Macroscopic Transition Metal Dichalcogenide Monolayers from Gold-Tape Exfoliation Retain Intrinsic Properties
The "gold-tape" exfoliation technique can deterministically exfoliate macroscopic transition metal dichalcogenide (TMD) monolayers from bulk single crystals, overcoming limitations of the widely used "Scotch-tape" method, but concerns over the quality of the large-area monolayers remain. Here we introduce a critical step improving the gold-tape method by eliminating a previously unknown polymer residue layer on the TMD surface. The resulting pristine and millimeter-scale TMD monolayers exhibit defect density, charge carrier mobility, and excitonic properties intrinsic to the parent crystal. Imaging, transport, and spectroscopy on length scales spanning 6 orders of magnitude demonstrate the viability of gold-exfoliated TMD monolayers for the deterministic fabrication of high-performance van der Waals devices, including moiré interfaces.
Authors
- Luke N. Holtzman (ORCID: https://orcid.org/0009-0007-9898-7075)
- David D. Xu (ORCID: https://orcid.org/0000-0002-0413-7958)
- James Hone (ORCID: https://orcid.org/0000-0002-8084-3301)
- Sunggun Yoon (ORCID: https://orcid.org/0000-0003-2969-2904)
- Madisen Holbrook (ORCID: https://orcid.org/0000-0002-2019-3562)
- Chun‐Ying Huang (ORCID: https://orcid.org/0000-0001-6757-113X)
- Valerie Hsieh (ORCID: https://orcid.org/0000-0001-5799-2782)
- Esteban Rojas‐Gatjens (ORCID: https://orcid.org/0000-0001-9408-9621)
- Yiliu Li (ORCID: https://orcid.org/0000-0003-3959-2675)
- Taketo Handa (ORCID: https://orcid.org/0000-0002-9171-5364)
- Nicholas Olsen (ORCID: https://orcid.org/0000-0003-1606-8707)
- Abhay N. Pasupathy (ORCID: https://orcid.org/0000-0002-2744-0634)
- Katayun Barmak (ORCID: https://orcid.org/0000-0003-0070-158X)
- Cory R. Dean (ORCID: https://orcid.org/0000-0003-2967-5960)
- Eric A. Arsenault (ORCID: https://orcid.org/0000-0002-5363-3229)
- Xiaoyang Zhu (ORCID: https://orcid.org/0000-0002-2090-8484)
- Morgan Thinel (ORCID: https://orcid.org/0000-0002-1453-4594)
- Yufeng Liu (ORCID: https://orcid.org/0000-0002-2733-7733)
- Yinjie Guo
- Dorian Gavilanes
Institutions
- Columbia University (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-10-10
- DOI
- https://doi.org/10.1021/acs.nanolett.5c03371
- Citations
- 4
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 2.07