M.  Timpel, Nardi, M. Vittorio, Krause, S., Ligorio, G., Christodoulou, C. N., Pasquali, L., Giglia, A., Frisch, J., Wegner, B., Moras, P., and Koch, N., ?Surface modification of ZnO(0001)-Zn with phosphonate-based self-assembled monolayers: Binding modes, orientation, and work function?, Chemistry of materials, vol. 26, pp. 5042?5050, 2014.