Saunders Ashley P, Chen Victoria, Wang Jierong, Li Qitong, Johnson Amalya C, McKeown-Green Amy S, Zeng Helen J, Mac T Kien, Trinh M Tuan, Heinz Tony F, Pop Eric, Liu Fang
Department of Chemistry, 337 Campus Drive, Stanford, CA, 94305, USA.
Department of Electrical Engineering, 476 Lomita Mall, Suite 102, Stanford, CA, 94305, USA.
Small. 2024 Nov;20(47):e2403504. doi: 10.1002/smll.202403504. Epub 2024 Aug 14.
Confinement of monolayers into quasi-1D atomically thin nanoribbons could lead to novel quantum phenomena beyond those achieved in their bulk and monolayer counterparts. However, current experimental availability of nanoribbon species beyond graphene is limited to bottom-up synthesis or lithographic patterning. In this study, a versatile and direct approach is introduced to exfoliate bulk van der Waals crystals as nanoribbons. Akin to the Scotch tape exfoliation method for producing monolayers, this technique provides convenient access to a wide range of nanoribbons derived from their corresponding bulk crystals, including MoS, WS, MoSe, WSe, MoTe, WTe, ReS, and hBN. The nanoribbons are predominantly monolayer, single-crystalline, parallel-aligned, flat, and exhibit high aspect ratios. The role of confinement, strain, and edge configuration of these nanoribbons is observed in their electrical, magnetic, and optical properties. This versatile exfoliation technique provides a universal route for producing a variety of nanoribbon materials and supports the study of their fundamental properties and potential applications.
将单层材料限制在准一维原子级薄纳米带中可能会导致出现超越其体相和单层对应物所实现的新型量子现象。然而，目前除石墨烯外的纳米带种类的实验制备方法仅限于自下而上的合成或光刻图案化。在本研究中，引入了一种通用且直接的方法来将体相范德华晶体剥离成纳米带。类似于用于制备单层材料的胶带剥离法，该技术为从相应体相晶体中获得的各种纳米带提供了便利途径，包括MoS、WS、MoSe、WSe、MoTe、WTe、ReS和hBN。这些纳米带主要为单层、单晶、平行排列、扁平状且具有高纵横比。在这些纳米带的电学、磁学和光学性质中观察到了限制、应变和边缘构型的作用。这种通用的剥离技术为制备各种纳米带材料提供了一条通用途径，并支持对其基本性质和潜在应用的研究。
