Atomically thin transition-metal dichalcogenide (TMDC) nanostructures are predicted to exhibit novel physical properties that make them attractive candidates for the fabrication of electronic and optoelectronic devices. However, TMDCs tend to grow in the form of two-dimensional nanoplates (NPs) rather than one-dimensional nanoribbons (NRs) due to their native layered structure. Herein, we have developed a space-confined and substrate-directed chemical vapor deposition strategy for the controllable synthesis of WS₂, WSe₂, MoSe₂, MoS₂, WS_2(1−x)Se_2x NPs and NRs. TMDC NRs with lengths ranging from several micrometers to 100 μm have been obtained and the widths of TMDC NRs can be effectively tuned. Moreover, we found that TMDC NRs show different growth behaviors on van der Waals (vdW) and non-vdW substrates. The micro-nano structures, optical and electronic properties of synthesized TMDC NRs have been systematically investigated. This approach provides a general strategy for controllable synthesis of TMDC NRs, which makes these materials easily accessible as functional building blocks for novel optoelectronic devices.

预计原子级薄的过渡金属二硫化物 (TMDC) 纳米结构将表现出新颖的物理特性，使其成为制造电子和光电设备的有吸引力的候选者。然而，TMDCs 由于其天然的层状结构，倾向于以二维纳米板 (NPs) 的形式而不是一维纳米带 (NRs) 的形式生长。在此，我们开发了一种用于 WS ₂、WSe ₂、MoSe ₂、MoS ₂、WS _{2(1− x )} Se _{2 x的可控合成的空间受限和基板定向化学气相沉积策略}NP 和 NR。已经获得了长度范围从几微米到 100 μm 的 TMDC NR，并且可以有效地调整 TMDC NR 的宽度。此外，我们发现 TMDC NR 在范德瓦尔斯 (vdW) 和非 vdW 基板上表现出不同的生长行为。已经系统地研究了合成的 TMDC NR 的微纳结构、光学和电子特性。这种方法为 TMDC NR 的可控合成提供了一种通用策略，这使得这些材料很容易作为新型光电设备的功能构建块。