Determination of ultrathin diamond films by Raman spectroscopy

作者：Chernozatonskii Leonid A^*; Mavrin Boris N; Sorokin Pavel B

来源：Physica Status Solidi B-Basic Solid State Physics, 2012, 249(8): 1550-1554.

DOI：10.1002/pssb.201147478

• density functional theory
• graphane
• graphene
• simulation of Raman spectroscopy
• thin diamond films

The study of Raman spectra of recently predicted ultrathin diamond films (diamanes) with nanometer thickness, transformed from multilayered graphenes by the adsorption of hydrogen is presented. Here we studied the phonon spectra of diamane structures in detail by ab initio method, especially the Raman and infrared (IR) vibrational modes. In particular, two-layered diamanes display Raman peaks near 1110, 1260, 1320, 2860?cm-1, and three-layered diamanes have a broad region (11101340?cm-1) of Raman shifts and peaks near 28302860?cm-1. The spectra are radically distinguished from the similar spectra of one to three layered graphenes and graphane. Left side: Atomic structure and vibration pattern of optical modes of ultrathin diamond (diamane). Right: Phonon densities of the states of graphane and diamanes.

• 出版日期2012-8