Abstract
Van der Waals heterostructures are an excellent platform for studying intriguing interface phenomena, such as moiré and proximity effects. Many of these phenomena occurring in such heterostructures' interfaces and surfaces have so far been hampered because of their high sensitivity to disorder and interface contamination. Here, it reports a dry polymer-based assembly technique to fabricate arbitrary designer van der Waals heterostructures with atomically clean surfaces. The key features of the suspended dry pick-up and flip-over assembly technique are: 1) the heterostructure surface never comes into contact with polymers, 2) the assemble is entirely solvent-free, 3) it is entirely performed in a glovebox, and 4) it only requires temperatures below 130 °C. By performing ambient atomic force microscopy and atomically-resolved scanning tunneling microscopy on example heterostructures, it demonstrates the fabrication of air-sensitive heterostructures with ultra-clean interfaces and surfaces. It envisions that, due to the avoidance of polymer melting, this technique is potentially compatible with heterostructure assembly under ultra-high vacuum conditions, which promises ultimate heterostructure quality.
| Original language | English |
|---|---|
| Article number | 2300658 |
| Journal | Advanced Materials Interfaces |
| Volume | 11 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 4 2024 |
Funding
The authors thank Fran\u00E7ois C. Bocquet for technical support. Furthermore, the authors are grateful to the Helmholtz Nano Facility for its support regarding sample fabrication. The authors acknowledge funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement no 824109 (European Microkelvin Platform). J.M.C., T.W., K.J., M.T., and F.L. acknowledged funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the Priority Programme SPP 2244 (project nos. 443416235 and 422707584). J.M.C., F.S.T., and F.L. acknowledge funding from the Bavarian Ministry of Economic Affairs, Regional Development, and Energy within Bavaria's High-Tech Agenda Project \u201CBausteine f\u00FCr das Quantencomputing auf Basis topologischer Materialien mit experimentellen und theoretischen Ans\u00E4tzen\u201D. J.M.C. acknowledges funding from the Alexander von Humboldt Foundation. T.S., P.S., and O.O. acknowledge the support of APVV-20-0425, VEGA 2/0058/20, Slovak Academy of Sciences project IMPULZ IM-2021-42, COST action CA21144 (SUPERQUMAP) and EU ERDF (European regional development fund) Grant No. VA SR ITMS2014+ 313011W856. S.W. and F.S.T. acknowledge funding by the DFG through the SFB 1083 Structure and Dynamics of Internal Interfaces (project A12). M.T. acknowledges support from the Heisenberg Program (Grant No. TE 833/2-1) of the German Research Foundation. F.L. acknowledges financial support by Germany's Excellence Strategy - Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) through an Independence Grant. J.Q.Y. was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. K.W. and T.T. acknowledge support from the JSPS KAKENHI (Grant Numbers 20H00354, 21H05233, and 23H02052) and World Premier International Research Center Initiative (WPI), MEXT,\u00A0Japan. Open access funding enabled and organized by Projekt DEAL. The authors thank Fran\u00E7ois C. Bocquet for technical support. Furthermore, the authors are grateful to the Helmholtz Nano Facility for its support regarding sample fabrication. The authors acknowledge funding from the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement no 824109 (European Microkelvin Platform). J.M.C., T.W., K.J., M.T., and F.L. acknowledged funding by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the Priority Programme SPP 2244 (project nos. 443416235 and 422707584). J.M.C., F.S.T., and F.L. acknowledge funding from the Bavarian Ministry of Economic Affairs, Regional Development, and Energy within Bavaria's High\u2010Tech Agenda Project \u201CBausteine f\u00FCr das Quantencomputing auf Basis topologischer Materialien mit experimentellen und theoretischen Ans\u00E4tzen\u201D. J.M.C. acknowledges funding from the Alexander von Humboldt Foundation. T.S., P.S., and O.O. acknowledge the support of APVV\u201020\u20100425, VEGA 2/0058/20, Slovak Academy of Sciences project IMPULZ IM\u20102021\u201042, COST action CA21144 (SUPERQUMAP) and EU ERDF (European regional development fund) Grant No. VA SR ITMS2014+ 313011W856. S.W. and F.S.T. acknowledge funding by the DFG through the SFB 1083 Structure and Dynamics of Internal Interfaces (project A12). M.T. acknowledges support from the Heisenberg Program (Grant No. TE 833/2\u20101) of the German Research Foundation. F.L. acknowledges financial support by Germany's Excellence Strategy \u2010 Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) through an Independence Grant. J.Q.Y. was supported by the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. K.W. and T.T. acknowledge support from the JSPS KAKENHI (Grant Numbers 20H00354, 21H05233, and 23H02052) and World Premier International Research Center Initiative (WPI), MEXT, Japan.
Keywords
- 2D materials
- heterostructures
- interfaces
- scanning tunneling microscopy
- stacking