Abstract:
: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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Huang Y,Pan YH,Yang R,Bao LH,Meng L,Luo HL,Cai YQ,Liu GD,Zhao WJ,Zhou Z,Wu LM,Zhu ZL,Huang M,Liu LW,Liu L,Cheng P,Wu KH,Tian SB,Gu CZ,Shi YG,Guo YF,Cheng ZG,Hu JP,Zhao L,Yang GH,Sutter E,Sutter P,Wandoi
10.1038/s41467-020-16266-wsubject
Has Abstractpub_date
2020-05-15 00:00:00pages
2453issue
1issn
2041-1723pii
10.1038/s41467-020-16266-wjournal_volume
11pub_type
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