Materials Literature
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Three-dimensional (3D) structures such as nanowires, nanotubes, and nanorods have the potential to increase surface area, reduce light reflection, and shorten charge carrier transport distances. The assembly of such structures thus holds great promise for enhancing photoelectrochemical solar cell efficiency. In this s…
We report a novel continuous-flow hydrothermal method for the synthesis of layered double hydroxide (LDH) nanoplates. The precursor solutions may be fed to the reactor so that the production of LDHs occurs in a continuous mode. By control of the synthesis temperature, pressure and contact time, the synthesis of LDH na…
The limitations of graphene as an effective corrosion-inhibiting coating on metal surfaces, here exemplified by the hex-reconstructed Pt(100) surface, are probed by scanning tunneling microscopy measurements and density functional theory calculations. While exposure of small molecules directly onto the Pt(100) surface…
Biaxially textured epitaxial thin-film heterostructures of ceria and 8 mol % yttria-stabilized zirconia (8YSZ) were grown using pulsed laser deposition (PLD) with the aim to unravel the effect of the interfacial conductivity on the charge transport properties. Five different samples were fabricated, keeping the total…
The regulation of recognition events in nature via dynamic and reversible self-assembly of building blocks has inspired the emergence of supramolecular architectures with similar biological activity. Synthetic molecules of diverse geometries self-assemble in water to target biological systems for applications ranging…
We show that rhombohedral graphite may support surface superconductivity with an unusual relation between the BCS coupling constant and the order parameter. This feature results from the properties of the states localized on the graphite surfaces. In a description including only the nearest neighbour coupling of the g…
We have designed a system to study microwave assisted domain wall nucleation in permalloy nanowires. We find a substantial decrease in the nucleation field when microwave fields are applied, in comparison to pulse fields. A clear resonance peak is observed in the frequency dependence of the nucleation field, which coi…
We introduce the acoustic equivalent of 'supercoupling' by studying the anomalous sound transmission and uniform energy squeezing through ultranarrow acoustic channels filled with zero-density metamaterials. We propose their realization by inserting transverse membranes with a subwavelength period along the channel, a…
We present a combined experimental and theoretical approach for the determination of the low-temperature valence band offset (VBO) at CdSe/ZnTe heterojunctions with underlying zincblende crystal structure. On the experimental side, the optical transition of the type II interface allows for a precise measurement of the…
A colorimetric logic gate based on free gold nanoparticles is presented with melamine and Hg(2+), as well as its colorimetric detection of Hg(2+) with good selectivity and sensitivity.
Lithium ion capacitors (LICs) have recently drawn considerable attention because they utilize the advantages of supercapacitors (high power) and lithium ion batteries (high energy). However, the energy densities of conventional LICs, which consist of a pair of graphite and activated carbon electrodes, are limited by t…
Our series of articles is devoted to high-precision molecular dynamics simulation of mixed actinide-oxide (MOX) fuel in the approximation of rigid ions and pair interactions (RIPI) using high-performance graphics processors (GPU). In this article we study self-diffusion mechanisms of oxygen anions in uranium dioxide (…
High Resolution Image Download MS PowerPoint Slide Solid form screening is an integral part of many development plans at various companies and includes polymorph, salt, cocrystal, amorphous, and amorphous dispersion screens. There are a number of traditional solvent- and nonsolvent-based methods that are employed for…
Hollow fusiform RuO2·xH2O nanostructures were prepared by using α-Fe2O3 nanospindles as a sacrificial template via a hydrothermal approach and have demonstrated good energy storage capability in pseudocapacitors with high-rate performance and excellent cycling stability.
In this Thesis, a study of the electronic structure of two Ti-based oxide systems, TiO2 thin films and the ultra-thin LaAlO3-SrTiO3 (LAO-STO) heterojunctions, is given. A weak room-temperature ferromagnetism (FM) has been detected in slightly reduced TiO2 thin film and in other oxides; as these materials are insulatin…
Metastable vaterite crystals were synthesized by increasing the pH and consequently the saturation states of Ca and CO3 containing solutions using an ammonia diffusion method. SEM and TEM analyses indicate that vaterite grains produced by this method are polycrystalline aggregates with a final morphology that has a si…
A series of NiO/CeO2 catalysts were prepared by using the combustion method and characterized by using XRD, N2-physisorption, TEM, UV-visible, Raman, XPS, ICP-OES and H2-TPR. Typical results indicated the NiO/CeO2 had a better performance than CeO2 for CO oxidation and 15 wt% NiO/CeO2 is active and stable, whereas cat…
Motivated by the need to understand environmental risks posed by potentially biocidal engineered nanoparticles, the effects of silver nanoparticle (AgNP) exposure on viability in single species Pseudomonas fluorescens biofilms were determined via dye staining methods. AgNP dispersions, containing both particles and di…
The development of high-performance electrochemical energy storage and conversion devices, including supercapacitors, lithium-ion batteries, and fuel cells, is an important step on the road to alternative energy technologies. Carbon-containing nanomaterials (CCNMs), defined here as pure carbon materials and carbon/met…
An all-solid-state and integrated device in which photoelectric conversion and energy storage are simultaneously realized has been developed from free-standing and aligned carbon nanotube films or carbon nanotube–polyaniline composite films. Due to the aligned structure and excellent electronic property of the film el…