Materials Literature
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We investigate theoretically the magnetic levels and optical properties of zigzag- and armchair-edged hexagonal graphene quantum dots (GQDs) utilizing the tight-binding method. A bound edge state at zero energy appears for the zigzag GQDs in the absence of a magnetic field. The magnetic levels of GQDs exhibit a Hofsta…
This article presents a mechanistic study of the photomediated growth of silver nanoprisms. The data show that the photochemical process is driven by silver redox cycles involving reduction of silver cations by citrate on the silver particle surface and oxidative dissolution of small silver particles by O2. Bis(p-sulf…
published
Robust entanglement at room temperature is a necessary requirement for practical applications in quantum technology. We demonstrate the creation of bipartite- and tripartite-entangled quantum states in a small quantum register consisting of individual 13C nuclei in a diamond lattice. Individual nuclear spins are contr…
Titanium dioxide (TiO2) has a number of uses in catalysis, photochemistry, and sensing that are linked to the reducibility of the oxide. Usually, bridging oxygen (Obr) vacancies are assumed to cause the Ti3d defect state in the band gap of rutile TiO2(110). From high-resolution scanning tunneling microscopy and photoe…
Carbon nanofilaments with carbon beads grown on their surfaces were successfully synthesized reproducibly by a floating catalyst CVD method. The nanofilaments hosting the pearl-like structures typically show an average diameter of about 60 nm, which mostly consists of low-ordered graphite layers. The beads with diamet…
Both low-dimensional bar-coded metal oxide layers, which exhibit molecular hinging, and free-standing organic nanostructures can be obtained from unique nanofibers of vanadium oxide (VO(x)). The nanofibers are successfully synthesized by a simple chemical route using an ethanolic solution of vanadium pentoxide xerogel…
Part 1 Advances in apparel design: Measuring and predicting fabric and garment drape Computer aided colour matching of apparel fabric Computer-assisted yarn design Improving apparel sizing and fit Three-dimensional body scanning to improve apparel fit Computer-assisted garment design using three-dimensional body model…
Since sulfur compounds are the major poisons of fuel cell systems, equilibrium concentrations of minor sulfur-based impurities in fuel cell fuels are thermochemically calculated in the temperature range between 400°C and 1000°C. As sulfur-based impurities in fuel cell gases, H2S(g), elementary sulfur, inorganic sulfur…
A model to predict the density of metallic nanostructures (see image) during an electrochemical deposition process is presented. The quantitative consideration of pH gradient inside high-aspect-ratio nanostructures coupled with a kinetic model allows a quantitative prediction of the structure morphology depending on n…
We have investigated the magneto-elastic effect at the antiferromagnetic phase transition in ${\text{LaMnO}}_{3}$ by neutron powder diffraction. The intensity of the (001) magnetic reflection decreases continuously to become zero at ${T}_{N}\ensuremath{\approx}141\text{ }\text{K}$ indicating a second-order antiferroma…
We have developed a theory that unifies the analysis of the modal properties of surface-emitting chirped circular grating lasers. This theory is based on solving the resonance conditions which involve two types of reflectivities of chirped circular gratings. This approach is shown to be in agreement with previous deri…
A hierarchical assembly of carbon nanofibers (CNFs), Pd−Sn nanoparticles, and carbon nanotubes (CNTs) was synthesized based on the template method. The metal particles were first immobilized on the pore walls of an anodic aluminum oxide (AAO) template. The following pyrolysis of C 2 H 2 in the AAO pores simultaneously…
ZnO powders were synthesized in the presence of water-soluble polymers. These polymers have effects on the nucleation and growth of ZnO crystals in solution, resulting in difference in crystalline morphologies. The role of polymers is 2-fold: first, indiscriminating adsorption of Zn(II) ions onto the polymer surfaces,…
We extend the previously established mode-expansion theory to study the eigenmodes of metallic ring systems made by thin wires possessing filmlike rectangular cross sections. Applications of the theory to a single split-ring resonator (SRR) yield essentially the same results with finite-difference-time-domain (FDTD) s…
Mechanical stress generation during epitaxial growth of Fe–Pd thin films on MgO from pulsed laser deposition is a key parameter for the suitability in shape memory applications. By employing in situ substrate curvature measurements, we determine the stress states as a function of film thickness and composition. Depend…
A water-soluble, hydrophilic tripeptide GYE, having sequence identity with the N-terminal segment of amyloid peptides Abeta(9-11), upon self-association exhibits amyloid-like fibrils and significant neurotoxicity towards the Neuro2A cell line. However, the tripeptides GFE and GWE, in which the centrally located tyrosi…
Abstract The frequency upconversion emissions of NaYF 4 nanocrystals embedded in transparent glass ceramics codoped with Yb 3+ /Er 3+ , prepared by melt quenching and subsequent heating, were investigated. It was found that, compared with that of the sample singly doped with 0.5Er 3+ , the intensities of the green and…
Highly fluorescent organic nanoparticles with size of about 300 nm were prepared by nanosecond laser ablation of micrometer-sized powder of dendronized perylenediimide dispersed in water. The nanoparticle colloidal solution provided a fluorescence quantum yield of 0.58. The absorption and emission spectral studies dem…
In a bioinspired methodology, positively charged polypeptides and polyamines directly catalyse ZnO mineralization under "green" conditions of room temperature and neutral pH. The polyamines not only act as mineralizing agents for the formation of ZnO nanoparticles, but also self-assemble the nanoparticles to form spin…