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Borophene Has Potential in Flexible Electronics

Category: Science & Technology
Posted: 01:00PM

When it comes to two-dimensional materials, a lot of attention is given to graphene, an atom-thick sheet of carbon with several amazing properties. There are other 2D materials though, with their own special characteristics, and researchers at Rice University, Argonne National Laboratory, and Northwestern University have determined one could be particularly useful for flexible electronics.

This other 2D material is made of boron, called borophene, and has a triangular lattice structure with periodic hexagonal vacancies. What gives it potential in flexible electronics is its wavy, corrugated pattern, allowing it to be flexible. While graphene does have very desirable electronic properties, it is too stiff for use in devices that need to stretch. Borophene actually does prefer to be flat and stiff, like graphene, as this form has the lowest energy value, but not when grown on silver. The silver substrate causes the borophene to take on this wavy form, and even causes the silver to change its shape to match. This form can be preserved when the borophene is re-glued to a different substrate.

Both borophene and graphene possess a rich band structure that includes Dirac cones, which allow electrons to travel at relativistic speeds. Borophene also exhibits strong electron-phonon coupling that supports possible superconductivity.

Source: Rice University

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