Fude Liu Liu, F., Collazo, R., Mita, S., Sitar, Z., Pennycook, S. J., & Duscher, G. (2008). Direct Observation of Inversion Domain Boundaries of GaN onc-Sapphire at Sub-ångstrom Resolution. Advanced Materials, 20(11), 2162–2165. https://doi.org/10.1002/adma.200702522 Zheleva, T., Lelis, A., Duscher, G., Liu, F., Levin, I., & Das, M. (2008). Transition layers at the SiO2/SiC interface. Applied Physics Letters, 93(2).