"Interlayer Carbon Bond Formation Induced by Hydrogen Adsorption in Few-Layer Supported Graphene "

Srivats Rajasekaran: Frank Abild-Pedersen, Hirohito Ogasawara, Anders Nilsson, and Sarp Kaya ; Physical Review Letters, 08/20/13.

Additional Authors: Frank Abild-Pedersen, Hirohito Ogasawara, Anders Nilsson, and Sarp Kaya

Abstract:

We report on the hydrogen adsorption induced phase transition of a few layer graphene (1 to 4 layers) to a diamondlike structure on Pt(111) based on core level x-ray spectroscopy, temperature programed desorption, infrared spectroscopy, and density functional theory total energy calculations. The surface adsorption of hydrogen induces a hybridization change of carbon from thesp2to thesp3bond symmetry, which propagates through the graphene layers, resulting in interlayer carbon bond formation. The structure is stabilized through the termination of interfacialsp3carbon atoms by the substrate. The structural transformation occurs as a consequence of high adsorption energy.

DOI: http://dx.doi.org/10.1103/PhysRevLett.111.085503