Materials Literature
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A simple approach for the protection of hydrogen storage materials is based on interfacial polymer precipitation induced by solvent evaporation. Sodium borohydride is successfully protected with a polystyrene shell by co-precipitation. This shell provides a hydrophobic barrier for water diffusion into the container in…
Rayleigh scattering and photoluminescence techniques are used to show the evidence of formation of ZnO nanoparticles in gaseous phase due to condensation of laser ablated ZnO plasma species in air. The intensity of Rayleigh scattered signal increases with the increase in time delays between the probe and the ablating…
Luminescence behaviors of Ce 3+ ions in GeS 2 –Ga 2 S 3 –CsCl chalcohalide glasses are reported for the first time. The dependence of Ce 3+ concentration and host composition on absorption and photoluminescence spectra are investigated. Results show that these glasses exhibit broadband emission from 470 to 600 nm unde…
A method based on the study of the statistical characteristics of SERS signals is proposed to identify regimes in which most of the spectra are primarily single-molecule in nature. Once this regime is identified, the signals can be taken (with some statistical confidence) to represent single-molecule spectra and can b…
The intragranular‐porous ferroelectric ceramic was fabricated for the first time with carbon nanotubes as pore formers and the effects of intragranular pores on the ferroelectric and dielectric properties were investigated. It was found that compared with dense ceramic the introduction of a small amount of intragranul…
The effects of polypropylene on the processing of low‐oxygen silicon carbide (SiC) fibers by the polycarbosilane (PCS) route have been studied. Polypropylene acts as a high‐temperature solvent for PCS, reducing the spinning temperature. A small amount of polypropylene (≤5 wt%) significantly improves the spinning abili…
The highly (l00) oriented Pb(Zr0.5Ti0.5)O3 thin films with different Fe3+ doping concentrations were fabricated on LaNiO3-coated silicon substrates by chemical solution deposition. And the microstructure, ferroelectric, leakage, and magnetic properties were investigated. The results indicate that incorporation of Fe3+…
Photochemical reactions of organic molecules in the solid state have an excellent potential in green chemistry technologies as they often proceed in high yields to give a single product without generating volatile organic solvent waste. While recent synthetic applications highlight the need for a better understanding…
The synthesis of solid solutions in the HfB 2 –ZrB 2 system was conducted by mechanically induced self‐sustaining reaction (MSR) processes under an inert atmosphere from elemental mixtures of Hf, Zr, and B. The stoichiometry of the Hf 1− x Zr x B 2 solid solution phase was controlled by adjusting the Hf/Zr/B atomic ra…
The structural and spectroscopic properties of Barium tetraborate crystals activated with Eu 3+ ion have been studied. Differential thermal analysis, X‐ray diffraction (XRD), and SEM techniques have been used for structural characterization. The XRD pattern revealed the formation of α‐BaB 4 O 7 crystals. It was observ…
Abstract Based on the experimental zinc blende and wurtzite structures of CdS nanocrystals, five new CdS clusters (Cd 3 S 3 , (Cd 3 S 3 ) 2 , (Cd 3 S 3 ) 3 , Cd 4 S 4 with C 2V , and Cd 4 S 4 with T D symmetry) are investigated via optimization of their original structures at B3LYP/Lanl2dz theoretical level. Through c…
SrTi1-xCrxO3 (0 <= x <= 0.5) photocatalysts were prepared by using conventional solid state reactions at 1300 degrees C for 5 h and were characterized by using ultraviolet-visible (UV-vis) absorption spectroscopy. SrTi1-xCrxO3 samples not only absorb UV light photons, but also visible light photons due to substi…
Abstract The potential application of laser surface melting (LSM) as a pre‐treatment prior to conventional anodising in sulfuric acid electrolyte has been evaluated. For this purpose, AA2050‐T8 (AlCuLi) and AA2024‐T351 (AlCuMg) aerospace alloys were compared. For LSM, a KrF excimer laser (248 nm) was used, with va…
The authors report negative differential resistance (NDR) characteristics observed in nanodevices constructed using three types of fullerenes (C60, C70, and C84) encapsulated metallic double-walled carbon nanotubes. The NDR behavior persists from room temperature (300 K) to lower temperatures, and a significantly high…
We present strong evidence of Landau states formation in multiwalled carbon nanotubes with metallic or semiconducting outer shells, under magnetic fields as high as 60 T. Magnetoconductance data are found to converge to a gate-independent value for semiconducting shells, whereas for metallic shells, the Landau states…
The crystal structure of the ternary complex of NAD+-dependent formate dehydrogenase from the methylotrophic bacterium Moraxella sp. C-1 with the cofactor (NAD+) and the inhibitor (azide ion) was established at 1.1 A resolution. The complex mimics the structure of the transition state of the enzymatic reaction. The st…
The anomalous wear-out phenomena of Eu-implanted metal-oxide-semiconductor devices were investigated. It will be shown that in contrast to other rare earth elements the electroluminescence (EL) intensity of Eu-implanted SiO2 layers can rise under constant current injection before the known EL quenching will start. Und…
The doping-induced conductivity transitions in molecular layers of polyaniline have been studied by monitoring the correlated optical and spectroscopic changes using spectroscopic and single wavelength extinction ellipsometry, also in total internal reflection mode (TIRE), together with reflection spectrometry. The me…
We present density functional theory (DFT) and time-dependent DFT (TD-DFT) study of the structures and electronic spectra of small CdSe nanocluster-adenine complexes Cd(n)Se(n)-adenine (n = 3, 6, 10, 13). We examine the changes in the geometries and excitation spectra of the nanoclusters induced by DNA base-binding. B…
The interaction between a carbon nanotube (CNT) and a graphene sheet is investigated to describe the contact properties between a CNT atomic force microscope (AFM) tip and a graphite surface. The energy of the whole system is calculated using $\text{MM}+$ molecular mechanical modeling. With the numerical calculations,…