Graphene terahertz generators for molecular circuits and sensors. Academic Article uri icon


  • Using ab initio density functional theory methods, the optimized structure of the single-, double-, and triple-layered graphene nanoribbons with different stacking orders and edges is calculated along with their Raman spectrums. For each case studied, graphene is found to be a potential source of vibrational signals in the terahertz region of the spectrum when molecules or another layer are adsorbed in the surface; this effect is independent of the hydrogen presence at the edges, and the stacking order. The visible low-frequency modes increase with the addition of graphene layers, and the number of modes may be influenced by the type of edges. The monolayer shows better performance due to the lower number of vibrational modes. The nanoribbon with fewer modes at the terahertz range is used to show a potential application of graphene acting as a sensor of single molecules.

published proceedings

  • J Phys Chem A

altmetric score

  • 3

author list (cited authors)

  • Rangel, N. L., & Seminario, J. M.

citation count

  • 67

complete list of authors

  • Rangel, Norma L||Seminario, Jorge M

publication date

  • December 2008