Selected Area Electron Diffraction Study of Twinned α-Fe[sub 2]O[sub 3] Bladelike Platelet Growths on Iron

Tollman, R. L.; Gulbransen, Earl A.

doi:10.1149/1.2411422

Cited by 30 publications

(5 citation statements)

References 8 publications

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“…The second set of reflections (Figure S7b, Supporting Information) we encountered more frequently, e.g., for the zones [40‐41], [10‐10], [4‐1‐31], and [42‐6‐1]. Such reflections were already observed in a diffraction study on twinned bladelike platelets and reconfirmed in our group. These reflections are explainable as intersection points of elongated relrods (in consequence of planar defects) and the Ewald sphere …”

Section: Resultssupporting

confidence: 78%

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Lupan

Postica

Wolff

et al. 2017

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124

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A composed morphology of iron oxide microstructures covered with very thin nanowires (NWs) with diameter of 15-50 nm has been presented. By oxidizing metallic Fe microparticles at 255 °C for 12 and 24 h, dense iron oxide NW networks bridging prepatterned Au/Cr pads are obtained. X-ray photoelectron spectroscopy studies reveal formation of α-Fe O and Fe O on the surface and it is confirmed by detailed high-resolution transmission electron microscopy and selected area electron diffraction (SAED) investigations that NWs are single phase α-Fe O and some domains of single phase Fe O . Localized synthesis of such nano- and microparticles directly on sensor platform/structure at 255 °C for 24 h and reoxidation at 650 °C for 0.2-2 h, yield in highly performance and reliable detection of acetone vapor with fast response and recovery times. First nanosensors on a single α-Fe O nanowire are fabricated and studied showing excellent performances and an increase in acetone response by decrease of their diameter was developed. The facile technological approach enables this nanomaterial as candidate for a range of applications in the field of nanoelectronics such as nanosensors and biomedicine devices, especially for breath analysis in the treatment of diabetes patients.

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Section: Resultssupporting

confidence: 78%

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Lupan

Postica

Wolff

et al. 2017

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124

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“…In addition to providing another oxidizing species, the water vapor generated in situ is also expected to catalyze the decomposition of oxygen gas required for the subsequent oxidation of the iron species . The importance of water vapor for quick and dense NW growth has been pointed out in the literature before. , Simultaneously utilizing shot-peening and introducing trace amounts of water vapor results in a high density of uniform NW growth across the substrate (Figure D). The differences in physical appearance between the steel foils are also striking.…”

Section: Resultsmentioning

confidence: 94%

“…45 The importance of water vapor for quick and dense NW growth has been pointed out in the literature before. 36,46 Simultaneously utilizing shot-peening and introducing trace amounts of water vapor results in a high density of uniform NW growth across the substrate (Figure 1D). The differences in physical appearance between the steel foils are also striking.…”

Section: ' Results and Discussionmentioning

confidence: 99%

Improved Synthesis and Electrical Properties of Si-Doped α-Fe₂O₃ Nanowires

Lukowski

Jin

2011

J. Phys. Chem. C

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We report an improved method to synthesize α-Fe2O3 (hematite) nanowires (NWs) via thermal oxidation that significantly reduces reaction time while improving NW density and uniformity. Stress introduced by shot-peening the starting steel foils and the relief of such stress seem to play an important role in promoting uniform one-dimensional growth. Water vapor is also shown to strongly influence both the density and the morphology of the grown nanostructures. Furthermore, although the as-grown NWs exhibit the high average resistivity (4 × 102 ± 4 × 102 Ω·m) associated with undoped hematite, chemical vapor deposition of silane coating these NWs, followed by an annealing step, produces silicon-doped α-Fe2O3 NWs that exhibit a significantly improved average resistivity of 4 × 10–3 ± 6 × 10–3 Ω·m. High-resolution electron microscopy, elemental mapping by EDS, and further study of their electrical properties attribute the increased conductivity to lattice doping. These doped hematite NW arrays are promising candidates for potential application as photoanodes in photoelectrochemical solar cells.

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“…Crystallographic studies revealed that bladelike whiskers or blades consist of twinned oxide crystals. It is believed that the oxide grows from internal transport of iron to tips along twin interfaces where the diffusion of iron was faster than oxygen [15]. Water vapor would prompt the formation of whiskers significantly.…”

Section: Whisker Formationmentioning

confidence: 99%

Corrosion Behavior of Cr-Containing Alloys under Cyclic Reaction in Wet CO2 Gas at 650°C

Zhang

Young

2021

Oxid Met

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The corrosion behavior of seven commercial alloys (602CA, 310SS, 253MA, 800H, F321, F316L, 304SS) was investigated in a wet CO 2 gas under cyclic reactions up to 150 cycles at 650°C. Water vapor accelerated the oxidation of all alloys. Alloy 602CA was alumina-forming in dry CO 2 but changed to chromia-forming in the wet gas. In wet gas, the 310SS and 253MA underwent breakaway oxidation which was enhanced by the cyclic reaction. Spallation and buckling of the outer iron oxide scale were considerable for the less-protective alloys, 800H, F321, F316L and 304SS, with the formation of reddish iron oxide whiskers on the scale surface. The carburisation of F321, F316L and 304SS was identified and found to be reduced significantly by the presence of water vapor. The effect of water vapor on oxidation, carburisation, oxide buckling and whisker formation is discussed in comparison with that in dry gas.

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Selected Area Electron Diffraction Study of Twinned α-Fe[sub 2]O[sub 3] Bladelike Platelet Growths on Iron

Cited by 30 publications

References 8 publications

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Improved Synthesis and Electrical Properties of Si-Doped α-Fe₂O₃ Nanowires

Corrosion Behavior of Cr-Containing Alloys under Cyclic Reaction in Wet CO2 Gas at 650°C

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Selected Area Electron Diffraction Study of Twinned α-Fe[sub 2]O[sub 3] Bladelike Platelet Growths on Iron

Cited by 30 publications

References 8 publications

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe2O3 Nanowire

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe2O3 Nanowire

Improved Synthesis and Electrical Properties of Si-Doped α-Fe2O3 Nanowires

Corrosion Behavior of Cr-Containing Alloys under Cyclic Reaction in Wet CO2 Gas at 650°C

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Product

Resources

About

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Localized Synthesis of Iron Oxide Nanowires and Fabrication of High Performance Nanosensors Based on a Single Fe₂O₃ Nanowire

Improved Synthesis and Electrical Properties of Si-Doped α-Fe₂O₃ Nanowires