Structure of the Fe2O3–Al2O3(0001) interface

Tietz, Lisa A.; Carter, C. Barry

doi:10.1080/01418619308207185

Cited by 17 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the tabular hematite morphology, preferential chemical etching at structurally defective locations on the basal plane and a "center-outward" progression of dissolution has already been demonstrated previously (Schwertmann and Cornell, 1991;Cornell and Giovanoli, 1993). Likewise, dislocation networks forming misfit boundaries have been shown to possess hexagonal symmetry parallel to the c-axis in hematite (Tietz and Carter, 1993), providing the only reasonable explanation for the striking, structurally controlled, linear dissolution channels radiating outward from the growth centers (e.g., Fig. 4b).…”

Section: Resultssupporting

confidence: 54%

Nonlocal bacterial electron transfer to hematite surfaces

Rosso

Zachara

Fredrickson

et al. 2003

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

Mechanisms by which dissimilatory iron-reducing bacteria utilize iron and manganese oxide minerals as terminal electron acceptors for respiration are poorly understood. In the absence of exogenous electron shuttle compounds, extracellular electron transfer is generally thought to occur through the interfacial contact area between mineral surfaces and attached cells. Possible alternative reduction pathways have been proposed based on the discovery of a link between an excreted quinone and dissimilatory reduction. In this study, we utilize a novel experimental approach to demonstrate that Shewanella putrefaciens reduces the surface of crystalline iron oxides at spatial locations that are distinct from points of attachment.

show abstract

Section: Resultssupporting

confidence: 54%

Nonlocal bacterial electron transfer to hematite surfaces

Rosso

Zachara

Fredrickson

et al. 2003

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

show abstract

“…It is interesting to note that other oxide heterophase systems maintain similar orientation relationships resulting in homopolar surfaces at the interface; these include NiO±CaO [26] [29]. From the results of the NiO±ZrO 2 , we may infer that these other systems also share a common oxygen plane at the interface which leads to electrostatic bonding across the boundary.…”

Section: Common Oxygen Planementioning

confidence: 94%

Three-dimensional atomic structure of NiO–ZrO2(cubic) interfaces

et al. 1998

View full text Add to dashboard Cite

AbstractÐThe three-dimensional atomic structure of low-energy NiO±ZrO 2 (cubic) interfaces is determined through a combination of electron imaging and spectroscopy techniques. High resolution electron microscopy, and Z-contrast STEM imaging with simultaneous electron energy loss spectroscopy are employed as complementary techniques for elucidating the structural and chemical aspects of the interface and associated interfacial relaxation mechaubic) interface. The planar interfaces show an atomically abrupt transition between the two phases which share a common oxygen plane at the boundary. Structural relaxations accommodating the lattice mismatch indicate that the boundary has relaxed to a low-energy con®guration. The resulting interface structure is found to facilitate strong bonding across the boundary as is re¯ected in the fracture behavior of the composite system. # 1998 Acta Metallurgica Inc.

show abstract

“…Their contrast is consistent with an hexagonal array of mis® t dislocations (Tietz andCarter 1993, Williams andCarter 1996). The four images shown in ® gs.…”

mentioning

confidence: 57%

Crystallization of calcium hexaluminate on basal alumina

Bar¹

1998

Philosophical Magazine A

View full text Add to dashboard Cite

The epitactic growth of calcium hexaluminate (CA 6 ) on the basal plane of alumina was observed during an investigation of the interaction between silicate glass ® lms deposited on single-crystal alumina (a -Al 2 O 3 ). Two distinctly di erent orientation relationships occurred. The ® rst can be described as perfect hexagonon-hexagon epitaxy with (1120) CA6 i ( 1010) Al2O3 and (0001) Al2O3 i ( 0001) CA6 . This relationship has 1.1% lattice mis® t in the substrate plane; the mis® t is accommodated at the interface by a hexagonal network of mis® t dislocations. In the second relationship the CA 6 grains are rotated about the substrate normal and can be explained by the coincident-site lattice model for phase boundaries. Both orientation relationships emphasize the in¯uence of substrate crystallography on the crystallization process. §

show abstract

Structure of the Fe₂O₃–Al₂O₃(0001) interface

Cited by 17 publications

References 20 publications

Nonlocal bacterial electron transfer to hematite surfaces

Nonlocal bacterial electron transfer to hematite surfaces

Three-dimensional atomic structure of NiO–ZrO2(cubic) interfaces

Crystallization of calcium hexaluminate on basal alumina

Contact Info

Product

Resources

About