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. © 2010 Elsevier B.V. All rights reserved.
Nie, Y., Pan, J., Zhang, Z., Chai, J., Wang, S., Yang, C. S., … Sun, C. Q. (2010). Size dependent 2p3/2 binding-energy shift of Ni nanoclusters on SiO2 support: Skin-depth local strain and quantum trapping. Applied Surface Science, 256(14), 4667–4671. https://doi.org/10.1016/j.apsusc.2010.02.069