TY - JOUR T1 - Hydrogen storage of calcium atoms adsorbed on graphene: First-principles plane wave calculations A1 - Ataca, C. A1 - Akturk, E. A1 - Ciraci, S. JA - Physical Review B Y1 - 2009 VL - 79 SP - 041406-1 EP - 3 N1 - rapid communication so letter -1 yapildi ER -