Figure 1.

Characterization images of the TNTAs see (a) and (b): (a) Low-magnification FESEM, insets are enlarged FESEM images of the top view and cross-section of its typical tubes, respectively; (b). TEM image of the individual TiO2 nanotube, insets are its HRTEM and SAED images of the marked areas, respectively.

Hu et al. Nanoscale Research Letters 2011 6:91   doi:10.1186/1556-276X-6-91
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