Fig. 8
From: The Role of Growth Directors in Controlling the Morphology of Hematite Nanorods
XAS spectra of hematite samples obtained under a range of conditions: a Normalized x-ray absorption near edge spectroscopy (XANES) spectra measured at the Fe K-edge. b Extended x-ray absorption fine structure (EXAFS) Fourier transforms of k3χ(k). (a) 6 × 10−3 M phosphate-directing agent aged for 1 h; (b) as (a) but aged for 24 h; (c) as (a) aged for 72 h; (d) no phosphate-directing agent, aged 72 h; (e) 8 × 10−3 M phosphate aged for 72 h; (f) 1,2-diaminopropane-directing agent aged for 16 h; (g) phosphate-directed nanorods reduced in H2/N2 at 350 °C to form magnetite rods