Synthesis and characterization of single-crystalline α-Fe2O3 nanoleaves

Fate of adsorbed arsenate during phase transformation of ferrihydrite in the presence of gypsum and alkaline conditions

“…3). This band is typically attributed to structural disorder in the hematite crystal lattice (Bersani et al, 1999;Chernyshova et al, 2007;Lopez et al, 2009;Xu et al, 2009), with the degree of disorder increasing with crystallite size (Jubb and Allen, 2010). These observations are consistent with morphological characteristics with respect to crystal size as discussed above.…”

Identifying protons trapped in hematite photoanodes through structure–property analysis

“…This latter feature has been previously assigned to an infrared active E u vibrational mode for a-Fe 2 O 3 that becomes observable in Raman spectra when structural distortions break lattice symmetry. 34,36,50,51 FTIR measurements here support such an assignment (Fig. S2 †).…”

Synthesis, Growth Mechanism and Characterization of Single Crystalline α-Fe2O3 Spherical Nanoparticles

“…32 The weak ferromagnetic behavior of the -Fe 2 O 3 nanoparticles can be explained on the basis of canted spin. 52 The observed coercivity of the single crystalline -Fe 2 O 3 nanoparticles in the present study was found to be larger than that for urchin-like -Fe 2 O 3 superstructures with a coercivity of 92.235 Oe at room temperature. 19 In the case of rice and cube-shaped -Fe 2 O 3 the value of coercivity was observed to be 149.80 Oe and 335.16 Oe, respectively.…”

“…52 Some people believe that this peak attributed to the presence of a small amount of maghemite/magnetite, but more studies showed that it was due to Raman-forbidden LO E u mode. 52 behind the appearance of forbidden LO E u band is suggested to be extrinsic and originated due to the disorderinduced breaking of the symmetry properties for scattering the LO phonon. 54 The structural disorder may be found in solid solutions or the surface of some nanostructures.…”