Pinpoint pick-up and bubble-free assembly of 2D materials using PDMS/PMMA polymers with lens shapes

Abstract

The key to achieving high-quality van der Waals heterostructure devices made by stacking two-dimensional (2D) layered materials lies in having a clean interface without interfacial bubbles and wrinkles. In this study, the pinpoint pick-up and transfer system of 2D crystals is constructed using polymers with lens shapes. We report the bubble-free and clean-interface assembly of 2D crystals in which unidirectional sweep of the transfer interface precisely controlled with the help of the inclined substrate pushes the bubbles away from the interface.

References in corpus (7)

• Boron nitride substrates for high-quality graphene electronics
• Light-emitting diodes by bandstructure engineering in van der Waals heterostructures
• Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices
• Recent progress in the assembly of nanodevices and van der Waals heterostructures by deterministic placement of 2D materials
• Fast pick up technique for high quality heterostructures of bilayer graphene and hexagonal boron nitride
• Layer-by-layer epitaxial growth of scalable WSe2 on sapphire by molecular-beam epitaxy
• Hydrophobic Ice Confined between Graphene and MoS2

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• Understanding interface properties in 2D heterostructure FETs