F285 (2010). Reversed crystal growth of perovskite CaTiO3, showing three different steps.
The paper demonstrates reversed growth of CaTiO3 hollow crystals. Reversed crystal growth mechanism may be used to explain the formation of the holes in many hollow crystals. [X. F. Yang, J. X. Fu, C. J. Jin, J. Chen, C. L. Liang, M. M. Wu, W. Z. Zhou, J. Am. Chem. Soc. 132, 14279-14287 (2010)].