我在《A Sonochemical Method for Fabricating Aligned ZnO Nanorods》. Adv. Mater. 2007, 19, 749–753 中看到这样的描述: From the HRTEM image, the ZnO nanorods are highly crystalline with a lattice spacing of about 0.26 nm, which corresponds to the interlayer spacing of the (0002) planes in ZnO crystal lattice. Together with the TEM observation, the electron diffraction pattern suggests that the ZnO nanorod grew along the [0001] di-rection, the polar c-axis of the ZnO crystal lattice.