Facile Hydrothermal Synthesis of SrNb2O6Nanotubes with Rhombic Cross Sections

Novel SrNb 2 O 6 nanotubes with rhombic cross sections were produced via a facile hydrothermal route without any surfactants or templates by controlling the reaction conditions, such as the pH value and temperature. The prepared nanotubular powders were characterized using X-ray diffraction, field-emission electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). From the FESEM and HRTEM analysis, it was found that the morphological evolution of the one-dimensional tubular structure was originated from the stepwise bending growth in the [011] direction around the a- axis and its rhombic cross section was connected to the crystallographic nature.