E.  Javon, Gaceur, M., Dachraoui, W., Margeat, O., Ackermann, J., Saba, M. I., Delugas, P., Mattoni, A., Bals, S., and Van Tendeloo, G., ?Competing forces in the self-assembly of coupled ZnO nanopyramids?, ACS Nano, vol. 9, pp. 3685-3694, 2015.