Figure 2.

HRSEM cross-section image of a typical empty PSi sample. The columnar nature of the pores is visible. The inset shows a Ã×150,000 magnification of the indicated area. The structure of the pores’ walls is clearly visible.

Mula et al. Nanoscale Research Letters 2012 7:376   doi:10.1186/1556-276X-7-376
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