(a) TEM image of ZnO nanotube. (b) HRTEM image with FFT inserted. “S” indicates stacking faults. indicates zone axis.
XRD patterns of ZnO nanotube at selected pressures (unit of pressure: GPa).
The pressure dependence of the -spacings of ZnO nanotube.
Volume per formula unit change of ZnO nanotube with pressure. The data points are yielded from the refinement of the present experimental results, and the lines are fitted using third-order Birch–Murnaghan Equation of State.
The cell parameter changes with pressure of ZnO nanotube.
Pressure dependence of ratio. The dotted lines show the results of Kusaba et al. (Ref. 6), Desgreniers (Ref. 9), and Sowa et al. (Ref. 21). The solid lines are fitted from the present experimental data (square marks) and the dashed lines are drawn by hand.
Phase transition pressure of ZnO. indicates the initial pressure of phase transition, and indicates the completion pressure.
Bulk modulus volume change of ZnO. All the studies listed here applied the same kind of pressure transmitting medium and pressure marker (ruby) in the experiments.
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