Materials Literature
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<div class="section abstract"><div class="htmlview paragraph">Lean NOx Trap (LNT) catalysts can effectively reduce NOx from lean engine exhaust. Significant research for LNTs in diesel engine applications has been performed and has led to commercialization of the technology. For lean gasoline engine applic…
Porphyrins are widely used as dye molecules in solar cells. Knowing the energies of their frontier orbitals is crucial for optimizing the energy level structure of solar cells. We use near edge x-ray absorption fine structure (NEXAFS) spectroscopy to obtain the energy of the lowest unoccupied molecular orbital (LUMO)…
Quantitative X-ray microanalysis of thick samples is usually performed by measuring the characteristic X-ray intensities of each element in a sample and in corresponding standards. The ratio of the measured intensities from the unknown material to that from the standard is related to the concentration using the ZAF or…
Positively charged impurities were introduced into a bilayer graphene (BLG) transistor by n -doping with dimethylformamide. Subsequent exposure of the BLG device to moisture resulted in a positive shift of the Dirac point and an increase of hole mobility, suggesting that moisture could reduce the scattering strength o…
Abstract A reactive polymer brush containing alkoxyamine units in the side chains, when heated with an alkoxyamine-terminated fluorinated nongrafted polymer, gave a grafted copolymer brush by a radical crossover reaction of alkoxyamine units. The fluorinated grafted copolymer brush could be converted back to the paren…
Abstract The general method of doping metals with organic, bio‐organic, and polymeric dopants is extended to inorganic dopants. Specifically, the heteropolyacids H 3 [P(M 3 O 10 ) 4 ] (PMA; M=Mo, W) were successfully entrapped within a metallic silver matrix. The obtained PMA@Ag composites were fully characterized by…
The (6-4) photoproduct ((6-4) PP) is one of the main lesions in UV-induced DNA damage. The (6-4) PP and its valence isomer Dewar photoproduct (Dewar PP) can have a great threat of mutation and cancer but gained much less attention to date. In this study, with density functional theory (DFT) and the complete active spa…
Abstract The luminescence spectra of B 4.3 C, B 6.5 C and B 10 C boron carbide with different isotope enrichments ( 10 B, 11 B, 12 C, 13 C) yield electron transition energies from gap states into the valence band and between localized levels in the gap with 0.25 meV resolution. The results well agree with the actual b…
Lithium amidoborane−ammonia borane (LiNH 2 BH 3 ·NH 3 BH 3, LiAB·AB for short) was synthesized recently. Compared with lithium amidoborane (LiNH 2 BH 3, LiAB for short) and ammonia borane (NH 3 BH 3, AB for short), this new ammonia borane derivative has better dehydrogenation kinetics and releases 14.8 wt % hydrogen w…
A continuum model is developed for describing deformation and failure mechanisms in crystalline solids (ceramics and minerals) with the cubic spinel structure. The constitutive model describes the response under conditions pertinent to impact loading: high pressures, high strain rates, and, possibly, high temperatures…
A novel radical gold dithiolene complex exhibits a hexagonal columnar mesophase, as confirmed by optical microscopy, DSC analysis and X-ray diffraction. The extent of delocalization of the spin density in such a complex was analyzed by EPR. Temperature dependent magnetization measurements reveal that the global magnet…
Abstract Monodisperse, uniform, encapsulated mesoporous silicananocomposites with a LaF 3 :Yb,Er core and a mesoporous silica shell structure, which still exhibit green upconversion photoluminescence (PL) under 980 nm irradiation, have been successfully synthesized and investigated as potential drug delivery systems b…
This paper extends the area of application of the Fourier modal method (FMM) from periodic structures to aperiodic ones, in particular for plane-wave illumination at arbitrary angles. This is achieved by placing perfectly matched layers at the lateral sides of the computational domain and reformulating the governing e…
The present study reveals the potential of magnetic nanoparticles based on the La0.75Sr0.25MnO3 perovskite manganite for magnetic resonance imaging (MRI). Moreover, it describes the development of the dual imaging probe where the magnetic cores are combined with a fluorescent moiety while the improved colloidal stabil…
A comprehensive analytical framework is developed for the study of magnetostrictive transducers with arbitrary geometries operated in dynamic regimes. Weak form equations are derived from Maxwell's equations and linear momentum without restricting the form of the constitutive behavior of the magnetostrictive material.…
A two-phase method is exploited to prepare many kinds of nearly monodisperse, highly crystalline, size- and shape-controlled, surface-property-tunable inorganic nanocrystals, such as metal, semiconducting, magnetic, dielectric, and rare earth nanocrystals. The reaction of the two-phase system happens at the interface…
Abstract Mixed ZnO‐ZrO 2 films have been obtained by sol‐gel technology. By using spin coating method, the films were deposited on Si and glass substrates. The influence of thermal annealings (the temperatures vary from 400 °C to 750 °C) on their structural properties has been studied. The structural behavior has been…
How low-temperature water develops the formation of strong hydrogen bonds with some network structure is still open to a question. Heat capacities of the water confined within silica MCM-41 nanopores with different diameters in the range 1.7-4.2 nm were measured by adiabatic calorimetry. They revealed a hump with its…
Abstract A new process that enables glassy materials to self‐repair from mechanical damage is presented in this paper. Contrary to intrinsic self‐healing, which involves overheating to enable crack healing by glass softening, this process is based on an extrinsic effect produced by vanadium boride (VB) particles dispe…
This Article reports the use of scanning electrochemical microscopy (SECM) for the quantitative study of acid-induced dissolution. An ultramicroelectrode (UME) is used to generate a flux of protons galvanostatically just above a sample surface, creating controlled acid challenges relevant to acid erosion. The electroc…