Figure 3.

Raman spectra of the cross-section of a PSi layer at different positions. (a) PSi-air interface, (b) PSi, 3 μm from Si-PSi interface, (c) Si-PSi interface, and (d) Si. Pore size is 60 nm.

Hernandez et al. Nanoscale Research Letters 2012 7:364   doi:10.1186/1556-276X-7-364
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