Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
Princeton Institute for Science and Technology of Materials, Princeton, NJ 08544, USA.
Sci Adv. 2023 Mar 22;9(12):eadd6167. doi: 10.1126/sciadv.add6167.
Liquid-phase chemical exfoliation can achieve industry-scale production of two-dimensional (2D) materials for a wide range of applications. However, many 2D materials with potential applications in quantum technologies often fail to leave the laboratory setting because of their air sensitivity and depreciation of physical performance after chemical processing. We report a simple chemical exfoliation method to create a stable, aqueous, surfactant-free, superconducting ink containing phase-pure 1T'-WS monolayers that are isostructural to the air-sensitive topological insulator 1T'-WTe. The printed film is metallic at room temperature and superconducting below 7.3 kelvin, shows strong anisotropic unconventional superconducting behavior with an in-plane and out-of-plane upper critical magnetic field of 30.1 and 5.3 tesla, and is stable at ambient conditions for at least 30 days. Our results show that chemical processing can make nontrivial 2D materials that were formerly only studied in laboratories commercially accessible.
液相化学剥离可以实现二维（2D）材料的工业规模生产，适用于广泛的应用。然而，许多在量子技术中有应用潜力的 2D 材料，由于其对空气的敏感性以及化学处理后物理性能的衰减，往往无法离开实验室环境。我们报告了一种简单的化学剥离方法，可创建一种稳定的、水性的、无表面活性剂的超导油墨，其中包含纯相 1T'-WS 单层，与对空气敏感的拓扑绝缘体 1T'-WTe 同构。打印的薄膜在室温下是金属性的，在 7.3 开尔文以下是超导的，表现出强烈的各向异性非常规超导行为，面内和面外上临界磁场分别为 30.1 和 5.3 特斯拉，在环境条件下稳定至少 30 天。我们的结果表明，化学处理可以使以前只在实验室研究的重要 2D 材料商业化。
