Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Department of Chemistry, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China.
Small. 2021 Apr;17(14):e2006866. doi: 10.1002/smll.202006866. Epub 2021 Mar 11.
Multinary layered 2D nanomaterials can exhibit distinct physicochemical properties and innovative applications as compared to binary 2D nanomaterials due to their unique crystal structures. However, it still remains a challenge for the high-yield preparation of high-quality multinary 2D nanosheets. Here, the high-yield and large-scale production of two quaternary metal thiophosphate nanosheets are reported, i.e., Ni Cr P S and Ni Cr P Se , via the liquid exfoliation of their layered bulk crystals. The exfoliated single-crystalline Ni Cr P S nanosheets, with a lateral size ranging from a few hundred nanometers to a few micrometers and thickness of 1.4 ± 0.2 nm, can be easily used to prepare flexible thin films via a simple vacuum filtration process. As a proof-of-concept application, the fabricated thin film is used as a supercapacitor electrode with good specific capacitance. These high-yield, large-scale, solution-processable quaternary metal thiophosphate nanosheets could also be promising in other applications like biosensors, cancer therapies, and flexible electronics.
多元层状二维纳米材料由于其独特的晶体结构，表现出与二元二维纳米材料不同的物理化学性质和创新应用。然而，高质量多元层状二维纳米片的高产制备仍然是一个挑战。本文通过层状体块晶体的液相剥离，报告了两种四元金属磷硫属化物纳米片（即 NiCrPS 和 NiCrPSe）的高产和大规模制备。剥离得到的单晶 NiCrPS 纳米片，其横向尺寸从几百纳米到几微米，厚度为 1.4±0.2nm，可通过简单的真空过滤过程轻松制备柔性薄膜。作为概念验证应用，所制备的薄膜被用作超级电容器电极，具有良好的比电容。这些高产、大规模、溶液处理的四元金属磷硫属化物纳米片在生物传感器、癌症治疗和柔性电子等其他应用中也具有广阔的应用前景。
