Author/Authors :
Yanguang Nie، نويسنده , , Jisheng Pan، نويسنده , , Zheng Zhang، نويسنده , , Jianwei Chai، نويسنده , , Lai Huang and Shijie Wang، نويسنده , , Chiam Sing Yang، نويسنده , , Daniel Li، نويسنده , , Chang Q. Sun، نويسنده ,
Abstract :
An in situ X-ray photoelectron emission investigation revealed that the size trend of the 2p3/2 binding-energy shift (BES) of Ni nanoclusters grown on SiO2 substrate follows the prediction of the bond order–length–strength (BOLS) correlation theory . Theoretical reproduction of the measurements turns out that the 2p3/2 binding energy of an isolated Ni atom is 850.51 eV and its intrinsic bulk shift is 2.70 eV. Findings confirmed that the skin-depth local strain and potential well quantum trapping induced by the shorter and stronger bonds between under-coordinated surface atoms provide perturbation to the Hamiltonian and hence dominate the size dependent BES.
