Materials Literature
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Unified bandgap engineering, valid both for the armchair and zigzag graphene nanoribbons (GNRs), is enunciated. Using the boundary condition appropriate for K – K ′ points of the Dirac cones, GNRs are shown to exhibit three distinct semiconducting states SC0, SC1, and SC2 with complete absence of metallic state. The e…
A one-dimensional numerical model of a nickel-infiltrated gadolinium-doped ceria (Ni-GDC) electrode is developed to investigate the effect of the microstructural parameters on the electrode performance. The real electrode microstructure information is obtained with focused ion beam tomography and useful microstructura…
High ionic conductivity double-doped bismuth oxide materials were synthesized using solid state and wet chemical methods to achieve lower total doping while maintaining phase stability. The ionic conductivity for DGSB, DWSB, and DCSB at 650°C are measured to be 0.94 S/cm, 0.53 S/cm, and 0.45 S/cm respectively. The nan…
Supramolecular systems were constructed by the non-covalent coupling between PAMAM dendrimers with adamantyl groups and β-cyclodextrin graft PNIPAAm through host-guest interactions. Such supramolecular systems can further self-assemble into nanorods, which have thermoresponsive and excellent fluorescence properties. T…
In this paper, a new 1D constitutive model for shape memory alloy using strain and temperature as control variables is presented. The new formulation is restricted to the 1D stress case and takes into account the martensite reorientation and the asymmetry of the SMA behavior in tension and compression. Numerical imple…
We predict the stability of diamondoids made up of boron and nitrogen instead of carbon atoms. The results are based on quantum-mechanical calculations within density functional theory (DFT) and show some very distinct features compared to the regular carbon-based diamondoids. These features are evaluated with respect…
XAO peptide (Ac-X2A7O2-NH2; X: diaminobutyric acid side chain, -CH2CH2NH3(+); O: ornithine side chain, -CH2CH2CH2NH3(+)) in aqueous solution shows a predominantly polyproline II (PPII) conformation without any detectable α-helix-like conformations. Here we demonstrate by using circular dichroism (CD), ultraviolet reso…
In this study we investigated the synthesis and the hydrogen storage properties of Mg2FeH6. The complex hydride was prepared by ball milling under argon and hydrogen atmosphere from 2Mg + Fe and 2MgH2 + Fe compositions. The samples were characterized by X-ray powder diffraction and scanning electron microcopy. Kinetic…
An electric-pulse-induced reversible resistance change effect in a molecular magnetic tunneling junction, consisting of a single-molecule magnet (SMM) sandwiched in one nonmagnetic and one ferromagnetic electrode, is theoretically investigated. By applying a time-varying bias voltage, the SMM's spin orientation can be…
Gold nanorods with dimensions around 10-100 nm present original optical properties. Their main advantages are the tunability from 600 to 1000 nm of their main absorption band, and its high intensity, stemming from the good conducting properties of gold in this spectral range. Gold nanorods have been applied to trackin…
Creating superhydrophobic surfaces is an important direction for porous materials used in water. We report a novel kind of super-floatable material fabricated from superhydrophobic metal foam as a three-dimensional extension of biologically inspired 1-D and 2-D materials. A simple and widely adaptable method is used t…
ABSTRACT A series of aluminum dimethyl complexes 1–6 bearing N‐[2‐(pyrrolidinyl)benzyl]anilido ligands were synthesized and well characterized. The molecular structure of complex 1 determined by an X‐ray diffraction study indicates the bidentate chelating mode of the pyrrolidinyl‐anilido ligand. In the absence of a co…
Raman spectroscopic measurements of sodium bismuth titanate $({\mathrm{Na}}_{0.5}{\mathrm{Bi}}_{0.5}{\mathrm{TiO}}_{3}$ or NBT) were carried out upon cooling from 1000 to 80 K to study its two phase transitions. Full spectral deconvolution was performed, comparing the results from several fitting models, with a partic…
The adsorption and dissociation of molecular O2 over silver extended surfaces, nanoparticles and clusters of different size, as well as the reaction between adsorbed O2 and H2 to form less nucleophilic hydroperoxide groups have been investigated by means of periodic DFT calculations. Hydroperoxide formation from O2 an…
The kinetics of NOX storage on a lean NOX trap (LNT) were studied using NOX breakthrough curves measured with a laboratory reactor. A much wider range of temperatures (125–450°C) was used than in most studies to facilitate discrimination between potential models. The breakthrough curves were run until the LNT was satu…
A new technique combining in situ X-ray diffraction using synchrotron radiation and infrared thermal imaging is reported. The technique enables the application, generation and measurement of significant thermal gradients, and furthermore allows the direct spatial correlation of thermal and crystallographic measurement…
Abstract Silver nanoparticles (AgNPs) have cytotoxic properties via generation of reactive oxygen species which are involved in the generalized sickness behavior of the host, including fever and lethargy among others. The aim of the present study was to investigate the impact of AgNPs on the ability of rat peripheral…
A new class of blend system comprising weather resistant acrylonitrile/styrene/acrylate (ASA) terpolymer and Zn-ionomer was developed. Based on Zn-ionomer content, the blend system either forms ‘mushroom’ or ‘brush’ type conformation which affected dynamic rheology, DSC, DMA and creep properties differently. Formation…
In this article, two Ni-based cermet electrodes have been fabricated and their electrochemical performances have been evaluated for CO2 electrolysis on solid oxide electrolysis cell (SOEC). It was found that Ni–SDC cermet electrode showed lower cathodic overpotential than Ni–YSZ electrode. The improved cell performanc…
Periodic individual ZnO nanorod arrays were grown on indium tin oxide (ITO) conductive substrates buffered with a ZnO seed layer. Electron beam lithography was used to pattern the pre-coated poly(methyl methacrylate) (PMMA) layer into a periodic aperture template. Because of the constraint effects of this template, th…