Materials Literature
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In this paper we present a vector hysteron model, which is a generalization in three dimensions of the classical scalar Preisach model and an extension to the radial vector model previously published. We show that the vector model satisfies the second principle of thermodynamics. In addition the properties of the vect…
Nominal composition Sr 8 Al x Ga 16- x Si 30 (0≤ x ≤16) samples were prepared by powder metallurgy. The samples with x =0–7 exhibited the type-I clathrate structure ( P m 3 n , No. 223), while the samples with x =8–13 almost exhibited the type-VIII clathrate structure ( I 43 m , No. 217). These samples possessed the e…
In this paper, we provide a framework for the description of the basic transport processes in ensembles of disordered semiconductor quantum dots by studying solid systems of Si nanocrystallites embedded in an insulating matrix. Our combined structural, transport, charge storage, and optical studies enable us to evalua…
We report a liquid crystal (LC) lens with a large aperture but low driving voltages with a thin layer of weakly conductive material. The effect of the conductive layer is demonstrated. A LC lens is realized with a diameter as large as 15 mm and with driving voltages as low as 11 V(rms.) The properties of the LC lens a…
The effect of cadmium chloride (CdCl 2 ) on the phase behavior of polystyrene- block -poly(4-vinylpyridine) copolymer (S4VP) was investigated by using rheometry, small-angle X-ray scattering, and transmission electron microscopy. For this purpose, symmetric S4VPs with various molecular weights were prepared by anionic…
Abstract Poly[2‐(dimethylamino) ethyl methacrylate] (PDMAEMA) brushes on the surfaces of clay layers were prepared by in situ free‐radical polymerization. Poly (methyl methacrylate) (PMMA) colloid particles stabilized and initiated by clay layers with PDMAEMA polymer brushes were prepared by Pickering emulsion polymer…
We examine the ordering of hard rods on the surface of a sphere using computer simulations. As predicted by previous theories of thin nematic shells we observe four s = + 1/2 defects. However, the predicted tetrahedral symmetry for the defects and the "baseball" director configuration is not observed. Instead the four…
Patterned micro- and nanostructured surfaces have received increasing attention because of their ability to tune the hydrophobicity and hydrophilicity of their surfaces. However, the mechanical properties of these studied surfaces are not sufficiently robust for load-bearing applications. Here we report transparent na…
Density profiles are the most common measure of inhomogeneous structure in confined fluids, but their connection to transport coefficients is poorly understood. We explore via simulation how tuning particle-wall interactions to flatten or enhance the particle layering of a model confined fluid impacts its self-diffusi…
Nanosized gel particles (nanogels) are of interest for a variety of applications, including drug delivery and single-molecule encapsulation. Here, we employ the cores of nanoscale liposomes as reaction vessels to template the assembly of calcium alginate nanogels. For our experiments, a liposome formulation with a hig…
In the present study, we have investigated the growth of a multilayer formed by poly(sodium 4-styrene sulfonate) (PSSS) and poly(diallyldimethylammonium chloride) (PDDA) at different salt concentrations by use of quartz crystal microbalance with dissipation (QCM-D). The frequency change (Deltaf) demonstrates that the…
An efficient means to obtain light emission from a silicon-based material would enable integrating both optical and electronic functionalities on the same silicon chips. The long radiative lifetimes have until recently obstructed efficient light emission from Si. A nanocrystalline approach has opened up a prospect for…
Abstract Diverse chemical functionalization of the inner and outer surfaces of the nanotubes enables us to sense and visualize the encapsulation and transport behavior of biomacromolecular guests. The event occurs specifically in attoliter volume nanospace inside the hollow cylinder of the nanotubes. Comparison of the…
We have developed a low-cost and effective method to align single-walled carbon nanotubes (SWNTs) using a series of diamond wire drawing dies. The obtained SWNTs are highly dense and perfectly aligned. X-ray diffraction (XRD) indicates that the highly dense and perfectly aligned SWNTs (HDPA-SWNTs) form a two-dimension…
We report on the narrowest "free" quantum rods of PbS with 1.7 nm diameter produced in a single step under bench-top reaction conditions. The nanorods exhibit molecule-like discrete narrow optical behavior with high fluorescence quantum yield. We propose a new macroscopic vortex assembly formation by simple spin casti…
Following a multistep procedure, the copper(I)-templated strategy allowed preparation of a multifunctional [3]rotaxane. The dumbbell consists of a central two-bidentate chelate unit and two terminal stoppers. The two rings threaded on the rotaxane axis consist each of a 1,10-phenanthroline-incorporating macrocycle, ri…
The spectral properties of two spherical metallic nanoparticles of 80 nm in diameter are examined with regard to the interparticle distance and relative polarization of the excitation light. One Au nanoparticle is attached to a scanning fiber probe and the second to a scanning substrate. This configuration allows thre…
Self-assembly of citrate-stabilized gold nanoparticles (AuNPs) onto an optically transparent indium tin oxide (ITO) surface followed by neutralization of these particles using dodecanethiol as a surfactant have been demonstrated. X-ray photoelectron spectroscopic (XPS) studies revealed the partial removal of citrate i…
We developed molecular models describing the thermally initiated motion of nanocars, nanosized vehicles composed of two to four spherical fullerene wheels chemically coupled to a planar chassis, on a metal surface. The simulations were aimed at reproducing qualitative features of the experimentally observed migration…
Using a surface acoustic wave based high resolution gravimetric technique where samples close to a monolayer are measured we observe high weight percentage hydrogen (${\mathrm{H}}_{2}$) uptake with rapid kinetics at room temperature in transition metal (TM) ethylene (${\mathrm{C}}_{2}{\mathrm{H}}_{4}$) complexes forme…