Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei University , Wuhan 430062, PR China.
ACS Appl Mater Interfaces. 2017 Aug 16;9(32):27102-27110. doi: 10.1021/acsami.7b04765. Epub 2017 Aug 7.
Two-dimensional (2D) ultrathin metal chalcogenides represent a class of promising materials for various applications thanks to attractive physicochemical properties. However, a reliable pathway for fabricating ultrathin metal chalcogenides nanosheets, regardless of the bulk crystals of their 3D counterparts, still remains a challenge. Herein, we present a versatile solution-processed template synthesis strategy, in which a single molecular-level precursor anneals to ultrathin single-crystal nanosheets with the aid of lattice-matching templates, following the Frank-van der Merwe growth mode and featuring high quality, low cost, scalability, and processability. Following this strategy, SbS, MoS, and ZnS nanosheets are successfully prepared as representatives for materials whose bulk counterparts possess 1D, 2D, and 3D crystal structures, respectively, and the growth mechanism is confirmed by crystal mode analysis. As a proof-of-concept application, MoS and SbS nanosheets are used for gas sensor and flexible photodetector applications, respectively, which exhibit excellent performance. The method can also be easily extended to other ultrathin nanosheets like single metals, metal oxide, metal nitride, and heterostructures.
二维（2D）超薄金属硫属化物因其具有吸引人的物理化学性质而成为各种应用的一类有前途的材料。然而，无论其 3D 对应物的块状晶体如何，制造超薄金属硫属化物纳米片的可靠途径仍然是一个挑战。在此，我们提出了一种通用的溶液处理模板合成策略，其中单个分子级别的前体在晶格匹配模板的辅助下退火成超薄单晶纳米片，遵循弗兰克-范德梅韦生长模式，具有高质量、低成本、可扩展性和可加工性。采用这种策略，成功地制备了 SbS、MoS 和 ZnS 纳米片，分别作为其块状对应物具有 1D、2D 和 3D 晶体结构的材料的代表，并通过晶体模式分析证实了生长机制。作为概念验证应用，MoS 和 SbS 纳米片分别用于气体传感器和柔性光电探测器应用，表现出优异的性能。该方法还可以很容易地扩展到其他超薄纳米片，如单金属、金属氧化物、金属氮化物和异质结构。
