On the mechanism for plasma hydrogenation of graphene

J. D. Jones, W. D. Hoffmann, A. V. Jesseph, C. J. Morris, G. F. Verbeck, J. M. Perez
2010 Applied Physics Letters  
Strength of hydrogen bonds of water depends on local environment J. Chem. Phys. 136, 144305 (2012) Modeling of an ionic liquid electrospray using molecular dynamics with constraints J. Chem. Phys. 136, 124507 (2012) Epitaxial oxide bilayer on Pt (001) nanofacets J. Chem. Phys. 136, 044704 (2012) Comment on "The electromagnetic property of chemically reduced graphene oxide and its application as microwave absorbing material" [Appl. Phys. Lett. 98, 072906 (2011)] Appl. Phys. Lett. 100, 046101
more » ... tt. 100, 046101 (2012) Ignition of an exothermal reaction by collision between Al and Ni crystals We report that hydrogenation of mono-, bi-, and trilayer graphene samples via exposure to H 2 plasma occurs as a result of electron irradiation of H 2 O adsorbates on the samples, rather than H species in the plasma as reported by ͓Elias et al., Science 323, 610 ͑2009͔͒. We propose that the hydrogenation mechanism is electron-impact fragmentation of H 2 O adsorbates into H + ions. At incident electron energies Ͼ60 eV, we observe hydrogenation that is significantly more stable at temperatures Ͼ200°C than previously reported.
doi:10.1063/1.3524517 fatcat:shf3wlpzfjbstenzdmfjhcksx4