Materials Literature
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Thin mesoporous films of ZnO were prepared by electrochemical deposition using eosin Y as a structure-directing agent. After removal of the eosin from the structure, transparent porous ZnO films were obtained. The porosity and surface area of these films were determined by performing krypton BET measurements. Electroc…
Measurements of the core and ligand monolayer compositions of small gold nanoparticles (NPs) using electrospray ionization (ESI) mass spectrometry were performed by incorporating ionization tags, methoxy penta(ethylene glycol) thiolate ligands (-S-PEG), into the ligand monolayers via ligand exchange. During ESI, alkal…
A simple synthesis for highly ordered mesoporous Ce 1 - x Zr x O 2 solid solutions with various Ce/Zr ratios is achieved. Structural characterization with small-angle and wide-angle PXRD, vis−Raman spectra, and TEM methods reveals that the Ce 1 - x Zr x O 2 have a 2D hexagonal mesostructure with crystalline walls. The…
Resonant nonradiative energy transfer between close-packed PbS quantum dots is observed in continuous-wave and time-resolved fluorescence experiments. Samples of nominally a single dot size, and two dot sizes, were investigated. In both cases, the time-integrated fluorescence exhibits a substantial redshift compared t…
ZnO has received considerable attention because of its unique optical, piezoelectric, and magnetic properties. It also readily self-assembles into a family of nanocrystalline structures. We review the current status of research into ZnO tetrapod nanocrystals. These crystals consist of a ZnO core in the zinc blende str…
Materials for electromagnetic shielding are increasingly needed to protect electronic devices from interference problems and to avoid dangerous effects on human health due to electromagnetic radiation. Several shielding applications require solutions that textiles can suitably fulfill. Here the electromagnetic interfe…
The procedure has been developed for extracting homocharge and heterocharge currents from experimentally measured thermally stimulated depolarization currents of corona poled PVDF. Application of different depolarization modes supplemented with the isothermal currents allowed to obtain such parameters of relaxation pr…
A model describing the influence of torsion stress on the giant magnetoimpedance in amorphous wires with negative magnetostriction is proposed. The wire impedance is found by means of the solution of Maxwell equations together with the Landau-Lifshitz equation, assuming a simplified spatial distribution of the magneto…
From a detailed analysis of InN epilayers deposited in a close-coupled showerhead metalorganic vapour phase epitaxy (MOVPE) system under various conditions we investigate the effect of growth parameters on the lattice constants of the InN layer. The layers are under significant internal hydrostatic stress which influe…
Four modifications of the corona triode are described for charging polar polymers with ferroelectric or non-linear optical properties. Advantages of the constant current modification of corona poling are illustrated and discussed.
A novel class of 2-(2'-hydroxyphenyl)benzothiazole-based (HBT-based) excited-state intramolecular proton-transfer (ESIPT) compounds, N,N'-di[3-Hydroxy-4-(2'-benzothiazole)phenyl]isophthalic amide (DHIA) and N,N'-di[3-Hydroxy-4-(2'-benzothiazole)phenyl]5-tert-butyl-isophthalic amide (DHBIA) has been feasibly synthesize…
The application of diamond like carbon (DLC) coatings in tribological applications, the range of deposition methods employed and techniques for characterising the structure and properties of the films produced are reviewed. Thus far, DLC coatings have found broad industrial application, particularly in optical and ele…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilicon-Based Low-Dimensional Nanomaterials and NanodevicesBoon K. Teo and X. H. SunView Author Information Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, and Department of Chemistry, University of Western Ontario, London, Ontario, Canad…
The primary route to hydrogen production from fossil fuels involves the water-gas shift (WGS) reaction, and an improvement in the efficiency of WGS catalysts could therefore lead to a major leap forward in the realization of hydrogen economy. On the basis of a combination of high-resolution scanning tunneling microsco…
Rheological measurements are used to compare clay nanocomposites prepared through melt mixing using two different polypropylene matrices. Steady state and transient nonlinear rheological experiments are employed to separate the contributions of flow induced orientation of the tactoids and particulate network build-up.…
Two new isomeric photochromic diarylethenes with a pyrrole unit have been developed. Their properties, including photochromic behavior, crystal structures, and fluorescent properties, have been investigated. The two isomeric compounds show distinctly different photochromism, both in solution and in the single-crystall…
A low power PRAM using a data-comparison write (DCW) scheme is proposed. The PRAM consumes large write power because large write currents are required during long time. At first, the DCW scheme reads a stored data during write operation. And then, it writes an input data only when the input and stored data are differe…
We report the fabrication and extensive characterization of solid polymer electrolyte-gated organic field-effect transistors (PEG-FETs) in which a polyethylene oxide (PEO) film containing a dissolved Li salt is used to modulate the hole conductivity of a polymer semiconductor. The large capacitance (approximately 10 m…
Peptide-coated quantum dot-photosensitizer conjugates were developed using novel covalent conjugation strategies on peptides which overcoat quantum dots (QDs). Rose bengal and chlorin e6, photosensitizers (PSs) that generate singlet oxygen in high yield, were covalently attached to phytochelatin-related peptides. The…
Apatite fission-track length data are used extensively for thermal history inversion. However, several studies have documented instances of poor reproducibility of length data. We address this problem by using c-axis projection to normalize track lengths for crystallographic angle in the extensive laboratory annealing…