Figure 2From: Controllable preparation of Ni nanoparticles for catalysis of coiled carbon fibers growthSEM images and size distributions of nickel particles at different NaOH concentrations. SEM images (a,b,c) and size distributions (d,e,f) of nickel particles obtained with different NaOH concentration: (a,b) 0.8 M, (c,d) 1.2 M, and (e,f) 1.5 M.Back to article page