“…There have also been some attempts to use β-Fe 2 O 3 NPs in biomedicine [63], sensors and lithium-ion batteries [20,64]. [193] Oxidation of steel in an O 2 -N 2 atmosphere at high temperature Improvement of steel coating quality TEM, EDS, GD-OES 3 [194] Corrosion of chromia-forming alloys in simplified combustion atmosphere Fireside corrosion studies EDS, XRD [195] Porous α-Fe 2 O 3 nanostructures Hydrothermal synthesis from FeCl 3 •6H 2 O in a microwave reactor Lithium-ion batteries XRD, TEM, SAED, XPS, TG-DTG [196] Sol-gel transformations of precursors in self-organized nanocellulose Energy conversion and storage XRD, TEM, SAED, XPS, TG-DSC [197] Martian hematite deposits Precipitation from oxygenated iron-rich water or biomineralization Search for evidence of life on Mars EDS, TEM [198] Hematite layers on sandstone grains Precipitation from oxidizing iron-saturated fluid Geochemistry XRD, ICP-MS 4 [199] Double-walled hematite nanotubes Growth of Fe nanowires inside porous templates and oxidation Photocatalysis, biomedicine XRD, EELS, HAADF-STEM, RS [200]…”