Abstract: Two-dimensional (2D) materials consisting of a single or a few layers of atoms have superior performance compared to conventional materials or their bulk counterparts in a variety of applications, because of their unique properties, including their flexibility, high specific surface area, and quasi-2D electron confinement. Single layer boron (borophene) sheets are a new type of 2D material, theoretically predicted at first and then recently synthesized on Ag(111) surfaces by bottom-up methods [1,2]. On the other hand, prior to our recent work  hydrogenated borophene (borophane, boron hydride, or hydrogen boride) sheets have only been reported from theoretical studies examining several structure types, and have not been realized experimentally. Borophane sheets are predicted to have interesting electronic and mechanical properties as well as favorable hydrogen storage capacity [4,5]. In this presentation, we report our recent studies about the experimental realization of 2D hydrogen boride (HB) sheets with an empirical formula of H1B1 created by the complete cation-exchange between protons and the magnesium cations in magnesium diboride (MgB2) .
Authors: Takahiro Kondo
Keywords: Hydrogen borides, Two-dimensional materials, Borophane