Deterministic Fabrication of Twisted Van Der Waals Structures

摘要

In 2D van der Waals (vdW) materials, rotational misalignment by a twist anglebetween adjacent layers can significantly affect their properties, referred astwistronics. Accurate tuning of twist angle of vdW materials in a controllableand efficient way is highly required. Here a thin-film assisted transfer (TAT)technique that can controllably fabricate vdW structures with deterministictwist angles (accuracy of 0.37°) is developed. The transparent and ultrathinfilm as transfer medium ensures the visible and intact manipulation of monolayerbuilding blocks, thus constructing vdW architectures with multi-materialsand designated position. Multilayer homo-/hetero-architectures in thegeometry of series connection, spiral structure and chiral symmetry at deterministictwist angles are for the first time demonstrated. They can be locatedon various substrates for both structural analysis and device application. Thecapability of fabricating twisted homo-/hetero- vdW structures in a deterministic,high-throughput manner will serve as a powerful tool for twistronics.