17 Result(s)
within
Michael F. Toney
Nanotechnology
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Article
Simulation and characterization of cation disorder in \(\hbox {ZnGeP}_{2}\)
New optoelectronic materials are needed for improving the efficiency and reliability of devices such as solar cells. Cation ordering presents one means of controlling optoelectronic properties while introducin...
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Article
Electrochemical ion insertion from the atomic to the device scale
Electrochemical ion insertion involves coupled ion–electron transfer reactions, transport of guest species and redox of the host. The hosts are typically anisotropic solids with 2D conduction planes but can al...
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Fictitious phase separation in Li layered oxides driven by electro-autocatalysis
Layered oxides widely used as lithium-ion battery electrodes are designed to be cycled under conditions that avoid phase transitions. Although the desired single-phase composition ranges are well established n...
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Visualization of dynamic polaronic strain fields in hybrid lead halide perovskites
Excitation localization involving dynamic nanoscale distortions is a central aspect of photocatalysis1, quantum materials2 and molecular optoelectronics3. Experimental characterization of such distortions require...
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Manipulation and statistical analysis of the fluid flow of polymer semiconductor solutions during meniscus-guided coating
Recent work in structure–processing relationships of polymer semiconductors have demonstrated the versatility and control of thin-film microstructure offered by meniscusguided coating (MGC) techniques. Here, w...
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A map of the inorganic ternary metal nitrides
Exploratory synthesis in new chemical spaces is the essence of solid-state chemistry. However, uncharted chemical spaces can be difficult to navigate, especially when materials synthesis is challenging. Nitrid...
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Metal–oxygen decoordination stabilizes anion redox in Li-rich oxides
Reversible high-voltage redox chemistry is an essential component of many electrochemical technologies, from (electro)catalysts to lithium-ion batteries. Oxygen-anion redox has garnered intense interest for su...
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Compositional and orientational control in metal halide perovskites of reduced dimensionality
Reduced-dimensional metal halide perovskites (RDPs) have attracted significant attention in recent years due to their promising light harvesting and emissive properties. We sought to increase the systematic un...
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High-resolution x-ray analysis of graphene grown on 4H-SiC ( \(000\bar 1\) ) at low pressures
This article explores the growth of graphene under low-pressure Ar conditions. Carbon- and silicon-face 4H-SiC samples are subjected to epitaxial graphene growth at 1600 °C in vacuum, in 1 mbar argon, or in 10...
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A general relationship between disorder, aggregation and charge transport in conjugated polymers
Conjugated polymer chains have many degrees of conformational freedom and interact weakly with each other, resulting in complex microstructures in the solid state. Understanding charge transport in such system...
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Article
Large modulation of carrier transport by grain-boundary molecular packing and microstructure in organic thin films
Solution-processable organic semiconductors are central to develo** viable printed electronics, and performance comparable to that of amorphous silicon has been reported for films grown from soluble semicond...
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Liquid-crystalline semiconducting polymers with high charge-carrier mobility
Organic semiconductors that can be fabricated by simple processing techniques and possess excellent electrical performance, are key requirements in the progress of organic electronics. Both high semiconductor ...
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Article
Highly oriented crystals at the buried interface in polythiophene thin-film transistors
Thin films of polymer semiconductors are being intensively investigated for large-area electronics applications such as light-emitting diodes, photovoltaic cells and thin-film transistors. Understanding the re...
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Article
In Situ X-Ray-Diffraction Studies of Passive Oxide Films
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Article
Structural and Magnetic X-RAY Scattering Measurements of Epitaxial Dy thin Films
We report structural and magnetic X-ray scattering measurements of a 2000Å thick Dy film, sandwiched by LaF3 films on a GaAs(111) substrate. The structure was grow by molecular beam epitaxy with the c-axis of the...
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Article
In Situ X-Ray Scattering of Monolayers Adsorbed at Electrochemical Interfaces.
Surface x-ray scattering has been used to study in-situ the structure of Pb monolayers electrochemically adsorbed on Ag (111) electrodes. Pb forms an incommensurate, hexagonal two-dimensional (2D) solid, which is...
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Article
X-ray depth profiling of iron oxide thin films
A nominally γ-Fe2O3 thin film (oxidized from an Fe3O4 film) has been structurally depth profiled using x-ray scattering in a grazing incidence, asymmetric Bragg geometry. By varying the grazing incidence angle, t...
