19. Cui, Y., Y. Pan, L. Pascua, H. Qiu, C. Stiehler, H. Kuhlenbeck, N. Nilius and H.-J. Freund , “Evolution of the electronic structure of CaO thin films following Mo interdiffusion at high temperature.” Phys. Rev. B 2015, 91(3). https://doi.org/10.1103/PhysRevB.91.035418.
20. Cui, Y., C. Stiehler, N. Nilius and H.-J. Freund. “Probing the electronic properties and charge state of gold nanoparticles on ultrathin MgO versus thick doped CaO films.” Phys. Rev. B, 2015, 92(7). https://doi.org/10.1103/PhysRevB.92.075444.
21. Cui, Y., S. Tosoni, W.-D. Schneider, G. Pacchioni, N. Nilius and H.-J. Freund, “Phonon-Mediated Electron Transport through CaO Thin Films.” Phys. Rev. Lett. 2015, 114(1). https://doi.org/10.1103/PhysRevLett.114.016804.
22. Davis, E. M., K. Zhang, Y. Cui, H. Kuhlenbeck, S. Shaikhutdinov and H.-J. Freund, “Growth of Fe3O4(001) thin films on Pt(100): Tuning surface termination with an Fe buffer layer.” Surf. Sci. 2015, 636: 42-46. https://doi.org/10.1016/j.susc.2015.02.004.
23. Liu, B.-H., J. A. Boscoboinik, Y. Cui, S. Shaikhutdinov and H.-J. Freund, “Stabilization of Ultrathin Zinc Oxide Films on Metals: Reconstruction versus Hydroxylation.” J. Phys. Chem. C, 2015, 119(14): 7842-7847. https://doi.org/10.1021/acs.jpcc.5b01503.