear thickness dependence: monolayer graphene is reactive to oxygen at 250 °C, strongly doped at 300 °C, and etched at 450 °C; in contrast, bulk graphite is not oxidized until 800 °C.] Atomically thin boron nitride has much better oxidation resistance than graphene. Monolayer boron nitride is not oxidized till 700 °C and can sustain up to 850 °C in the air; bilayer and trilayer boron nitride nanosheets have slightly higher oxidation starting temperatures.] The excellent thermal stability, high impermeability to gas and liquid, and electrical insulation make atomically thin boron nitride potential coating materials for preventing surface oxidation and corrosion of metals and other two-dimensional (2D) materials, such as black phosphorus. Better surface adsorption: Atomically thin boron nitride has been found to have better surface adsorption capabilities than bulk hexagonal boron nitride. According to theoretical and experimental studies, atomically thin boron nitride as adsorbent experiences conformational changes upon surface adsorption of molecules, increasing adsorption energy and efficiency. The synergic effect of the atomic thickness, high flexibility, stronger surface adsorption capability, electrical insulation, impermeability, and high thermal and chemical stability of BN nanosheets can increase the Raman sensitivity by up to two orders and, in the meantime, attain long-term stability and extraordinary reusability not achievable by other materials. If you are looking for high quality, high purity, and cost-effective Boron nitride, or if you require the latest price of Boron nitride, please feel free to email contact mis-asia.

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