论文标题
原子较薄的硝酸硼的机械性能和层间相互作用的作用
Mechanical Properties of Atomically Thin Boron Nitride and the Role of Interlayer Interactions
论文作者
论文摘要
原子上稀薄的氮化硼（BN）纳米片是重要的二维纳米材料，具有许多与石墨烯不同的独特特性，但其机械性能的研究仍然很大。在这里，我们报告说，高质量的单晶单晶和几层bn纳米片是最强的电绝缘材料之一。更有趣的是，几层BN显示的机械行为与压痕下的几层石墨烯截然不同。与石墨烯形成鲜明对比的是，石墨烯的强度从1层增加到8时降低了30％以上，BN纳米片的机械强度对增加厚度不敏感。我们将这种差异归因于不同的层间相互作用，因此在这两种材料下的滑动趋势。 BN纳米片的机械完整性明显更好，使它们比石墨烯更具吸引力的候选者，例如，例如作为机械增援。
Atomically thin boron nitride (BN) nanosheets are important two-dimensional nanomaterials with many unique properties distinct from those of graphene, but the investigation of their mechanical properties still greatly lacks. Here we report that high-quality single-crystalline mono- and few-layer BN nanosheets are one of the strongest electrically insulating materials. More intriguingly, few-layer BN shows mechanical behaviors quite different from those of few-layer graphene under indentation. In striking contrast to graphene, whose strength decreases by more than 30% when the number of layers increases from 1 to 8, the mechanical strength of BN nanosheets is not sensitive to increasing thickness. We attribute this difference to the distinct interlayer interactions and hence sliding tendencies in these two materials under indentation. The significantly better mechanical integrity of BN nanosheets makes them a more attractive candidate than graphene for several applications, e.g. as mechanical reinforcements.
