LAUSR

Abstract Optical and thermoelectric properties of graphenylene and octagraphene nanotubes (GrNTs and OcNTs) are studied by means of first-principles calculations. The absorption coefficient, optical conductivity, and complex refractive index are calculated using the density functional theory and the Kubo–Greenwood formula. It is shown that the studied structures effectively absorb electromagnetic waves of the visible range, and these nanotubes are promising for the development of electromagnetic radiation sensors. Using the nonequilibrium Green functions method, transport coefficients and thermoelectric figure of merit are estimated and analyzed. The electronic and thermal characteristics of GrNTs and OcNTs are compared with the characteristics of graphene nanotubes.