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

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 (<7%) and stack four cycles of the designated two-dimensional crystals per hour with few minutes of human interven

SUBMITTER: Masubuchi S 

PROVIDER: S-EPMC5897399 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature