Materials Literature
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The surface of ZnO nanocrystals was engineered by the creation of an MgO shell layer that prevents the particle aggregation and improves the luminescent properties. The ZnO core with a diameter of ∼3.0 nm and ∼0.3 nm thick MgO-passivated ZnO nanocrystals were prepared at 0 °C using the reaction between Zn(CH 3 COO) 2…
The primary purpose of this study was to comprehensively delineate specificity of the peptide spacer sequence to tumor-expressed proteases for the design of macromolecular carrier-peptide spacer-drug conjugate system. 225 conjugates of carboxymethyldextran polyalcohol (CM-Dex-PA) as water-soluble carrier and a dansyl…
We have studied the reflectance of the recently discovered superconductor ${\mathrm{LaO}}_{0.9}{\mathrm{F}}_{0.1}\mathrm{FeAs}$ in a wide energy range from the far infrared to the visible regime. We report on the observation of infrared active phonons, the plasma edge, and possible interband transitions. On the basis…
Oxygen transport membranes (OTMs) made of mixed oxygen ionelectron conductors can generate significant amounts of hydrogen and oxygen via water splitting at moderate temperatures (500- 900{degree sign}C). Hydrogen production by this method is nongalvanic, and the separated hydrogen is of high purity. This study focuse…
Porous Cu2O microcubes have been successfully synthesized via an in situ ultrasound route at an ultrasound power of 90% for 3 h in the presence of polyvinylpyrrolidone (PVP), employing CuCl2·2H2O, C6H12O6·H2O, trisodium citrate and NaOH as starting reactants. The phase and morphology of the product were characterized…
Frequency response function (FRF) showing ac gain from a single-walled carbon nanotube transistor is presented. A top-gated carbon nanotube FET (CNFET) is configured as a common-source amplifier and the FRF of the amplifier is measured. Evidence of unambiguous signal amplification is observed in time domain as well as…
We have studied the mechanical properties of ethylene vinyl acetate (EVA) and cellulose acetate (CA) composite containing cellulosic natural fibers (Sterculia villosa) and tried to explain with the help of mixing of fiber in the composite. It is observed that the tensile strength (TS) of EVA composite decreases with t…
The electrical properties of silicon-rich oxide (SRO) films in metal-oxide-semiconductor-like structures were analysed by current versus voltage (I-V) and capacitance versus voltage (C-V) techniques. SRO films were thermally annealed to activate the agglomeration of the silicon excess in the form of nanoparticles (Si-…
The needle morphology of the commercial blue pigments copper phthalocyanine and metal-free phthalocyanine is studied using computer simulations and is compared with vapor grown crystals. Both phthalocyanines grow from the vapor at 700 K as very thin needles. The crystals are faceted along the needle axis, having one b…
We investigate the influence of sintering temperature and annealing conditions on the transport properties of La 0.67 Ca 0.33 MnO 3 (LCMO) samples prepared by the solid-state reaction method. In the plot of resistance as a function of temperature, R ( T ), we observe two peaks for air-annealed samples, which is attrib…
Hematin, a hydroxyferriprotoporphyrin, is the more stable oxidized form of the free heme. The use of hematin as a catalyst for oxidative polymerization reactions has been restricted due to its limited aqueous solubility at low pH conditions. While there have been reports on the functionalization of hematin with poly (…
Surfactant-assisted infiltration of Gd-doped ceria (CGO) in Nb-doped SrTiO3 (STN) was investigated as a potential fuel electrode for solid oxide fuel cells (SOFC). An electronically conductive backbone structure of STN was first fabricated at high temperatures and then combined with the mixed conducting and electroche…
The aim of this study was to evaluate the behaviors of mesenchymal stem cells (MSCs) on Poly(L-Lactic acid) (PLLA) membranes with different surface topographies. The double-sided micropatterns, island-patterned, and sunken-patterned PLLA membranes with diameters of 60 and 100 microm, were fabricated by the soft lithog…
Our objectives were to fabricate three-dimensional collagen/chondroitin sulfate beads using mild conditions and no chemical reagents, and subsequently to investigate the influence of the nanotopography of these beads on primary osteoblast and MG63 cell responses, including cell morphology, proliferation rate, and gene…
Density functional theory is employed to investigate the interactions between a nine-atom cobalt cluster and single-wall carbon nanotube caps with chiral angles ranging from near zigzag to armchair. With the aim of analyzing the initial stages of nanotube growth, the caps used in our study are the minimal units for wh…
The Langmuir monolayer is widely regarded as a model for investigating biomineralization on biological membranes, but so far the crystallization process has been elusive. In this work, we study the crystallization process of CaCO(3) on a stearic acid monolayer at the air-water interface by in situ Brewster angle micro…
Double agent: Homogeneous MnxFe1–xO colloidal solid-solution nanocrystals exhibit stability despite having a metastable structure. They show simultaneous T1 and T2 relaxation time contrast enhancement effects in magnetic resonance imaging (see images of rat liver).
We investigated the effect of the substrate temperature on the magnetic, electrical and optical properties of nitrogen-doped ZnO thin films. Experiments showed that a high substrate temperature depresses the deposition rate and produces much thinner films displaying more robust ferromagnetism. In addition, the resisti…
Abstract BACKROUND: One of the most important properties of the azobenzene chromophores is the photochemical trans – cis isomerization induced by UV or visible light. In azopolymers, the photoisomerization induces conformational changes in the polymer chains, which in turn lead to macroscopic variations in the chemica…
Selective epoxidation of alkenes is possible with a new manganese porphyrin catalyst, C(PMR), that uses hydrogen bonding between the carboxylic acid on the substrate molecule and a Kemp's triacid unit. For two out of three olefin substrates employed, molecular recognition prevents the unselective oxidation of C-H bond…