Materials Literature
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A new photochromic compound, 1,3-diphenyl-4-(3-bromobenzal)-5-hydroxypyrazole 4-phenylsemicarbazone (DP3BrBP-PSC), has been prepared. Its photochromic and thermobleaching behavior, crystal structure, and fluorescent property have been investigated in detail. The results show that the compound exhibits reversible enol-…
Dynamic structural change in Pd-perovskite automotive catalyst, LaFe0.9Pd0.1O3, which has a high catalytic activity during aging, was studied by in situ time-resolved dispersive x-ray absorption fine structure spectroscopy at 200–500 °C. An Al2O3-based conventional catalyst was also studied. In a reductive atmosphere,…
We present an investigation of heat transport in gapless graphene-based ferromagnetic/singlet superconductor/ferromagnetic junctions. We find that unlike the uniform increase in the thermal conductance versus temperature, the thermal conductance exhibits intensive oscillatory behavior versus width of sandwiched s-wave…
To develop pullulan acetate nanoparticles (PANs) as a drug nanocarrier, pullulan acetate (PA) was synthesized and characterized. Its acetylation degree determined by the proton nuclear magnetic resonance ((1)H NMR) was 2.6. PANs were prepared by the solvent diffusion method and characterized by transmission electron m…
This paper describes a two-level nonlinear model predictive control (NMPC) scheme for diesel engine lean NOx trap (LNT) regeneration control. Based on the physical insights into the LNT operational characteristics, a two-level NMPC architecture with the higher-level for the regeneration timing control and the lower-le…
Hydrotalcite nanocrystals doped with Eu(III) ions were prepared by the microemulsion method. XRPD measurements revealed that europium ions are very likely incorporated in a low-symmetry hydrotalcite-type layer. TEM and AFM imaging indicated that nanocrystals have a 150 nm width and a plate shape. Luminescence measurem…
A variant of the equal channel angular pressing (ECAP) process is examined in this paper where the channels are of rectangular shape with different thicknesses while the widths of the channels are the same. The process is named nonequal channel angular pressing and it is similar to the earlier introduced dissimilar ch…
The effect of rare-earth clustering in dielectric media on the electroluminescence (EL) intensity, the charge trapping and the EL quenching was investigated using the example of Tb and Eu-implanted SiO2 layers. It was shown that the increase in the REOX cluster size induced by an increase in the furnace annealing temp…
The dielectric and piezoelectric properties of Pb(Mg(13)Nb(23))O(3)-PbTiO(3) (PMN-PT) and Pb(In(12)Nb(12))O(3)-Pb(Mg(13)Nb(23))O(3)-PbTiO(3) (PIN-PMN-PT) ferroelectric single crystals were investigated as a function of thicknessscale in monolithic and piezoelectricpolymer 1-3 composites. For the case of PMN-PT single…
The new generation of synthetic diamonds grown as a CVD single crystal on a high pressure high temperature substrate offers a wide range of applications. In particular, because of the near tissue equivalence and its small size (good spatial resolution), CVD single crystal diamond finds applicability in radiotherapy as…
Crystallization energetics of amorphous hafnia powders and thin films on platinum substrates was studied by differential scanning calorimetry and time-resolved high temperature x-ray diffraction. For initially amorphous 25 and 20 nm films from atomic layer deposition, crystallization enthalpy decreases from −38 to −32…
We investigated the conditions for the generation of silicon sub-bandgap luminescence centers (W, R, and D1 centers) in p-type silicon wafer by self-ion implantation and thermal annealing. Luminescence centers and their spatial distributions were probed by measuring their photoluminescence (PL) spectra before and afte…
Abstract Direct electricity generation from cellulose without saccharification and fermentation processes was achieved on gold electrode under the alkaline conditions. We (i) overcame problems with the insolubility of cellulose, and captured its electrochemical potential, and (ii) showed that cellulose was converted t…
We report an investigation of interfacial physicochemical phenomena underlying adsorbate-induced ordering transitions in nitrile-containing liquid crystals (LCs) supported on surfaces coated with metal perchlorate salts. When the mass density of Al(ClO 4 ) 3 deposited onto a surface was low (0.39 ± 0.03 ng/mm 2 ), we…
Periodic solid models have been employed to investigate the structural and energetic properties of cation-disordered Mg-Al layered double hydroxides (LDHs), including composition, ordering, and stacking pattern of layers. The geometry, lattice energy and density of states (DOS) of the periodic models were computed usi…
Purpose The purpose of this paper is to describe two‐ and three‐dimensional numerical modelling of solid oxide fuel cells (SOFCs) by employing an accurate and stable fully matrix inversion free finite element algorithm. Design/methodology/approach A general and detailed mathematical model has been developed for the de…
The effects of accelerating voltage (0.5–5 keV) on the green cathodoluminescence (CL) of CaS:Ce3+ nanocrystalline powder phosphors is reported. An increase in the CL intensity was observed from the powders when the accelerating voltage was varied from 0.5 to 5 keV, which is a relevant property for a phosphor to be use…
Ferroelectric Bi0.5(Na0.82K0.18)0.5TiO3 (NKBT) thick films have been prepared using screen printing on Pt electroded alumina substrates. The room-temperature dielectric constant of resulting 60 μm thick NKBT film reaches as high as 823 at 1 kHz and the depolarization temperature, Td, locates at 130 °C. The effect of a…
Au/silica/ZnS:Mn core-shell nanostructures were synthesized and their luminescence behaviors were investigated in comparison with that of silica-coated ZnS:Mn nanoparticles. The extinction peak of Au nanoparticles is at 520 nm which is from the surface plasmon. After silica coating, the surface plasmon extinction peak…
We have demonstrated memory and rewritable bistable devices based on an anchoring transition of a nematic liquid crystal on a perfluoropolymer surface. Spontaneous orientation changes between planar and homeotropic occur on cooling and heating with a large temperature hysteresis. Photo (heat) addressing is possible fr…