论文标题
GAN-MOS2和GAN-WS2 CORE-SHELL纳米线增长的不同策略
Different strategies for GaN-MoS2 and GaN-WS2 core-shell nanowire growth
论文作者
论文摘要
一维（1D）纳米结构 - 纳米线（NWS） - 在不同类型的功能设备中积分具有有希望的属性。它们的性能甚至可以进一步增强，也可以通过将不同的有希望的材料（例如分层的范德华材料和常规半导体）结合到1D-1D-1D核心异质结构中来增强特定应用。在这项工作中，我们通过两种不同的方法证明了GAN-MOS2和GAN-WS2 CORE-SHELL NWS的生长：（1）在GAN NWS上的牺牲过渡金属氧化物涂层的溅射沉积的两步过程，然后是硫化。 （2）来自相应材料靶标的gan nws上的几层MOS2或WS2的脉冲激光沉积。通过扫描和透射电子显微镜，X射线衍射，微拉曼光谱和X射线光电子光谱法表征了制备的纳米结构。具有很少的MOS2和WS2壳的高结晶质量芯壳NW异质结构都可以通过两种路线制备。实验结果由理论电子结构计算支持，该计算证明了合成的核心壳NW异质结构的潜力，作为从水中有效产生氢的光催化剂。
One-dimensional (1D) nanostructures - nanowires (NWs) - exhibit promising properties for integration in different types of functional devices. Their properties can be enhanced even further or tuned for a specific application by combining different promising materials, such as layered van der Waals materials and conventional semiconductors, into 1D-1D core-shell heterostructures. In this work, we demonstrated growth of GaN-MoS2 and GaN-WS2 core-shell NWs via two different methods: (1) two-step process of sputter-deposition of a sacrificial transition metal oxide coating on GaN NWs followed by sulfurization; (2) pulsed laser deposition of few-layer MoS2 or WS2 on GaN NWs from the respective material targets. As-prepared nanostructures were characterized via scanning and transmission electron microscopies, X-ray diffraction, micro-Raman spectroscopy and X-ray photoelectron spectroscopy. High crystalline quality core-shell NW heterostructures with few-layer MoS2 and WS2 shells can be prepared via both routes. The experimental results were supported by theoretical electronic structure calculations, which demonstrated the potential of the synthesised core-shell NW heterostructures as photocatalysts for efficient hydrogen production from water.
