Vibrational properties of graphdiynes as 2D carbon materials beyond graphene.

ABSTRACT: Two-dimensional (2D) hybrid sp-sp² carbon systems are an appealing subject for science and technology. For these materials, topology and structure significantly affect electronic and vibrational properties. We investigate here by periodic density-functional theory (DFT) calculations the Raman and IR spectra of 2D carbon crystals belonging to the family of graphdiynes (GDYs) and having different structures and topologies. By joining DFT calculations with symmetry analysis, we assign the IR and Raman modes in the spectra of all the investigated systems. On this basis, we discuss how the modulation of the Raman and IR active bands depends on the different interactions between sp and sp² domains. The symmetry-based classification allows identifying the marker bands sensit

SUBMITTER: Serafini P 

PROVIDER: S-EPMC9425158 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature