Assessment of iron oxide particles within porous silicon. (a) Scanning electron micrograph of a cross-sectional region of a porous silicon sample with infiltrated magnetite nanoparticles with a size of 8 nm. (b) EDX spectrum taken at the marked region at the pore tips.
Rumpf et al. Nanoscale Research Letters 2012 7:445 doi:10.1186/1556-276X-7-445