Two-dimensional (2D) hybrid sp-sp(2) 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 sp(2) domains. The symmetry-based classification allows identifying the marker bands sensitive to the different peculiar topologies. These results show the effectiveness of vibrational spectroscopy for the characterization of new nanostructures, deepening the knowledge of the subtle interactions that take place in these 2D materials.

Vibrational properties of graphdiynes as 2D carbon materials beyond graphene / P. Serafini, A. Milani, M. Tommasini, C. Castiglioni, D.M. Proserpio, C.E. Bottani, C.S. Casari. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 24:17(2022 May 04), pp. 10524-10536. [10.1039/d2cp00980c]

Vibrational properties of graphdiynes as 2D carbon materials beyond graphene

D.M. Proserpio;
2022

Abstract

Two-dimensional (2D) hybrid sp-sp(2) 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 sp(2) domains. The symmetry-based classification allows identifying the marker bands sensitive to the different peculiar topologies. These results show the effectiveness of vibrational spectroscopy for the characterization of new nanostructures, deepening the knowledge of the subtle interactions that take place in these 2D materials.
Settore CHIM/03 - Chimica Generale e Inorganica
4-mag-2022
12-apr-2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/926255
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