Ultra-violet photoemission spectroscopy measurements for CO adsorption on the(2×2)-Cs precovered Ru(0001)surface were performed.The Cs 5p(5p3/2)level(Cs state)locates at 11.3 eV in binding energy for the(2×2...Ultra-violet photoemission spectroscopy measurements for CO adsorption on the(2×2)-Cs precovered Ru(0001)surface were performed.The Cs 5p(5p3/2)level(Cs state)locates at 11.3 eV in binding energy for the(2×2)-Cs overlayer on Ru(0001).Upon the CO adsorption,a new peak,which is associated with the Cs 5p state for the Cs adatoms influenced by the neighbouring CO adsorbed(the Cs+CO state),appears at the lower binding energy side of the Cs state.This new peak is at 10.8,eV for the CO saturation where the(2×2)-Cs+2CO compound layer is formed.This result gives clear evidence for local interaction of Cs and CO on the Ru(0001)surface.展开更多
We calculate the configurations, electronic structures, vibrational properties at the coronene/Ru（0001） interface, and adsorption of a single Pt atom on coronene/Ru（0001） based on density functional theory calcula...We calculate the configurations, electronic structures, vibrational properties at the coronene/Ru（0001） interface, and adsorption of a single Pt atom on coronene/Ru（0001） based on density functional theory calculations. The geometric structures and electronic structures of the coronene on Ru（0001） are compared with those of the graphene/Ru（0001）. The results show that the coronene/Ru（0001） can be a simplified model system used to describe the interaction between graphene and ruthenium. Further calculations of the vibrational properties of coronene molecule adsorbed on Ru（0001） suggest that the phonon properties of differently corrugated regions of graphene on Ru（0001） are different. This model system is also used to investigate the selective adsorption of Ft atoms on graphene/Ru（0001）. The configurations of Pt on coronene/Ru（0001） with the lowest binding energy give clues to explain the experimental observation that a Pt cluster selectively adsorbs on the second highest regions of graphene/Ru（0001）. This work provides a simple model for understanding the adsorption properties and vibrational properties of graphene on Ru（0001） substrate.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19774047 and 19874053the National Hi-Tech Inertial Confinement Fusion Committee.
文摘Ultra-violet photoemission spectroscopy measurements for CO adsorption on the(2×2)-Cs precovered Ru(0001)surface were performed.The Cs 5p(5p3/2)level(Cs state)locates at 11.3 eV in binding energy for the(2×2)-Cs overlayer on Ru(0001).Upon the CO adsorption,a new peak,which is associated with the Cs 5p state for the Cs adatoms influenced by the neighbouring CO adsorbed(the Cs+CO state),appears at the lower binding energy side of the Cs state.This new peak is at 10.8,eV for the CO saturation where the(2×2)-Cs+2CO compound layer is formed.This result gives clear evidence for local interaction of Cs and CO on the Ru(0001)surface.
基金Project supported by the National Natural Science Foundation of China （Grant No. 10874219）, the National Basic Research Program of China （Grant Nos. 2011CB921702 and 2011CB808401）, and the Shanghai Supercomputing Center, China.
文摘We calculate the configurations, electronic structures, vibrational properties at the coronene/Ru（0001） interface, and adsorption of a single Pt atom on coronene/Ru（0001） based on density functional theory calculations. The geometric structures and electronic structures of the coronene on Ru（0001） are compared with those of the graphene/Ru（0001）. The results show that the coronene/Ru（0001） can be a simplified model system used to describe the interaction between graphene and ruthenium. Further calculations of the vibrational properties of coronene molecule adsorbed on Ru（0001） suggest that the phonon properties of differently corrugated regions of graphene on Ru（0001） are different. This model system is also used to investigate the selective adsorption of Ft atoms on graphene/Ru（0001）. The configurations of Pt on coronene/Ru（0001） with the lowest binding energy give clues to explain the experimental observation that a Pt cluster selectively adsorbs on the second highest regions of graphene/Ru（0001）. This work provides a simple model for understanding the adsorption properties and vibrational properties of graphene on Ru（0001） substrate.
