Theoretical study of electronic and mechanical properties of GeC nanowires

► We study the physical properties of passivated GeC nanowires within DFT. ► The band gaps of GeC and SiC nanowires are direct and very close between them. ► The Young's modulus of passivated nanowires follow this order: SiC > GeC > Si > Ge. ► The Poisson's ratio of non-carbide nanowires is larger than that of carbide nanowires.