论文标题
介电响应和高度动态黑色的介电响应和水增强环境降解的层依赖性
Layer-dependence of dielectric response and water-enhanced ambient degradation of highly-anisotropic black As
论文作者
论文摘要
黑砷（BAS）是一种带有蜂窝结构的范德华分层材料，由于其各向异性特性和在设备中有希望的性能，因此获得了兴趣增加。在这里，使用STEM成像和光谱法研究了晶体结构，依赖厚度的介电响应以及BAS纳米片的环境稳定性。原子分辨率HAADF-STEM图像直接可视化三维结构并评估各向异性的程度。干eels用于测量BAS的介电响应作为层数的函数。最后，研究了不同环境环境下的BAS降解，突出了对空气中水分的高灵敏度。
Black arsenic (BAs) is a van der Waals layered material with a puckered honeycomb structure and has received increased interest due to its anisotropic properties and promising performance in devices. Here, crystalline structure, thickness-dependent dielectric responses, and ambient stability of BAs nanosheets are investigated using STEM imaging and spectroscopy. Atomic-resolution HAADF-STEM images directly visualize the three-dimensional structure and evaluate the degree of anisotropy. STEM-EELS is used to measure the dielectric response of BAs as a function of the number of layers. Finally, BAs degradation under different ambient environments is studied highlighting high sensitivity to moisture in the air.
