A pathway to desired functionalities in vertically aligned nanocomposites and related architectures

Abstract

Epitaxial vertically aligned nanocomposites (VANs) and their related architectures have shown many intriguing features that are not available from conventional two-dimensional planar multilayers and heterostructures. The ability to control constituent, interface, microstructure, strain, and defects based on VANs has enabled the multiple degrees of freedom to manipulate the optical, magnetic, electrochemical, electronic, ionic, and superconducting properties for specific applications. This field has rapidly expanded from the interest in oxide:oxide to oxide:metal, metal:nitride and nitride:nitride systems. To achieve unparalleled properties of the materials, three-dimensional super-nanocomposites based on a hybrid of VAN and multilayer architectures have been recently explored as well. The challenges and opportunities of VAN films are also discussed in this article.

Structural and Optical Properties of High Entropy (La,Lu,Y,Gd,Ce)AlO3 Perovskite Thin Films

“…Additionally, strain-engineering through the use of alternative substrates and nanocomposite epitaxial relationships may allow for further tuning of structural and optical properties. [44,[66][67][68] We would also like to emphasize that there exists the possibility of an optical cascade for downgraded emission. As discussed previously, [17][18][19] energy transfer for Ce 3+ → Tb 3+ → Eu 3+ can occur.…”

“…Additionally, strain‐engineering through the use of alternative substrates and nanocomposite epitaxial relationships may allow for further tuning of structural and optical properties. [ 44 , 66 , 67 , 68 ]…”

Strain Engineering: A Pathway for Tunable Functionalities of Perovskite Metal Oxide Films

“…It is accepted that the pillar size d , the density of the nanopillars, as well as the defects along the vertical interface determine the overall strain state of vertically aligned nanocomposites [ 32 ]. Figure 11 shows the general relationship between the vertical strain, the pillar feature size, and the volume of pillars [ 102 ]. Figure 11 also shows the general correlation among the growth temperature, pillar size, and strain state.…”

Self-Assembled Epitaxial Cathode–Electrolyte Nanocomposites for 3D Microbatteries

“…Self-assembled vertically aligned nanocomposite (VAN) thin films formed by two immiscible oxides can exhibit unique properties not available in single-phase materials. − The immiscibility of the two phases, e.g . perovskite–spinel combinations, − forms the foundation of the self-assembly procedure resulting in highly ordered nanopillar/matrix structures.…”