Materials Literature
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The synthesis of a poly (ethylene-co-vinyl alcohol) (EVOH)-based supramolecular polymer by graft functionalization of EVOH with ureidopyrimidinone groups (UPy) has been studied. The resulting polymer, designated as EVOH-U, has been studied from a thermo-reversibility point of view. Generally, UPy, itself, can be self-…
The electron transport properties of the cubic quantum dot, (PbS)32, are investigated. The stability of the quantum dot has been established by recent scanning tunneling microscope experiments [B. Kiran, A. K. Kandalam, R. Rallabandi, P. Koirala, X. Li, X. Tang, Y. Wang, H. Fairbrother, G. Gantefoer, and K. Bowen, J.…
We have measured OH densities by time-resolved broad-band absorption spectroscopy in a He–H2O–O2 dielectric barrier discharge, with the aim to investigate the effect of water and oxygen addition on OH production. The results are examined in the light of literature data, in particular model calculations of reactive oxy…
This investigation analyzes the dependency of minority charge carrier lifetime values at grain boundaries in multicrystalline silicon on the grain boundary type after P gettering and/or firing of SiNx:H layers deposited by plasma enhanced chemical vapor deposition. To get a broad statistics, a new method to determine…
We have performed extensive density matrix renormalization group (DMRG) studies of the Hubbard model on a honeycomb ladder. The band structure (with Hubbard $U=0$) exhibits an unusual quadratic band touching at half-filling, which is associated with a quantum Lifshitz transition from a band insulator to a metal. For o…
In this paper we report a combined calorimetric and inelastic neutron scattering (INS) study of hydrated γ-Al2O3 (γ-alumina) nanoparticles. These complementary techniques have enabled a comprehensive evaluation of the thermodynamic properties of this technological and industrially important metal oxide to be achieved.…
Reversible addition–fragmentation chain transfer (RAFT) dispersion polymerization was utilized to synthesize poly(methacrylic acid)- b -poly(butyl acrylate) (PMAA- b -PBA) amphiphilic block copolymer dispersions in methanol by using the PMAA homopolymer with dithiobenzoate end-group as macro-RAFT agent. And the PMAA m…
Integrated gas combined (power generation) cycle (IGCC) power plants show promise for environmentally benign power generation. In these plants coal and/or biomass are first gasified into syngas, which is then processed in a water gas shift (WGS) reactor to further enhance its hydrogen content for power generation. How…
Intestinal passive Mg(2+) absorption, which is vital for normal Mg(2+) homeostasis, has been shown to be regulated by luminal proton. We aimed to study the regulatory role of intestinal acid sensors in paracellular passive Mg(2+) transport. Omeprazole enhanced the expressions of acid-sensing ion channel 1a (ASIC1a), o…
In this study, native corn starch (NCS) was acetylated by a microwave‐assisted method using vinyl acetate as an acetylating agent and potassium carbonate as a catalyst. Acetylated corn starch (ACS) was characterized by Fourier‐transform infrared spectroscopy, SEM, and XRD. The optimum conditions of acetylation (i.e.,…
We have used high-energy x-ray scattering to map the strain fields around crack tips in fracture specimens of a bulk metallic glass under load at room temperature and below. From the measured strain fields we can calculate the components of the stress tensor as a function of position and determine the size and shape o…
Patterned hydrophobic Ni-P alloy films consisting of orderly and regular micro-nanoscale particles were fabricated through the synergistic effect of electrochemical deposition and chemical deposition. Ni-P alloy films were deposited for different times and characterized by scanning electron microscope (SEM). It was co…
In order to establish the effect of cut tobacco drying on the subsequent pyrolysis and combustion properties, an oven drying method was applied to the treatment of the cut tobacco samples in a temperature range from 70 to 170°C. Thermogravimetric analysis was used to study the weight loss behavior of the dried cut tob…
The production of Ordinary Portland Cement (OPC) causes pollution to the environment, due to the emission of CO2. Geopolymer Concrete,an alternate materialis introduced to replace OPC. Low Calcium Fly ash, a by-product from the coal industry, is widely available in the world. Silicate and Alumina are rich inFly ash.He…
In this study, a kind of unique Fe2O3/Pt hybrid consisting of uniform platinum nanoparticles deposited on a nanoflake-shaped Fe2O3 support was prepared by using a solvothermal reaction followed by a heat-induced reduction process. The prepared Fe2O3 sample displays well-defined nanoflake-like morphology; remarkably, t…
The rotating disk electrode technique was employed to investigate the methanol electrooxidation reaction (MOR) on a polycrystalline Pt surface in acidic medium to elicit quantitative kinetic information and to investigate the MOR reaction mechanism. The Tafel slope was 125 mV/decade, suggesting that the first electron…
Abstract We study the effects of adding a local perturbation in a pattern‐forming system, taking as an example the Ginzburg–Landau equation with a small localized inhomogeneity in two dimensions. Measuring the response through the linearization at a periodic pattern, one finds an unbounded linear operator that is not…
BACKGROUND: Activatable near-infrared fluorescent (NIRF) probes have been used for ex vivo and in vivo detection of intestinal tumors in animal models. We hypothesized that NIRF probes activatable by cathepsins or metalloproteinases will detect and quantify dextran sulphate sodium (DSS)-induced acute colonic inflammat…
An easy-to-implement strategy to introduce carbon nanohorns as interlayers in the photoelectrode of a dye-sensitized solar cell without affecting its overall performance is presented. This provides a clean, easy, and ecofriendly alternative to achieve highly efficient cells.
The study focuses on preparation of thin cerium oxide films with a porous structure prepared by rf magnetron sputtering on a silicon wafer substrate using amorphous carbon (a-C) and nitrogenated amorphous carbon films (CNx) as an interlayer. We show that the structure and morphology of the deposited layers depend on t…