Deterministic transfer of two-dimensional materials by all-dry viscoelastic stamping

Deterministic transfer of two-dimensional materials by all-dry viscoelastic stamping

(2014). In press | Andres Castellanos-Gomez *, Michele Buscema, Rianda Molenaar, Vibhor Singh, Laurens Janssen, Herre S. J. van der Zant and Gary A. Steele
The paper presents an all-dry transfer method for two-dimensional (2D) crystals using viscoelastic stamps, which does not require any wet chemistry steps. This method overcomes the limitations of traditional transfer techniques, such as the use of sacrificial polymer layers and wet chemistry, by leveraging the viscoelastic properties of the stamp material. The process is quick, efficient, clean, and can achieve high yield, making it suitable for fabricating complex heterostructures and freely suspended 2D layers. The method is demonstrated through the transfer of graphene and molybdenum disulfide (MoS₂) onto various substrates, including h-BN, mica, and pre-fabricated devices with trenches and electrodes. The technique allows for precise positioning of 2D crystals with sub-micron accuracy and can be applied to a wide range of materials, enabling the creation of heterostructures with large areas free of bubbles and wrinkles. The all-dry transfer method also facilitates the fabrication of freely suspended structures and has potential applications in nanotechnology.The paper presents an all-dry transfer method for two-dimensional (2D) crystals using viscoelastic stamps, which does not require any wet chemistry steps. This method overcomes the limitations of traditional transfer techniques, such as the use of sacrificial polymer layers and wet chemistry, by leveraging the viscoelastic properties of the stamp material. The process is quick, efficient, clean, and can achieve high yield, making it suitable for fabricating complex heterostructures and freely suspended 2D layers. The method is demonstrated through the transfer of graphene and molybdenum disulfide (MoS₂) onto various substrates, including h-BN, mica, and pre-fabricated devices with trenches and electrodes. The technique allows for precise positioning of 2D crystals with sub-micron accuracy and can be applied to a wide range of materials, enabling the creation of heterostructures with large areas free of bubbles and wrinkles. The all-dry transfer method also facilitates the fabrication of freely suspended structures and has potential applications in nanotechnology.
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