Interface control by chemical and dimensional matching in an oxide heterostructure

Abstract

Interfaces between different materials underpin both new scientific phenomena, such as the emergent behaviour at oxide interfaces, and key technologies, such as that of the transistor. Control of the interfaces between materials with the same crystal structures but different chemical compositions is possible in many materials classes, but less progress has been made for oxide materials with different crystal structures. We show that dynamical self-organization during growth can create a coherent interface between the perovskite and fluorite oxide structures, which are based on different structural motifs, if an appropriate choice of cations is made to enable this restructuring. The integration of calculation with experimental observation reveals that the interface differs from both the bulk components and identifies the chemical bonding requirements to connect distinct oxide structures.

Alternate Restacking of 2 D CoNi Hydroxide and Graphene Oxide Nanosheets for Energetic Oxygen Evolution

“…On account of the layered natureo f hydroxides, as uperlattice-like structure,c omposed by the alternater estacking of positivelyc harged Co(OH) 2 nanosheets [11] and oppositely charged electroconductive matrix nanosheets, is considered promising as this distinctive construction can not only inherit the innate physicochemical advantages of the components, but also generate some synergistic effects at the heterointerfaces, contributing to the excellent electrocatalytic performance. [12,13] In addition, atomics ubstitution for the monometallic electrocatalysts has also been verifieda sa ne fficient strategyt oi mprove the electrocatalytic activity by both experimental and theoreticali nvestigations.A ccordingly,m ore endeavors are desired toward the morphology design and composition optimization of layered Co(OH) 2 materials.…”

Fast ionic conduction in semiconductor CeO2-δ electrolyte fuel cells

“…The interface between two insulating oxides can produce superconductivity 4,5 . In addition, semiconductor/ion conductor heterointerfaces, such as YSZ/SrTiO 3 6,8,10 and Ce 0.8 Gd 0.2 O 2-δ -CoFe 2 O 4 11 composites, can enhance the ionic conductivity through two material interfaces by several orders of magnitude [6][7][8][9][10] .…”

Yolk‐Shell‐Structured CuO−ZnO−In2O3 Trimetallic Oxide Mesocrystal Microspheres as an Efficient Catalyst for Trichlorosilane Production

“…organized CuO and ZnO into a binary nanocomposite mesocrystal, which possesses a large number of interfaces between p‐ and n‐type semiconductor nanoparticles. The efficient charge transfer at the interfaces may significantly amplify their applications in catalysis, energy conversion, and storage …”