Size dependent 2p3/2 binding-energy shift of Ni nanoclusters on SiO2 support: Skin-depth local strain and quantum trapping

  • Nie Y
  • Pan J
  • Zhang Z
 et al. 
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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 [30]. 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.

Author-supplied keywords

  • Nanostructures
  • Ni
  • Surface core level shift

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  • Yanguang Nie

  • Jisheng Pan

  • Zheng Zhang

  • Jianwei Chai

  • Shijie Wang

  • Chiam Sing Yang

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