Figure 6.

Cross-sectional SEM images of porous silicon layers formed after the anodization of the experimental wafer: (a) overall view, Piso-PS and Pbase-PS indicate the porous silicon layers formed from the Piso and Pbase diffusions, respectively; (b) focus on the frontier between Piso-PS and Pbase-PS areas; (c) morphology of the Piso-PS layer; (d) morphology of the Pbase-PS layer.

Menard et al. Nanoscale Research Letters 2012 7:566   doi:10.1186/1556-276X-7-566
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