Autonomous robotic searching and assembly of two-dimensional crystals to build van der Waals superlattices

Satoru Masubuchi (), Masataka Morimoto, Sei Morikawa, Momoko Onodera, Yuta Asakawa, Kenji Watanabe, Takashi Taniguchi and Tomoki Machida ()
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Satoru Masubuchi: University of Tokyo
Masataka Morimoto: University of Tokyo
Sei Morikawa: University of Tokyo
Momoko Onodera: University of Tokyo
Yuta Asakawa: University of Tokyo
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Tomoki Machida: University of Tokyo

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract Van der Waals heterostructures are comprised of stacked atomically thin two-dimensional crystals and serve as novel materials providing unprecedented properties. However, the random natures in positions and shapes of exfoliated two-dimensional crystals have required the repetitive manual tasks of optical microscopy-based searching and mechanical transferring, thereby severely limiting the complexity of heterostructures. To solve the problem, here we develop a robotic system that searches exfoliated two-dimensional crystals and assembles them into superlattices inside the glovebox. The system can autonomously detect 400 monolayer graphene flakes per hour with a small error rate (

Date: 2018
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DOI: 10.1038/s41467-018-03723-w

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