Figure 2.

FESEM images of (a) top view, (b) cross-section view, (c) high-magnification top view of BTs. (d) TEM image of a typical individual branched TiO2 nanotube shown in (a); insets are its SAED and HRTEM 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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