二维材料的转移方法

二维材料及其异质结在电子学、光电子学等领域具有潜在应用,是延续摩尔定律的候选电子材料.二维材料的转移对于物性测量与器件构筑至关重要.本文综述了一些具有代表性的转移方法,详细介绍了各个方法的操作步骤,并基于转移后样品表面清洁程度、转移所需时间以及操作难易等方面对各个转移方法进行了对比归纳.经典干、湿法转移技术是进行物理堆...

Methods of transferring two-dimensional materials

The advent of two-dimensional(2D)materials,a family of materials with atomic thickness and van der Waals(vdWs)interlayer interactions,offers a new opportunity for developing electronics and optoelectronics.For example,semiconducting 2D materials are promising candidates for extending the Moore’s Law.Typical 2D materials,such as graphene,hexagonal boron nitride(h-BN),black phosphorus(BP),transition metal dichalcogenides(TMDs),and their heterostrcutures present unique properties,arousing worldwide interest.In this review the current progress of the state-of-the-art transfer methods for 2D materials and their heterostructures is summarized.The reported dry and wet transfer methods,with hydrophilic or hydrophobic polymer film assistance,are commonly used for physical stacking to prepare atomically sharp vdWs heterostructure with clear interfaces.Compared with the bottom-up synthesis of 2D heterostructures using molecular beam epitaxy(MBE)or chemical vapor deposition(CVD),the construction of 2D heterostructures by transfer methods can be implemented into a curved or uneven substrate which is suitable for pressure sensing,piezoelectric conversion as well as other physical properties’research.Moreover,the transfer of 2D materials with inert gas protected or in vacuum operation can protect moisture-sensitive and oxygen-sensitive 2D materials from degerating and also yield interfaces with no impurities.The efficient and non-destructive largearea transfer technology provides a powerful technical guarantee for constructing the 2D heterostructures and exploring the intrinsic physical and chemical characteristics of materials.Further development of transfer technology can greatly facilitate the applications of 2D materials in high-temperature superconductors,topological insulators,low-energy devices,spin-valley polarization,twistronics,memristors,and other fields.