Details

Autor(en) / Beteiligte

• Huang, Yuan
• Pan, Yu-Hao
• Yang, Rong
• Bao, Li-Hong
• Meng, Lei
• Luo, Hai-Lan
• Cai, Yong-Qing
• Liu, Guo-Dong
• Zhao, Wen-Juan
• Zhou, Zhang
• Wu, Liang-Mei
• Zhu, Zhi-Li
• Huang, Ming
• Liu, Li-Wei
• Liu, Lei
• Cheng, Peng
• Wu, Ke-Hui
• Tian, Shi-Bing
• Gu, Chang-Zhi
• Shi, You-Guo
• Guo, Yan-Feng
• Cheng, Zhi Gang
• Hu, Jiang-Ping
• Zhao, Lin
• Yang, Guan-Hua
• Sutter, Eli
• Sutter, Peter
• Wang, Ye-Liang
• Ji, Wei
• Zhou, Xing-Jiang
• Gao, Hong-Jun

Titel

Universal mechanical exfoliation of large-area 2D crystals

Ist Teil von

• Nature communications, 2020-05, Vol.11 (1), p.2453-2453, Article 2453

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two-dimensional 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 two-dimensional 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 two-dimensional 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 two-dimensional 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 gold-assisted exfoliation method that underpins a universal route for producing large-area monolayers and thus supports studies of fundamental properties and potential application of two-dimensional materials.