Figure 7.

FESEM images of TNT fabricated in EG containing 0.5 wt% NH4F and 0.2 wt% H2O via single-step anodization for different times: (a) top surface view after 72 h of anodization, (b) top surface view after 11 h of anodization, (c) top surface view after ultrasonic agitation of 20 min in DI H2O, (d) magnified image of the marked area of (c), and (e) top surface view of TNP structure obtained after prolonged anodizing time (72 h) via second-step anodization in glycerol-based electrolyte.

Ali et al. Nanoscale Research Letters 2011 6:332   doi:10.1186/1556-276X-6-332
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