论文标题
高质量的六角硼硝酸盐从2D蒸馏
High-quality hexagonal boron nitride from 2D distillation
论文作者
论文摘要
高质量的二维（2D）材料的生产对于单层及其混合动力车的最终性能至关重要。六角硼（H-BN）可以预见到它是绝缘，紧密，平坦，透明且化学惰性的关键2D杂种和包装材料，尽管它很难达到最终质量。在这里，据报道，一种新方案用于产生单层H-BN，比化学蒸气沉积（CVD）中的材料显示出更高质量和更均匀性。我们将CVD H-BN与RH（111）分配，并将其转移到干净的金属表面。 BN和新底物之间的扭角产生了亚稳态的莫伊尔结构。退火超过1000 K会导致2D蒸馏，即从转移层的边缘催化的BN升华，随后将其缩合到优质H-BN中。这为高质量的2D材料生产远离CVD仪器提供了一种新的低成本方式。
The production of high-quality two-dimensional (2D) materials is essential for the ultimate performance of single layers and their hybrids. Hexagonal boron nitride (h-BN) is foreseen to become the key 2D hybrid and packaging material since it is insulating, tight, flat, transparent and chemically inert, though it is difficult to attain in ultimate quality. Here, a new scheme is reported for producing single layer h-BN that shows higher quality and much more uniformity than material from chemical vapor deposition (CVD). We delaminate CVD h-BN from Rh(111) and transfer it to a clean metal surface. The twisting angle between BN and the new substrate yields metastable moiré structures. Annealing above 1000 K leads to 2D distillation, i.e., catalyst-assisted BN sublimation from the edges of the transferred layer and subsequent condensation into superior quality h-BN. This provides a new and low-cost way of high-quality 2D material production remote from CVD instrumentation.
