Structure of porous two-dimensional boron crystals

In this work, we foresee the structure of a new class borophenes with smaller two-dimensional (2D) densities atoms than those explored so far for 2D boron crystals. Boron in porous tend to be five-coordinated contrast commonly investigated structures hexagonal holes which number nearest neighbors each atom varies from three six. High metallic character is usual feature borophenes, however, have also identified semimetallic borophene that turns into semiconductor upon unit-cell expansion. A $10%$ increase lattice constant gives rise an energy gap $0.3\phantom{\rule{4pt}{0ex}}\text{eV}$. This extends industry possible application