  Theoretical predictions have lead to the experimental synthesis of new low
dimensional layered structures. Herein we show for the very first time that
compounds of carbon monosulfide exhibit a great variety of layered
nanostructures, such as chains arrays, monolayers, and thin films. We find that
the chains arrays are the most stable because they are mainly
dimensionality-driven by the $sp^2$ hybridization of sulfur and carbon
orbitals. Furthermore, the chains arrays are direct gap semiconductors. In
contrast to thin films, the monolayers are stable at room temperature with a
semiconductor phase followed in energy by a metallic phase. Then, we achieve a
semiconductor-to-metal phase transition in carbon sulfur monolayers, which can
be driven by strain engineering controlling conductivity and carrier mobility.
