Materials Literature
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We have investigated cobaltite relatives of the layered perovskite cuprates and nickelates, ${\text{Pr}}_{2\ensuremath{-}x}{\text{Ca}}_{x}{\text{CoO}}_{4}$ $(0.39\ensuremath{\le}x\ensuremath{\le}0.73)$ and ${\text{La}}_{2\ensuremath{-}x}{\text{Sr}}_{x}{\text{CoO}}_{4}$ $(x=0.4,0.61)$, using elastic neutron scattering.…
The use of qubits as sensitive magnetometers has been studied theoretically and recent demonstrated experimentally. In this paper we propose a generalisation of this concept, where a scanning two-state quantum system is used to probe the subtle effects of decoherence (as well as its surrounding electromagnetic environ…
Drilling holes in a bulk high-Tc superconductor enhances the oxygen annealing and the heat exchange with the cooling liquid. However, drilling holes also reduces the amount of magnetic flux that can be trapped in the sample. In this paper, we use the Bean model to study the magnetization and the current line distribut…
PLGA-grafted HA copolymers were synthesized and utilized as target specific micelle carriers for DOX. For grafting hydrophobic PLGA chains onto the backbone of hydrophilic HA, HA was solubilized in an anhydrous DMSO by nano-complexing with dimethoxy-PEG. The carboxylic groups of HA were chemically grafted with PLGA, p…
Two novel subphthalocyanines substituted axially with a BODIPY or distyryl BODIPY moiety have been synthesized. Both systems exhibit a highly efficient photoinduced energy transfer process, either from the excited BODIPY to the subphthalocyanine core (for the former) or from the excited subphthalocyanine to the distyr…
Iron oxide nanoparticles (IONPs) are important tools for nanobiotechnology applications. However, aqueous instability and non-specific biodistribution problems limit the applications of IONPs. Considering this, α-phosphonic acid, ω-dithiopyridine functionalized polymers were synthesized via the reversible addition–fra…
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…
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…