Two-dimensional (2D) materials provide extraordinary opportunities for exploring phenomena arising in atomically thin crystals. Beginning with the first isolation of graphene, mechanical exfoliation has been a key to provide high-quality 2D materials but despite improvements it is still limited in yield, lateral size and contamination. Here we introduce a contamination-free, one-step and universal Au-assisted mechanical exfoliation method and demonstrate its effectiveness by isolating 40 types of single-crystalline monolayers, including elemental 2D crystals, metal-dichalcogenides, magnets and superconductors. Most of them are of millimeter-size and high-quality, as shown by transfer-free measurements of electron microscopy, photo spectroscopies and electrical transport. Large suspended 2D crystals and heterojunctions were also prepared with high-yield. Enhanced adhesion between the crystals and the substrates enables such efficient exfoliation, for which we identify a common rule that underpins a universal route for producing large-area monolayers and thus supports studies of fundamental properties and potential application of 2D materials.
Enrichment of rhombohedral stacking by mechanical exfoliation of graphite
Hungarian Research Network, Centre for Energy Research（匈牙利研究网络能源研究中心）；MTA - HUN-REN EK Lendület “Momentum” Topology in Nanomaterials Research Group（MTA-HUN-REN EK Lendulet“动量”纳米材料拓扑研究组）；Óbuda University（奥比乌斯大学）；Budapest University of Technology and Economics（布达佩斯技术与经济大学）；ELTE Eötvös Loránd University（罗兰大学）
From Graphene to Bismuth Telluride: Mechanical Exfoliation of Quasi-2D Crystals for Applications in Thermoelectrics and Topological Insulators
碲化铋（Bi 2 Te 3）及其合金是目前已知的最好的块体热电材料。Bi 2 Te 3的堆叠准二维（2D）层也被识别为拓扑绝缘体。在本文中，我们描述了一种方法，石墨烯启发剥离结晶碲化铋薄膜的厚度为几个原子。原子级薄膜悬浮在Si/SiO2衬底的沟槽中，并进行详细的表征。范德华能隙的存在使我们能够将Bi_2 Te_3晶体分解成五个单元--由Te（1）-Bi-Te（2）-Bi-Te（1）组成的五个单原子片。通过改变原子平面的厚度和顺序，我们能够创建设计师非化学计量的准2D晶体薄膜，改变它们的成分和掺杂以及其他特性。剥离的五元组和超薄膜具有低热导率、高电导率和增强的热电性能。所获得的结果为制备用于热电器件的具有强空间限制的载流子和声学声子的碲化铋晶体量子阱堆叠铺平了道路。用于制备Te（1）-Bi-Te（2）-Bi-Te（1）的自支撑准二维层的开发的技术为拓扑绝缘体的研究及其可能的实际应用创造了动力。
Ultrasound cavitation and exfoliation dynamics of 2D materials re-vealed in operando by X-ray free electron laser megahertz imaging
University of Hull（赫尔大学）；European XFEL（欧洲X射线自由电子激光装置）；Lund University（隆德大学）；University of Greenwich（格林威治大学）；Oxford Brookes University（牛津布鲁克斯大学）；Brunel University London（布鲁内尔伦敦大学）；University of Oxford（牛津大学）；La Trobe University（拉筹伯大学）；The Diamond Light Source Ltd（钻石光源有限公司）；Deutsches Elektronen-Synchrotron DESY（德国电子同步加速器研究所）
Exfoliation and van der Waals heterostructure assembly of intercalated ferromagnet Cr1/3TaS2
铁磁范德华（vdW）材料是用于具有全二维材料异质结构的自旋电子器件的需求。在这里，我们证明了机械剥离的磁性原子嵌入过渡金属二硫属化物Cr 1/3 TaS 2从其散装晶体，以前这样的插层材料被认为是难以剥离。剥离的纳米厚的薄片的磁输运揭示了低于其居里温度TC ~ 110 K的铁磁有序性以及强的面内磁各向异性;这些与其本体性质相同。此外，范德瓦尔斯异质结构组装的Cr 1/3 TaS 2与另一个插入铁磁体Fe 1/4 TaS 2证明使用干转移方法。制造的异质结组成的Cr 1/3 TaS 2和Fe 1/4 TaS 2与天然Ta 2 O 5氧化物隧道势垒之间的隧道磁阻（TMR），揭示可能的自旋注入和检测这些剥离铁磁材料通过VDW结。
Giant Exfoliation Induced Magnetic Coercivity in Fe$_3$GaTe$_2$
National High Magnetic Field Laboratory（国家强磁场实验室）；Florida State University（佛罗里达州立大学）；The University of Edinburgh（爱丁堡大学）；Argonne National Laboratory（阿贡国家实验室）；Donostia International Physics Center (DIPC)（圣塞巴斯蒂安国际物理中心）；Baylor University（贝勒大学）
Anisotropic thermo-mechanical response of layered hexagonal boron nitride and black phosphorus: application as a simultaneous pressure and temperature sensor
