Materials Literature
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A facile, template-free method was used to grow large areas of well-aligned ZnO nanowire arrays on amorphous SiO 2 substrates. The arrays are composed of vertically aligned, single-crystalline, wurtzitic [001] ZnO nanowires whose diameters were easily controlled by growth temperature, adjusted by changing the distance…
Abstract Antimicrobial silver nanoparticles (NPs) were successfully synthesized on the surface of silk fibers via γ‐ray irradiation. The products were characterized with scanning electron microscope (SEM), energy dispersion spectrum, and X‐ray diffraction. The results revealed that the silver particles with a diameter…
The effect of nitrogen on the magnetic properties of C-doped ZnO has been investigated. It has been found that a low concentration of N doping does not lead to an apparent change of the magnetization in C-doped ZnO films. When N doping concentration exceeds 0.05 at. %, the magnetization of C–ZnO films increases signif…
Urchin-like PANI microspheres with an average diameter of 5-10 µm have been successfully prepared. Their surfaces consist of highly oriented nanofibers of ≈30 nm diameter and 1 µm length. The solvent composition plays an important role in the formation process of urchin-like PANI microspheres. The structure of the pro…
Fluorescence resonance energy transfer (FRET) is investigated with manganese-doped ZnSe nanoparticles (quantum dots) as long fluorescence lifetime donors and spiropyran molecules as acceptors. The kinetics of photochemical ring-opening reaction of spiropyran upon UV-illumination is exploited to achieve efficient quenc…
Mn-doped CuCrO2 polycrystalline semiconductors were synthesized by the sol–gel method. The valence state of the Mn ions in the CuCr1−xMnxO2 samples was identified as 3+ by analysing their lattice parameters, their electrical properties and their x-ray photoelectron spectra. The temperature dependence of the susceptibi…
OBJECTIVE: To determine the prevalence of nephrogenic systemic fibrosis (NSF) in patients with chronic kidney disease (CKD) who have received gadopentetate dimeglumine. MATERIALS AND METHODS: We retrospectively studied all patients who underwent contrast-enhanced magnetic resonance imagings (CE-MRIs) between January 1…
A simple general method has been developed for the synthesis of Zr-based multicomponent functional materials with highly ordered mesoporous structure, including pure zirconia, ceria−zirconia solid solutions, yttria-stabilized zirconia, and scandia-stabilized zirconia. Amphiphilic poly(alkylene oxide) block copolymers…
Chimeric enzymes composed of polyhydroxyalkanoate (PHA) synthases from Ralstonia eutropha (Cupriavidus necator) (PhaC(Re)) and Aeromonas caviae (PhaC(Ac)) were constructed. PhaC(Re) is known for its potent enzymatic activity among the characterized PHA synthases. PhaCAc has broad substrate specificity and synthesizes…
Tissue engineered constructs with cells growing in an organized manner have been shown to have improved mechanical properties. This can be especially important when constructing tissues that need to perform under load, such as cardiac and vascular tissue. Enhancement of mechanical properties of tissue engineered vascu…
Thermal degradation of poly(ethylene oxide) (PEO) was studied under vacuum conditions. PEO macromolecules degrade predominantly by random chain scission of a backbone with elimination of oligomer fragments. The reactions include the mechanism of radical termination by disproportionation. The eliminated fragments form…
Differences in the development of carbon structures between coal chars and metallurgical cokes during high-temperature reactions have been investigated using Raman spectroscopy. These differences are important for differentiation between different types of carbons present in the dust recovered from the top gas of the…
A novel adhesion layer is described that enables covalent attachment of cell adherent molecules to the surfaces of poly(ethylene terephthalate) (PET) and poly(aryl-ether-ether-ketone) PEEK. Vapor of zirconium or titanium tetra(tert-butoxides) can be deposited on the surface of PET or PEEK at room temperature at a pres…
Alkyne- and azide-functionalized iron oxide nanoparticles are co-assembled at the water–oil interface and covalently linked using click chemistry under ambient conditions to create magnetic colloidosomes (see image). These colloidosomes possess high stability, size-selective permeability, and are responsive toward ext…
A hierarchical nanosytem combines pH-responsive Pickering emulsion and specific enzymatic reactions (see image). Multiple signals received from the surrounding environment and processed by the integrated nanosystem are used for the direct (without an external computer or energy source) regulating and turning on and of…
We report the high temperature transport and thermoelectric properties of Ca 1− x R x MnO 3 ( R = La, Y and Ce) perovskites in the electron-doped range. The substitution of different valence ions has a similar effect on the thermoelectric properties of this system. Resistivity and thermopower change regularly as the e…
Poly(lactide)-coated paperboards were prepared by a solution coating method, and the effect of coating to improve properties of paperboard used for the manufacturing of 1-way paper cups was tested. Surface of PLA-coated paperboards was smooth and shiny like PE-coated paperboard, and the coating weight and thickness in…
We examined an electromagnetic (EM) theory of surface-enhanced resonance Raman scattering (SERRS) using single Ag nanoaggregates. The SERRS-EM theory is characterized by twofold EM enhancement induced by the coupling of plasmon resonance with both excitation and emission of Raman scattering plus fluorescence. The tota…
OBJECTIVE: Capitalizing on phenomena at the nanoscale may present great benefits to society. Nevertheless, until the hazards and risks of engineered nanoparticles are determined, the technological products and advances of nanotechnology may be impeded by the societal concerns. Although animal data provide the necessar…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCO2-Induced Crystal Phase Transition from Form II to I in Isotactic Poly-1-buteneLei Li, Tao Liu*, Ling Zhao*, and Wei-kang YuanView Author Information State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China* T…