Materials Literature
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Quantum wires with periodic local Rashba spin-orbit couplings are proposed for a higher performance of spin field-effect transistor. Fano-Rashba quantum interference due to the spin-dependent modulated structure gives rise to a broad energy range of vanishingly small transmission. Tuning Rashba spin-orbit couplings ca…
Low-dimensional boundaries between phases and domains in organic thin films are important in charge transport and recombination. Here, fluctuations of interfacial boundaries in an organic thin film, acridine-9-carboxylic acid (ACA) on Ag(111), have been visualized in real time, and measured quantitatively, using Scann…
Semiconductor structures using ferromagnetic semiconductors as spin injectors are promising systems for future spintronic devices. Here, we present combined photoluminescence (PL) and time-resolved magneto-optical experiments of a nominally nonmagnetic quantum well(QW) separated by a thin barrier from a ferromagnetic…
Motivated by the possibility of further improving the thermoelectric properties of skutterudites we investigate charge transfer and bonding in this class of materials using density functional calculations. Results for the CoP3, CoSb3, LaFe4P12 and the hypothetical FeP3 compounds are presented using the procrystal as t…
The charge transport properties of thin films of sol-gel processed undoped and Al-doped zinc oxide nanoparticles with variable doping level between 0.8 and 10 at.% were investigated. The x-ray diffraction studies revealed a decrease of the average crystallite sizes in highly doped samples. We provide estimates of the…
Engineering hierarchical CuO hollow micro/nanostructures was realized by a tyrosine-assisted green strategy. The morphology, composition, and phase structure of as-prepared powders were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), which showe…
The growth of a continuous, uniform Au layer on a dielectric nanoparticle is the critical step in the synthesis of nanoparticles such as nanoshells or nanorice, giving rise to their unique geometry-dependent plasmon resonant properties. Here, we report a novel, streamlined method for Au layer metallization on prepared…
Multiwalled carbon nanotubes (MWNTs) have been introduced into blends of polycarbonate (PC) and poly(styrene-acrylonitrile) (SAN) by melt mixing in a microcompounder. Co-continuous blends are prepared by either pre-compounding low amounts of nanotubes into PC or SAN or by mixing all three components together. Interest…
One consequence of strong spatial confinement of electronic wave functions in semiconductor nanocrystals (NCs) is a significant enhancement in carrier-carrier Coulomb interactions. This effect leads to a number of novel physical phenomena including ultrafast decay of multiple electron-hole pairs (multiexcitons) by Aug…
Selectivity--the production of one molecule out of many other thermodynamically feasible product molecules--is the key concept in developing clean processes that do not produce by-products (green chemistry). Small differences in the potential-energy barriers of single reaction steps control which reaction channel is m…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTBiomimetic Model Systems for Investigating the Amorphous Precursor Pathway and Its Role in BiomineralizationLaurie B. Gower*View Author Information Department of Materials Science & Engineering, University of Florida, 210A Rhines Hall, Gainesville, Florida 32611* To whom corr…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTControlling Mineral Morphologies and Structures in Biological and Synthetic SystemsFiona C. Meldrum*† and Helmut Cölfen*‡View Author Information School of Chemistry, Cantock's Close, University of Bristol, Bristol BS8 1TS, United Kingdom, and Max Planck Institute of Colloids…
In order to contribute to the understanding of the origin of biaxial nematic ordering in tetrapodes, a deuterium NMR study was performed on mixtures of monomers from organosiloxane tetrapodes with a deuterated nematic probe. Contrary to the tetrapode system previously studied, which exhibits a biaxial nematic phase, t…
SurE, the stationary-phase survival protein of Salmonella typhimurium, forms part of a stress survival operon regulated by the stationary-phase RNA polymerase alternative sigma factor. SurE is known to improve bacterial viability during stress conditions. It functions as a phosphatase specific to nucleoside monophosph…
The ferroelectric liquid crystal displays normally suffers from less contrast ratio and vision angle. To produce high optical contrast and colours in FLC displays, Guest-host mode is widely used. Addition of small amount of dichroic dye in pure FLCs results in considerable change in its dielectric and electro-optical…
The well-width dependence of the exciton-phonon interaction in Mg(0.1)Zn(0.9)O /ZnO single quantum wells (QWs) with a wedged structure was investigated by photoluminescence (PL) measurements at 4 K. Within the Frank-Condon approximation, the Huang-Rhys factor S, as a measure of the coupling strength between the excito…
Hybrid palm ash/silica/natural rubber composites were prepared using a laboratory-sized two roll mill. The effects of partial replacement of palm ash by silica on curing characteristics, mechanical properties, and morphology of hybrid palm ash/silica/natural rubber composites were investigated. Compared to the control…
The construction of carbon nanotube field effect transistors (CNT-FETs) can be accomplished by techniques such as spin coating, dielectrophoresis (DEP), and chemical vapor deposition, among which DEP has advantages in terms of the ease of manufacturability and the potential of scalability. In this study, we improved o…
We have studied the influence of geometric confinement imposed on the supramolecular architecture of a discotic model compound confined to self-ordered nanoporous alumina. We systematically varied the pore diameter and the chemical nature of the pore walls and studied the systems thus obtained by means of wide angle X…
We present the microscopic properties of superconducting state in ${\text{Mo}}_{3}{\text{Sb}}_{7}$ $({T}_{c}=2.2\text{ }\text{K})$ using muon-spin rotation measurements. The zero-field-cooled and field-cooled (FC) data with an applied transverse field of 40 mT reveal an irreversibility in the muon relaxation rates and…