Materials Literature
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Texture development in alumina that contains calcia and silica and has been templated with platelet‐shaped α‐Al 2 O 3 particles has been evaluated. The texture fraction is shown to be related directly to template growth. Texture quality is controlled by the template concentration, decreasing at template concentrations…
Concomitant chemotherapy and radiotherapy (CCRT) has recently been shown to improve treatment outcome in a range of solid tumors. Pegylated liposomes have the potential to target drugs directly to tumors and may increase the efficacy and reduce the toxicity of CCRT by selectively delivering radiosensitizing agents to…
We study aperiodic systems based on substitution rules by means of a transfer-matrix approach. In addition to the well-known trace map, we investigate the so-called ``antitrace'' map, which is the corresponding map for the difference of the off-diagonal elements of the $2\ifmmode\times\else\texttimes\fi{}2$ transfer m…
The formation of corrosion products was followed during the atmospheric corrosion of open and confined zinc surfaces exposed to periodic wet and dry conditions. The periodic wet and dry exposure consisted of the immersion of samples in sodium chloride (NaCl) solutions followed by exposure to laboratory air for differe…
The construction of 32 scaffolds at the periphery of a fifth generation poly(propyleneimine) dendrimer, in which glycinylurea-modified molecules can be selectively bound, represents a novel approach to functionalize dendrimers (see schematic representation). These supramolecular architectures have enhanced rigidity an…
Effects of the electron doping on the magnetic and electronic properties have been investigated in the conducting double perovskite ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6}.$ Judging from the enhanced moment ${\ensuremath{\mu}}_{\mathrm{Mo}}$ at the Mo site, the doped electrons are considered to occupy mainly the down-s…
Photoelectrochemistry (PEC), glancing angle x-ray diffraction (GAXRD), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PDP) in synthetic salt water were utilized to investigate the nature of different oxides formed on titanium by thermal oxidizing, polishing, acid-etching, and anodizing…
We demonstrate that ultrafast pump–probe reflectivity measurements from bulk Si samples using a Ti:sapphire femtosecond oscillator (λ=800 nm) can be used to measure the Si surface recombination velocity. The technique is sensitive to recombination velocities greater than ∼104 cm s−1.
The characterization of Si‐B‐C‐N amorphous ceramics using isothermal compression creep testing in the temperature range of 1200°–1500°C is reported. The deformation rate contains a stress‐dependent component that is proportional to the applied stress, which indicates that this portion of the deformation mechanism is b…
The time evolution of changes in the optical absorption coefficient with illumination has been studied for $a{\ensuremath{-}\mathrm{A}\mathrm{s}}_{2}{\mathrm{S}}_{3}$ films at 50, 100, 200, and 300 K in order to characterize the dynamics of photodarkening. The magnitude of the changes is larger at the lower temperatur…
Synopsis A new method for the in vivo characterization of the physical properties of skin is presented. This comprises an ultrasound device to measure the vertical displacement of the surface of the skin, as well as its thickness and that of the hypodermis under suction. In combination with this, a mathematical model…
ADVERTISEMENT RETURN TO ISSUEPREVFeaturesNEXTPeer Reviewed: Molecular Beacons: Novel Fluorescent ProbesThese sensitive fluorescent DNA probes can be used for real-time biomolecular recognition of unseparated target species.Xiaohong Fang, Jianwei Jeffery Li, John Perlette, Weihong Tan, and Kemin WangCite this: Anal. Ch…
The effects of Ti doping on the Mn site in the colossal magnetoresistant (CMR) material of ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ has been studied by preparing the series ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{Mn}}_{1\ensuremath{-}y}{\mathrm{Ti}}_{y}{\mathrm{O}}_{3}$ $(y=0,$ 0.01, 0.03, 0.…
Abstract In this paper, we derive the isothermal mechanical response of a 4‐element rheological model for shape memory polymers (SMP) in the context of (i) constant stress, (ii) constant strain, (iii) constant stress rate, (iv) constant strain rate, (v) periodic strain. The effect of shape memory strain (modeled by a…
The resistive upper critical field along the b axis ${(H}_{c2}\ensuremath{\parallel}b)$ in ${(\mathrm{TMTSF})}_{2}{\mathrm{PF}}_{6}$ is investigated in detail in fields to 17.5 T and temperatures to ${T/T}_{c}\ensuremath{\sim}\frac{1}{60},$ at various pressures near the border between spin-density wave and metallic st…
By in situ grafting methacroyloxy functionalized silanes on commercial nanoglobular silica polymerization-active silico-organic nanoparticles were prepared. In radiation (UV, EB) induced polymerization reactions these modified nanoparticles form covalent crosslinks to acrylate substrates, thus efficiently modifying th…
Mesoscale disordered materials are ubiquitous in industry and in the environment. Any fundamental understanding of the transport and mechanical properties of such materials must follow from a thorough understanding of their structure. However, in the overwhelming majority of cases, experimental characterization of suc…
Silks are highly expressed, secreted proteins that represent a substantial metabolic cost to the insects and spiders that produce them. Female spiders in the superfamily Araneoidea (the orb-spinning spiders and their close relatives) spin six different kinds of silk (three fibroins and three fibrous protein glues) tha…
The transfer of electrons from one material to another is usually described in terms of energy conservation, with no attention being paid to momentum conservation. Here we present results on the junction resistance between a carbon nanotube and a graphite substrate and show that details of momentum conservation also c…
We have introduced a photoexcitation contribution in the dynamical model we previously presented (see previous paper), as an additional term in the rate transition, in order to reproduce the light induced thermal hysteresis effect, experimentally observed in the spin-crossover materials. The set of motion equations go…