Fig. 2From: Facile Synthesis of Porous Silicon Nanofibers by Magnesium Reduction for Application in Lithium Ion Batteries a XRD profiles of the fabricated NFs at each step, b EDX analyses of SiO2 NFs and HCl-treated NFs, c incremental pore areas of each fiber, and d Raman spectrum of graphene-coated Si NFsBack to article page